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Configuration Optimization Design of Magnetic Circuit for Large Magnetostrictive Devices Based on TbDyFe Alloy 认领 引用
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作者 Jinan Yu Yusheng Wen +10 位作者 Ziwei Feng Yongbo Guo Zhihao Zhang Yu Qiao Yangkun He Shizhong An Dazhuang Kang Tianli Zhang Jinghua Liu Chengbao Jiang J.M.D.Coey 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期236-245,共10页
Reliable operation of high-performance magnetostrictive devices,composed of the giant magnetostrictive material(GMM),that is,the TbDyFe alloy,critically depends on an optimally tailored bias magnetic field.Sufficient ... Reliable operation of high-performance magnetostrictive devices,composed of the giant magnetostrictive material(GMM),that is,the TbDyFe alloy,critically depends on an optimally tailored bias magnetic field.Sufficient intensity and uniformity are essential to induce the ideal initial strain in the GMM,enabling peak reciprocating output.This study develops a novel bias field scheme featuring the permanent magnet(PM)/pure iron(PI)/GMM stack assembly with dedicated thin cylindrical compensating PMs.This design first applies the principle of magnetic refraction to homogenize the magnetic field.By virtue of the refraction of the embedded PI layer at the PM/GMM interface,the magnetic field inhomogeneity within the GMM is reduced by 9%.Furthermore,a streamlined magnetic circuit model—derived from the concept of zero magnetomotive force(MMF)—provides robust support for the comprehensive magnetic leakage analysis.Finally,a large-sized giant magnetostrictive actuator(GMA)with the proposed optimized configuration was fabricated and analyzed.Results demonstrate that this design ultimately reduces magnetic field inhomogeneity from 26.7%to 1.5%while increasing the average magnetic field intensity from 54 to 67 kA m-1,and it can be extended to form devices with a large aspect ratio.This study facilitates the development of highprecision and large-output magnetostrictive devices.Additionally,it provides a generalized design paradigm for magnetic circuit structures in the development of high-performance magnetic devices. 展开更多
关键词 bias magnetic field configuration optimization design magnetostrictive devices TbDyFe alloy
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Research on Multi-Level Automatic Filling Optimization Design Method for Layered Cross-Sectional Layout of Umbilical 认领 引用 被引量：1
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作者 YIN Xu FAN Zhi-rui +4 位作者 CAO Dong-hui LIU Yu-jie LI Meng-shu YAN Jun YANG Zhi-xun 《China Ocean Engineering》 SCIE EI CSCD 2025年第5期891-903,共13页
The umbilical,a key component in offshore energy extraction,plays a vital role in ensuring the stable operation of the entire production system.The extensive variety of cross-sectional components creates highly comple... The umbilical,a key component in offshore energy extraction,plays a vital role in ensuring the stable operation of the entire production system.The extensive variety of cross-sectional components creates highly complex layout combinations.Furthermore,due to constraints in component quantity and geometry within the cross-sectional layout,filler bodies must be incorporated to maintain cross-section performance.Conventional design approaches based on manual experience suffer from inefficiency,high variability,and difficulties in quantification.This paper presents a multi-level automatic filling optimization design method for umbilical cross-sectional layouts to address these limitations.Initially,the research establishes a multi-objective optimization model that considers compactness,balance,and wear resistance of the cross-section,employing an enhanced genetic algorithm to achieve a near-optimal layout.Subsequently,the study implements an image processing-based vacancy detection technique to accurately identify cross-sectional gaps.To manage the variability and diversity of these vacant regions,the research introduces a multi-level filling method that strategically selects and places filler bodies of varying dimensions,overcoming the constraints of uniform-size fillers.Additionally,the method incorporates a hierarchical strategy that subdivides the complex cross-section into multiple layers,enabling layer-by-layer optimization and filling.This approach reduces manufac-turing equipment requirements while ensuring practical production process feasibility.The methodology is validated through a specific umbilical case study.The results demonstrate improvements in compactness,balance,and wear resistance compared with the initial cross-section,offering novel insights and valuable references for filler design in umbilical cross-sections. 展开更多
关键词 umbilical cross-sectional layout multi-level filling layered layout optimization design
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Performance evaluation and optimization design of steel slag-rubber asphalt mixture 认领 引用
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作者 Jianmin Wu Shaoqing Li Changchun Xu 《Journal of Highway and Transportation Research and Development(English Edition)》 2025年第3期61-71,共11页
Steel slag and wasted rubber tire are both solid wastes which are high production and difficult to dispose.Steel slag-rubber asphalt mixture(SSRAM)was prepared by using steel slag which replaced part of coarse aggrega... Steel slag and wasted rubber tire are both solid wastes which are high production and difficult to dispose.Steel slag-rubber asphalt mixture(SSRAM)was prepared by using steel slag which replaced part of coarse aggregate and rubber asphalt.In order to study the regularity of gradation,steel slag content and binder property on the road performance of SSRAM,three kinds of coarse aggregate fractal dimension values(Dc)and two kinds of fine aggregate fractal dimension values(Df)were selected according to fractal theory.The performance of SSRAM in three-level orthogonal scheme with three factors(Dcsteel slag content and rubber content)was analyzed and the performance of the mixture under two kinds of Dfwas compared.The results show:In the selected levels,Dcis the main factor affecting the high temperature stability and anti-freezing and thawing performance of SSRAM.With the decrease of Dc,aggregate gradation becomes coarser the dynamic stability of the mixture increases and the predicted permanent deformation decreases,but the anti-freezing and thawing performance decreases;the content of steel slag is the main factor affecting the optimal asphalt-aggregate ratio and low temperature bending strain of SSRAM.With the increase of steel slag content,the optimal asphalt-aggregate ratio increases and the low temperature bending strain of the mixture also increases;compared with base asphalt,rubber asphalt shows better performance,but the rubber content has little effect on the performance of the mixture.All SSRAM with different composition have good volume stability.For the better road performance,SSRAM composition with Dc=2.1,Df=2.55,steel slag content 60%and rubber content 21%is recommended. 展开更多
关键词 road engineering utilization of solid waste steel slag-rubber asphalt mixture pavement performance optimization design
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Optimization design of airfoils under atmospheric icing conditions for UAV 认领 引用 被引量：18
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作者 Haoran LI Yufei ZHANG Haixin CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2022年第4期118-133,共16页
Natural ice accretion on the lifting surface of an aircraft is detrimental to its aerodynamic performance, as it changes the effective streamlined body. The main focus of this work considers the optimization design of... Natural ice accretion on the lifting surface of an aircraft is detrimental to its aerodynamic performance, as it changes the effective streamlined body. The main focus of this work considers the optimization design of airfoils under atmospheric icing conditions for the Unmanned Aerial Vehicle(UAV). The ice formation process is simulated by the Eulerian approach and the three-dimensional Myers model. A three-equation turbulence model is implemented to accurately predict the stall performance of the iced airfoil. In recognition of the real atmospheric variability in the icing parameters, the medium volume diameter of supercooled water droplets is treated as an uncertainty with an assumed probability density function. A technique of polynomial chaos expansion is used to propagate the input uncertainty through the deterministic system. The numerical results show that the multipoint/multiobjective optimization strategy can efficiently improve both the ice tolerance and the cruise performance of an airfoil. The reason for the focus on robust optimization is that the ice angle of the optimized airfoil becomes less critical to the incoming flow.The optimized airfoils are applied to a UAV platform, in which the performance improvement and the relevant key flow feature are both preserved. 展开更多
关键词 Aircraft icing Ice-accretion Ice-tolerant airfoil Optimization design Separated flow UAV
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Optimization design containing dimension and buffer parameters of landing legs for reusable landing vehicle 认领 引用 被引量：11
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作者 Bo LEI Ming ZHANG +1 位作者 Hanyu LIN Hong NIE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2022年第3期234-249,共16页
For the landing legs with single air chamber in the buffer structure of the reusable landing vehicle,the geometric topological models and the dynamic model associated with the hard points of the landing legs are estab... For the landing legs with single air chamber in the buffer structure of the reusable landing vehicle,the geometric topological models and the dynamic model associated with the hard points of the landing legs are established.The geometric constraint relationship in the design of the landing legs is also obtained.The whole vehicle dropping test is conducted,and the test results agree well with that of the simulation model,which validates the dynamic model.Based on the verified model,the effect of hard point positions on the performance of the landing system is analyzed.The multidisciplinary collaborative optimization algorithm and archive-based micro genetic algorithm(CO-AMGA)are used to optimize the design parameters that contain the hard points and the damper.Compared with artificial iteration,the maximum landing impact acceleration response of the vehicle and the buffer struct maximum force are reduced by 30.70%and 14.51%respectively,and the maximum length of retractable pillar decreases by 8.54%while the design margin increases by 69.11%.The proposed optimization method is efficient and can greatly facilitate the design of landing legs. 展开更多
关键词 Dynamics Impact test Landing system Optimization design Reusable landing vehicle
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Recent advances in cobalt phosphide-based materials for electrocatalytic water splitting:From catalytic mechanism and synthesis method to optimization design 认领 引用 被引量：7
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作者 Rongrong Deng Mengwei Guo +1 位作者 Chaowu Wang Qibo Zhang 《Nano Materials Science》 EI CAS CSCD 2024年第2期139-173,共35页
Electrochemical water splitting has long been considered an effective energy conversion technology for trans-ferring intermittent renewable electricity into hydrogen fuel,and the exploration of cost-effective and high... Electrochemical water splitting has long been considered an effective energy conversion technology for trans-ferring intermittent renewable electricity into hydrogen fuel,and the exploration of cost-effective and high-performance electrocatalysts is crucial in making electrolyzed water technology commercially viable.Cobalt phosphide(Co-P)has emerged as a catalyst of high potential owing to its high catalytic activity and durability in water splitting.This paper systematically reviews the latest advances in the development of Co-P-based materials for use in water splitting.The essential effects of P in enhancing the catalytic performance of the hydrogen evolution reaction and oxygen evolution reaction are first outlined.Then,versatile synthesis techniques for Co-P electrocatalysts are summarized,followed by advanced strategies to enhance the electrocatalytic performance of Co-P materials,including heteroatom doping,composite construction,integration with well-conductive sub-strates,and structure control from the viewpoint of experiment.Along with these optimization strategies,the understanding of the inherent mechanism of enhanced catalytic performance is also discussed.Finally,some existing challenges in the development of highly active and stable Co-P-based materials are clarified,and pro-spective directions for prompting the wide commercialization of water electrolysis technology are proposed. 展开更多
关键词 Co-P electrocatalysts Water splitting Hydrogen production Catalytic mechanism Synthesis technique Optimization design
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Comprehensive optimization design of aerodynamic and electromagnetic scattering characteristics of serpentine nozzle 认领 引用 被引量：16
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作者 Yubo HE Qingzhen YANG Xiang GAO 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第3期118-128,共11页
Comprehensive optimization design of serpentine nozzle with trapezoidal outlet was studied to improve its aerodynamic and electromagnetic scattering performance.Serpentine nozzles with different center offsets and dif... Comprehensive optimization design of serpentine nozzle with trapezoidal outlet was studied to improve its aerodynamic and electromagnetic scattering performance.Serpentine nozzles with different center offsets and different ratios of the bases of the trapezoidal outlet were generated based on curvature control regulation.Computational Fluid Dynamics(CFD)simulations have been conducted to obtain the flow field in the nozzle,and Forward-Backward Iterative Physical Optics(FBIPO)method was applied to study the electromagnetic scattering characteristics of the nozzle.Guarantee Convergence Particle Swarm Optimization(GCPSO)algorithm based on Radial Basis Function(RBF)neural network was used to optimize the geometry of the nozzle in consideration of its aerodynamic and electromagnetic scattering characteristics.The results show that the GCPSO method based on RBF can be used to optimize the aerodynamic characteristics of the internal flow and the scattering characteristics of the cavity of the serpentine nozzle with irregular outlet.The optimized model has a higher center offset and a lower ratio of the bases of the trapezoidal outlet after optimization compared to the original model.The optimized model leads to a slight change in aerodynamic performance,with a total pressure recovery coefficient increase of 0.31%and a discharge coefficient increase of 0.41%.In addition,the Radar Cross Section(RCS)decreases also by around 83.33%and the overall performance is significantly improved,with a decrease of the optimized objective function by around 38.74%. 展开更多
关键词 Forward-Backward Iterative Physical Optics(FBIPO) Guarantee Convergence Particle Swarm Optimization(GCPSO) Nozzle design Optimization design Radar Cross Section(RCS) Serpentine nozzle
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Experimental validation of an integrated optimization design of a radial turbine for micro gas turbines 认领 引用 被引量：5
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作者 Lei FU Zhen-ping FENG +3 位作者 Guo-jun LI Qing-hua DENG Yan SHI Tie-yu GAO 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2015年第3期241-249,共9页
The aerodynamic performance, structural strength, and wheel weight are three important factors in the design process of the radial turbine for micro gas turbines. This study presents the experimental validation proces... The aerodynamic performance, structural strength, and wheel weight are three important factors in the design process of the radial turbine for micro gas turbines. This study presents the experimental validation process of this integrated optimization design method by using the similarity theory. Cold modeling tests and investigations into the aerodynamic characteristics were performed. Experimental results showed that the aerodynamic efficiency of the micro radial turbine is 84.3% at the design point while also satisfying the aerodynamic and strength requirements. Meanwhile, the total weight of the turbine wheel is 3.8 kg which has only a 52.8% mass of the original design. This indicates that the radial turbine designed through this technique has a high aerodynamic performance, and thus can be applied to micro gas turbines. The results validated that this integrated optimization design method is reliable. 展开更多
关键词 Micro radial turbine Integrated optimization design Bearing and shafting Performance test
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Optimization design of foundation excavation for Xiluodu super-high arch dam in China 认领 引用 被引量：11
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作者 Qixiang Fan Shaowu Zhou Ning Yang 《Journal of Rock Mechanics and Geotechnical Engineering》 CSCD 2015年第2期120-135,共16页
With better understanding of the quality and physico-mechanical properties of rocks of dam foundation,and the physico-mechanical properties and structure design of arch dam in association with the foundation excavatio... With better understanding of the quality and physico-mechanical properties of rocks of dam foundation,and the physico-mechanical properties and structure design of arch dam in association with the foundation excavation of Xiluodu arch dam,the excavation optimization design was proposed for the foundation surface on the basis of feasibility study.Common analysis and numerical analysis results demonstrated the feasibility of using the weakly weathered rocks III1and III2as the foundation surface of super-high arch dam.In view of changes in the geological conditions at the dam foundation along the riverbed direction,the design of extending foundation surface excavation area and using consolidating grouting and optimizing structure of dam bottom was introduced,allowing for harmonization of the arch dam and foundation.Three-dimensional(3D)geomechanics model test and fi nite element analysis results indicated that the dam body and foundation have good overload stability and high bearing capacity.The monitoring data showed that the behaviors of dam and foundation correspond with the designed patterns in the construction period and the initial operation period. 展开更多
关键词 Super-high arch dam Foundation surface Optimization design Stability analysis
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Optimization Design and Comprehensive Evaluation of Screw Contact of Space Battery Based on ANSYS 认领 引用 被引量：3
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作者 WANG Ziquan HUANG Wei +4 位作者 CHEN Weinan GAO Xuefeng LIN Yingjie CAO Jinghua YAO Zubin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2021年第3期474-483,共10页
In order to improve the safety of the battery of satellite side mounting,and prevent the screw from producing excess due to frequent assembly and disassembly,the YS-20 material replacement and structure optimization d... In order to improve the safety of the battery of satellite side mounting,and prevent the screw from producing excess due to frequent assembly and disassembly,the YS-20 material replacement and structure optimization design of the screw body are carried out under the premise of not changing the original tooling.The double⁃shear test of YS-20 bar is carried out,and the ANSYS optimization design module is used to design 7×7×6,a total of 294,calculation cases of D1,D2,T,the three important dimension parameters of screw structure.The actual bearing state of screw composite structure is accurately simulated by using asymmetric contact model.Three comprehensive evaluations are established,and the calculation examples satisfying the conditions are evaluated comprehensively.The final results are T=12.2 mm,D1=16 mm,D2=2 mm.The stress verification and contact analysis are carried out for the final scheme and the bearing state and contact state optimized screw structure are obtained. 展开更多
关键词 space battery screw ANSYS optimization design contact analysis comprehensive evaluation
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The Development of Highly Loaded Turbine Rotating Blades by Using 3D Optimization Design Method of Turbomachinery Blades Based on Artificial Neural Network & Genetic Algorithm 认领 引用 被引量：6
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作者 周凡贞 冯国泰 蒋洪德 《Chinese Journal of Aeronautics》 EI CAS 2003年第4期198-202,共5页
In order to improve turbine internal efficiency and lower manufacturing cost, a new highly loaded rotating blade has been developed. The 3D optimization design method based on artificial neural network and genetic alg... In order to improve turbine internal efficiency and lower manufacturing cost, a new highly loaded rotating blade has been developed. The 3D optimization design method based on artificial neural network and genetic algorithm is adopted to construct the blade shape. The blade is stacked by the center of gravity in radial direction with five sections. For each blade section, independent suction and pressure sides are constructed from the camber line using Bezier curves. Three-dimensional flow analysis is carried out to verify the performance of the new blade. It is found that the new blade has improved the blade performance by 0.5%. Consequently, it is verified that the new blade is effective to improve the turbine internal efficiency and to lower the turbine weight and manufacturing cost by reducing the blade number by about 15%. 展开更多
关键词 optimization design highly loaded rotating blades artificial neural network genetic algorithm
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A new slope optimization design based on limit curve method 认领 引用 被引量：4
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作者 FANG Hong-wei CHEN Yohchia DENG Xiao-wei 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第7期1856-1862,共7页
A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slo... A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slope intersect at the toe of the slope. Compared with the strength reduction (SR) method, finite element limit analysis method, and the SR method based on Davis algorithm, the new method is suitable for determining the slope stability and limit slope angle (LSA). The optimal slope shape is determined based on a series of slope heights and LSA values, which increases the LSA by 2.45°-11.14° and reduces an invalid overburden amount of rocks by 9.15%, compared with the space mechanics theory. The proposed method gives the objective quantification index of instability criterion, and results in a significant engineering economy. 展开更多
关键词 slope optimization design limit state limit curve method limit slope angle
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Optimization Design for the Sandwich Piezoelectric Transmitters in Acoustic Logging 认领 引用 被引量：2
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作者 魏倩 王秀明 +1 位作者 车承轩 丛健生 《Chinese Physics Letters》 SCIE EI CAS CSCD 2016年第7期102-104,共3页
An optimized transducer prototype with a sandwich structure vibrated longitudinally is proposed for a transmitter in acoustic logging, especially in acoustic logging while drilling, 5y taking account of drilling envir... An optimized transducer prototype with a sandwich structure vibrated longitudinally is proposed for a transmitter in acoustic logging, especially in acoustic logging while drilling, 5y taking account of drilling environments with high temperature and pressure, as well as strong collar drilling vibration during the drilling process. Aimed to improve the transmitting performance, numerical and experimental studies for the transducer optimization are conducted. The impact of location and length of the piezoelectric stack on resonance characteristics arid effective electromeehanical coupling coefficient is calculated and analyzed. Admittance and transmitting performance of the proposed transducer are measured in laboratory experiments, and the results are compared with simulated ones. It is shown that the newly proposed transducer has higher transmitting performance with lower resonance frequencies. This work provides theoretical and experimental bases for transducer designing and acoustic wave measurements in acoustic logging, especially in acoustic logging while drilling. 展开更多
关键词 of on in Optimization Design for the Sandwich Piezoelectric Transmitters in Acoustic Logging is for
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Optimization Design for Fixed Table of Gantry Machining Center Based on Sensitivity and Topology Analyses 认领 引用 被引量：4
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作者 郑彬 殷国富 +2 位作者 黄辉 陈强 方辉 《Journal of Donghua University(English Edition)》 EI CAS 2013年第4期263-268,共6页
In order to decrease the deformation and stress and increase the natural frequency of the fixed table,a method of optimization driven by the sensitivity and topology analyses is proposed.The finite element model of th... In order to decrease the deformation and stress and increase the natural frequency of the fixed table,a method of optimization driven by the sensitivity and topology analyses is proposed.The finite element model of the fixed table is constructed and analyzed by using ANSYS software.Based on the results of static analysis and modal analysis,the maximum deformation,the maximum stress,and natural frequencies are obtained.Then,the sensitivity analysis and topology optimization are carried out to find out the parameters to be optimized.The fixed table is reconstructed according to optimal design scheme.In the comparison of the results between original model and the optimized one,the maximum deformation and stress are decreased by 71.73%and 60.27%respectively.At the same time,the natural frequencies from the first mode to the sixth mode are increased by 30.28%,29.57%,29.51%,31.52%,22.19%,and 21.80%,respectively.The method can provide technology guide for the design and optimization of machining structure. 展开更多
关键词 gantry machining center sensitivity analysis topology optimization optimization design fixed tableCLC number：TG502Document code：AArticle ID：1672-5220（2013）04-0263-06
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Optimization Design of Fairings for VIV Suppression Based on Data-Driven Models and Genetic Algorithm 认领 引用 被引量：1
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作者 LIU Xiu-quan JIANG Yong +3 位作者 LIU Fu-lai LIU Zhao-wei CHANG Yuan-jiang CHEN Guo-ming 《China Ocean Engineering》 SCIE EI CSCD 2021年第1期153-158,共6页
Vortex induced vibration(VIV)is a challenge in ocean engineering.Several devices including fairings have been designed to suppress VIV.However,how to optimize the design of suppression devices is still a problem to be... Vortex induced vibration(VIV)is a challenge in ocean engineering.Several devices including fairings have been designed to suppress VIV.However,how to optimize the design of suppression devices is still a problem to be solved.In this paper,an optimization design methodology is presented based on data-driven models and genetic algorithm(GA).Data-driven models are introduced to substitute complex physics-based equations.GA is used to rapidly search for the optimal suppression device from all possible solutions.Taking fairings as example,VIV response database for different fairings is established based on parameterized models in which model sections of fairings are controlled by several control points and Bezier curves.Then a data-driven model,which can predict the VIV response of fairings with different sections accurately and efficiently,is trained through BP neural network.Finally,a comprehensive optimization method and process is proposed based on GA and the data-driven model.The proposed method is demonstrated by its application to a case.It turns out that the proposed method can perform the optimization design of fairings effectively.VIV can be reduced obviously through the optimization design. 展开更多
关键词 optimization design vortex induced vibration suppression devices data-driven models BP neural network genetic algorithm
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Optimization design method for the bypass trajectories of infill adjustment wells in the fracturing areas of shale gas fields 认领 引用 被引量：1
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作者 Gu Yue Gao Deli +3 位作者 Yang Jin Diao Binbin Hu Degao Nie Shuaishuai 《Natural Gas Industry B》 2021年第2期205-215,共11页
In the design of a shale-gas cluster horizontal well,it is necessary to consider the bypass of the fracturing influence domains of existing wells and the interference between fracturing influence domains when the well... In the design of a shale-gas cluster horizontal well,it is necessary to consider the bypass of the fracturing influence domains of existing wells and the interference between fracturing influence domains when the wellbore trajectories of infill adjustment wells in the fracturing areas are designed.In order to quickly evaluate the rationality of the design scheme of fracturing wellbore trajectory in an infill adjustment well,this paper adopted the vector algebra method to build a geometric model of the obstacles in the shale gas fracturing area.In this geometric model,the influence domains of hydraulic fractures are taken into account.Then,based on this geometric model,the optimization design model of bypass trajectory in the shale gas fracturing area was established by taking the minimization of total trajectory length and trajectory potential energy as the optimization objective and the anti-collision between trajectories as the constraint.Besides,the geometric check method to judge if there is any interference between fracturing influence domains was provided.Finally,the established optimization design model was verified based on the actual drilling data of Fuling Shale Gas Field in the Sichuan Basin.And the following research results were obtained.First,the obstacle sizes in fracturing areas will be seriously underestimated if the fracturing influence domains are neglected.Second,if the fracturing influence domains are neglected,the designed bypass trajectory can bypass the wellbore trajectories of old wells,but may intersect the fracturing influence domains of existing wells,thus inducing drilling accidents.In conclusion,the proposed optimization design model of bypass trajectory in the shale gas fracturing area can satisfy the constraint of anti-collision and bypass and achieve the optimization objective of minimizing total trajectory length and trajectory potential energy,and the corresponding design calculation avoids complex calculation and check. 展开更多
关键词 Shale gas Adjustment well in the fracturing area Bypass design of directional well Optimization design of wellbore trajectory Vector algebra Total trajectory length Trajectory potential energy Optimization model
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OPTIMIZATION DESIGN OF HYDRAULIC MANIFOLD BLOCKS BASED ON HUMAN-COMPUTER COOPERATIVE GENETIC ALGORITHM 认领 引用 被引量：10
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作者 Feng YiLi LiTian ShujunSchool of Mechanical Engineering,Dalian University of Technology,Dalian 116024, China 《Chinese Journal of Mechanical Engineering》 EI CAS 2003年第3期317-320,共4页
Optimization design of hydraulic manifold blocks (HMB) is studied as acomplex solid spatial layout problem. Based on comprehensive research into structure features anddesign rules of HMB, an optimal mathematical model... Optimization design of hydraulic manifold blocks (HMB) is studied as acomplex solid spatial layout problem. Based on comprehensive research into structure features anddesign rules of HMB, an optimal mathematical model for this problem is presented. Usinghuman-computer cooperative genetic algorithm (GA) and its hybrid optitation strategies, integratedlayout and connection design schemes of HMB can be automatically optimized. An example is given totestify it. 展开更多
关键词 Hydraulic manifold blocks (HMB) Human-computer cooperation Geneticalgorithm Optimization design
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Optimization design of the angle detecting system used in the fast steering mirror 认领 引用 被引量：1
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作者 倪迎雪 吴佳彬 +5 位作者 伞晓刚 高世杰 丁少行 王晶 王涛 王惠先 《Optoelectronics Letters》 EI 2018年第1期48-52,共5页
In this paper, in order to design a fast steering mirror(FSM) with large deflection angle and high linearity, a deflection angle detecting system(DADS) using quadrant detector(QD) is developed. And the mathematical mo... In this paper, in order to design a fast steering mirror(FSM) with large deflection angle and high linearity, a deflection angle detecting system(DADS) using quadrant detector(QD) is developed. And the mathematical model describing DADS is established by analyzing the principle of position detecting and error characteristics of QD. Based on this mathematical model, the variation tendencies of deflection angle and linearity of FSM are simulated. Then, by changing the parameters of the DADS, the optimization of deflection angle and linearity of FSM is demonstrated. Finally, a QD-based FSM is designed based on this method, which achieves ±2° deflection angle and 0.72% and 0.68% linearity along x and y axis, respectively. Moreover, this method will be beneficial to the design of large deflection angle and high linearity FSM. 展开更多
关键词 Optimization design of the angle detecting system used in the fast steering mirror length
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PARAMETERIZED-PROTOTYPE-BASED DYNAMIC OPTIMIZATION DESIGN FOR CAM PROFILE 认领 引用 被引量：1
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作者 彭禹 郝志勇 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2007年第4期310-316,共7页
Aiming at the problems in current cam profile optimization processes, such as simple dynamics models, limited geometric accuracy and low design automatization level, a new dynamic optimization mode is put forward. Bas... Aiming at the problems in current cam profile optimization processes, such as simple dynamics models, limited geometric accuracy and low design automatization level, a new dynamic optimization mode is put forward. Based on the parameterization modeling technique of MSC. ADAMS platform, the different steps in current mode are reorganized, thus obtaining an upgraded mode called the ＂parameterized-prototype-based cam profile dynamic optimization mode＂. A parameterized prototype（PP） of valve mechanism is constructed in the course of dynamic optimization for cam profiles. Practically, by utilizing PP and considering the flexibility of the parts in valve mechanism, geometric accuracy and design automatization are improved. 展开更多
关键词 valve mechanism cam profile optimization design parameterized prototype dynamic optimization
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Investigation on Optimization Design of an Equivalent Water Depth Truncated Mooring System Based on INSGA-Ⅱ 认领 引用 被引量：1
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作者 Huoming Zhang Wenjun Gao +2 位作者 Qiang Wang Juan Jiang Zhou Zhao 《Journal of Marine Science and Application》 2012年第2期208-215,共8页
At present,equivalent water depth truncated mooring system optimization design is regarded as the priority of hybrid model testing for deep sea platforms,and will replace the full depth system test in the future.Compa... At present,equivalent water depth truncated mooring system optimization design is regarded as the priority of hybrid model testing for deep sea platforms,and will replace the full depth system test in the future.Compared with the full depth system,the working depth and span are smaller in the truncated one,and the other characteristics maintain more consistency as well.In this paper,an inner turret moored floating production storage&offloading system(FPSO)which works at a water depth of 320m,was selected to be a research example while the truncated water depth was 80m.Furthermore,an improved non-dominated sorting genetic algorithm(INSGA-II)was selected to optimally calculate the equivalent water depth truncated system,considering the stress condition of the total mooring system in both the horizontal and vertical directions,as well as the static characteristic similarity of the representative single mooring line.The results of numerical calculations indicate that the mathematical model is feasible,and the optimization method is fast and effective. 展开更多
关键词 deep sea platforms hybrid model test equivalent water depth truncated mooring system optimization design
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