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A Shakedown Strength Based parametric Optimization Technique and Its Application on an Airtight Module

Chinese Journal of Mechanical Engineering 2022年第4期35卷 139-151页

作者： Songhua Huang Yugong Xu Lele Zhang Geng Chen Feng Liu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China National International Science and Technology Cooperation Base on Railway Vehicle Operation Beijing Jiaotong UniversityBeijing 100044China Beijing Institute of Spacecraft System Engineering Academy of Space TechnologyBeijing 100094China

In aerospace engineering,design and optimization of mechanical structures are usually performed with respect to elastic *** causing insufcient use of the material,such design concept fails to meet the ever growing needs of the light weight *** remedy this problem,in the present study,a shakedown theory based numerical approach for performing parametric optimization is *** this approach,strength of the structure is measured by its shakedown limit calculated from the direct *** numerical method developed for the structural optimization consists of nested loops:the inner loop adopts the interior point method to solve shakedown problems pertained to fxed design parameters,while the outer loop employs the genetic algorithm to fnd optimal design parameters leading to the greatest shakedown *** method established is frst verifed by the classic plate-with-a-circular-hole example,and after that it is applied to an airtight module for determining few key design *** carefully analyzing results generated during the optimization process,it is convinced that the approach can become a viable means for designing similar aerospace structures.

关键词： parametric optimal design Shakedown analysis Direct method(DM) Genetic algorithm

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