Topology Optimization Of The Thin-walled Structure With Large Length-diameter Ratio Considering The Stability Performance

Acting as a strut member,the thin-walled structure is widely used in construction,automobile and aerospace industries,and its basic requirements are light and steady.In practical engineering,however,the thin-walled structure that under axial load tends to lose the buckling.Therefore,the research on stability of the thin-walled structure cannot be neglected.This paper introduces a method of filtering design variable and implements lightweight optimization on thin-walled structure and can satisfy the stability requirements of structure as well.The main contents are as follows:1.The method of filtering design variable is developed.Meanwhile,the design of lightweight and stability of thin-walled structure is completed.In the process of structural optimization,selecting design variables that influence the stability of the structure and retaining them in order to grantee the stability requirements.The remaining design variables are optimized to meet the lightweight design requirements.2.After designing model A(B)that possesses(does not possess)filter design variables and implementing comparative analysis,the effectiveness of the method of filter design variable can be verified.The optimization results of model A and B are extracted and analyzed to verify the correctness of the optimized results.3.Adopting single-variable control method and altering parameters of the length-diameter ratio,thickness,loading and optimization constraints of the model respectively.Then,analyzing the impact that parameters have on the result of the filter design variables method.This thesis provides a method to study the optimization of the thin-walled structure.The results show that the structure can satisfy lightweight-design and meet the stability requirements as well after optimization.Therefore,it offers a reference for other researchers.