Multi-objective Topology Optimization Design for a Certain Launcher Bracket

Yue Ma; Qilin Shu; Longjun Tan; Yuekang Yue; Chen Tian

doi:10.61187/ita.v2i2.118

Authors

Yue Ma Shenyang Ligong University, School of Mechanical Engineering, Shenyang 110159, China
Qilin Shu
shuqilin@sylu.edu.cn
Shenyang Ligong University, School of Mechanical Engineering, Shenyang 110159, China
Longjun Tan Shanghai Donghu Machinery Factory, Shanghai 201900, China
Yuekang Yue Shanghai DongHu machinery factory, Shanghai 201900, China
Chen Tian Beijing Zhongke Aerospace Talent Service Co., LTD. Jiangsu branch, Nanjing 210000, China

Keywords:

bracket, topology, optimization, multi-objective, Compromise Programming method

Abstract

To achieve weight reduction and enhance the firing accuracy of a specific type of launch device, the bracket was selected as the optimization subject for multi-objective topology optimization. Single-objective optimization often overlooks other influencing factors. To address the limitations of single-objective optimization, this study adopts the variable density method from the SIMP approach and proposes a multi-objective topology optimization based on compromise programming. This study, through multi-objective topology optimization of the bracket, obtained an optimized topology structure that maximizes static stiffness and the dynamic low-order natural frequencies of the launch device bracket at launch angles of 0°, 53°, and 85°, with an azimuth angle of 0°. Finally, the obtained topology structure was validated using finite element software. The design method presented in this paper not only enhanced the stiffness of the bracket structure for such launch devices and increased the first two natural frequencies of the bracket but also achieved weight reduction. The optimization design process also provides a reference for other mechanical structures.

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