Multi-objective topology optimization of thermoelastic structures based on points density using element-free Galerkin method

被引:0
作者
Wang, Shusen [1 ]
Yi, Wei [3 ]
Qian, Hao [4 ]
Ju, Long [2 ,5 ]
机构
[1] Weifang Univ Sci & Technol, Shandong Engn Lab Clean Utilizat Chem Resources, Weifang 262700, Peoples R China
[2] Qingdao Univ Technol, Sch Mech & Automot Engn, Qingdao 266520, Peoples R China
[3] China Three Gorges Univ, Hubei Key Lab Hydroelect Machinery Design & Mainte, Yichang 443002, Peoples R China
[4] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
[5] King Abdullah Univ Sci & Technol KAUST, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia
基金
中国博士后科学基金;
关键词
Multi-objective topology optimization; Element-free Galerkin method; Thermoelastic structures; Heat dissipation; The mean compliance; COUPLED FINITE-ELEMENT; LENGTH SCALE;
D O I
10.1016/j.engstruct.2024.119515
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper introduces a numerical model for multi-objective topology optimization of thermoelastic structures using the element-free Galerkin (EFG) method and the solid isotropic material with penalization (SIMP) method. The design variable is defined as the relative density at EFG calculation points, and the multi-objective function is formulated as a weighted sum of mean compliance and heat dissipation. The paper discusses the effects of node distribution schemes, weight coefficients, and filtering on optimization outcomes. Results show that the proposed EFG model allows flexible node distribution. The weight coefficient influences the balance between heat dissipation and structural strength, affecting the normalized weighted objective function's final value. Filtering is essential for this model, with the filtering radius critically ensuring the continuity and effectiveness of optimized structures. A filtering radius of 8-16 calculation points is recommended after the testing. The proposed EFG multi-objective optimization model effectively addresses the dual design requirements for heat dissipation and strength in thermoelastic structures for practical engineering applications.
引用
收藏
页数:20
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