Thermal-mechanical Coupled Topology Optimization for Structures with Inertial Loads

doi:10.3901/JME.2024.13.130

Abstract

Abstract: Modern complex equipment structures are usually not only in a complex environment of thermal-mechanical coupling, but also subject to inertial forces that cannot be ignored. A high-efficiency solution method for thermoelastic topology optimization considering topology related inertial loads is proposed for this type of problem. First, a thermoelastic topology optimization model considering thermal, mechanical, and inertial loads is constructed to optimize the compliance of the structure under volume constraints; Secondly, a calculation method for inertial loads is provided, and an improved material interpolation penalty model is proposed to address the issue of non-convergence of material distribution in low density areas. Based on this, the sensitivity of structural compliance to topological variables is derived. Finally, the gradient based Method of Moving Asymptotes is used to update the topology design variables. In addition, a thermal coupling topology optimization platform based on MATLAB and ABAQUS has been developed, which can be applied to topology optimization problems of irregular structural design domains in complex engineering. The numerical example results show that the proposed method can effectively avoid the phenomenon of fuzzy structural distribution in low density areas and has good convergence.

Key words: topology optimization, thermal-mechanical coupled, inertial load

CLC Number:

O343.6

ZHENG Jing, RONG Xuanpei, JIANG Chao, MI Dong, LI Jiaqiang. Thermal-mechanical Coupled Topology Optimization for Structures with Inertial Loads[J]. Journal of Mechanical Engineering, 2024, 60(13): 130-140.

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