Indexed by:会议论文

Date of Publication:2006-01-01

Included Journals:CPCI-S

Page Number:641-646

Key Words:topology optimization; thermoelasticity; concurrent optimization; porous anisotropic material; homogenization

Abstract:This paper presents a concurrent topology optimization method to achieve the optimum structure and material microstructure simultaneously to minimize system compliance of thermoelastic structures under both thermal and mechanical loads. Macro and micro densities are chosen as the design variables for structure and material microstructure independently and integrated into one system with the help of homogenization theory. The distribution of base material between the structure and material can be decided automatically by the optimization model. Microstructure is assumed to be uniform at macro scale to reduce manufacturing cost. Penalization approaches and perimeter control method (in micro scale) are adopted at both scales to ensure clear topologies, i.e. SIMP (Solid Isotropic Material Penalization) in micro-scale and PAMP (Porous Anisotropic Material Penalization) in macro-scale. The proposed method is validated by the numerical experiments. The effects of temperature differential, volume of base material, numerical parameters on the optimum results are also discussed.