CONCURRENT OPTIMIZATION OF STRUCTURE COMPOSED OF POROUS CERAMIC WITH THERMAL AND STRUCTURAL OBJECTIVES
The optimization formulations are studied for the concurrent optimization of the load carrying spacecraft structures composed of porous ceramic materials, which combine high stiffness with low thermal expansion in a predefined domain. The optimal results of single objective and multi-objective models are compared and the merits of the multi-objective models are explained. To realize the concurrent optimization of the structures composed of porous ceramic material, the independent macro and micro densities are introduced as the design variables and penalization approaches are adopted in both scales, i.e. SIMP (Solid Isotropic Material Penalization) in micro material scale and PAMP (Porous Anisotropic Material Penalization) in macro structure scale. A sandwich elliptically curved shell is optimized to verify the concurrent multi-scale design of structure configuration and microstructure of porous ceramic. And the axial symmetric and 3D concurrent optimization results are shown. The numerical examples demonstrate that the porous material is conducive to enhance the thermal and load carrying performances of sandwich shells.
Jun Van Jiadong Deng Gengdong Cheng
State Key Lab of Structural Analysis for Industrial Equipment and Department of Engineering Mechanic State Key Lab of Structural Analysis for Industrial Equipment and Department of Engineering Mechanic
国际会议
2nd International Conference on Computational Methods for Thermal Problems(第二届热问题计算方法国际会议)
大连
英文
137-140
2011-09-05（万方平台首次上网日期，不代表论文的发表时间）