Multi-objective topological optimization of heat insulation structures used in high-speed train

For the high-speed train, the characteristics of heat insulation structures are the significant consideration in performance evaluation. The structures utilized in floor, side-wall, and ceiling are researched. The objective of this paper is to improve their performances of stiffness, heat insulation and weight. The thickness of profile would be reduced (the thickness of blanket of glass wool would increase) by parameter optimization in order to improve the heat-insulating property. The topological optimization is implemented to change the load transfer path and to enhance the stiffness of structures. The optimized result is hence achieved, and the manufacturability process is carried out. Finally, the performances of stiffness, heat insulation and weight are improved. And the effectiveness of the analysis is validated by finite element simulation. Consequently, this paper can provide quick calculations for the heat insulation structures of high-speed train. © 2016, Editorial Board of JBUAA. All right reserved.