考虑多工况油箱支架结构拓扑优化研究

摘要

为保证油箱支架结构能更好地满足不同行驶工况下的承载要求,需要在设计阶段考虑其在多工况下的静态刚度特性,对整个支架结构进行合理的多目标拓扑优化设计.基于固体各向同性材料惩罚函数优化理论,运用折衷规划法定义了车辆在不同行驶工况下的静态刚度拓扑优化目标函数,根据优化结果,设计出了一种满足刚度要求的新支架结构.%In order to ensure that the fuel tank bracket structure can satisfy the bearing requirement in different driving cases, it is necessary to consider the static stiffness characteristics of multiple loading cases during the design phase and conduct reasonable multi-objective topology optimization design for the whole bracket structure. Based on the solid isotropic material with penalization optimization theory, the objective functions of the static stiffness topology optimization under different driving cases is defined by compromise programming method, according to the optimization result, a new bracket structure is designed, which can satisfy the stiffness demand.