动力集中动车组车体司机室结构优化设计

Optimization Design of Cab Structure in Power Concentrated EMU

动力集中动车组司机室结构对保证司机人员安全有重要作用,在确保结构安全的基础上,设置合理的传力路径进行结构补强,可以实现碰撞工况下的司机室角柱和防撞柱及相关结构的轻量化,对高速重载要求下的动机集中动车组设计有重要意义。采用拓扑优化方法对某型动力集中动车组车体司机室结构进行拓扑优化设计,寻求角柱和防撞柱的最优布局,以此为基础,重构司机室结构并进行尺寸优化。计算结果表明,通过拓扑优化和几何尺寸优化的一体化设计,在满足原始设计结构的设计强度的条件下,基于拓扑构型所设计的司机室结构重量明显减小,其中重构的防撞柱构型和重构的角柱构型总重量相对于初始设计减重67.5%,减重效果明显。

The cab structure takes the key role for the safety of driver inthe powder concentrated EMU.The structural strengthening by the design of reasonable load paths can be used for the structural weight reduction of the corner and collision pillars in the load case of collision under the condition of structural safety.This can be meaningful for designing the power concentrated EMU with heavy load and high speed.The topological optimization was used for the topology design of the cab structure in the power concentrated EMU,in which the distributions of the corner and collision pillars can be obtained.Based on the obtained re-generated structures,the geometrical size optimization is further used.Results indicate that the weight of the cab structure can be obviously reduced by integratingthe topological and geometrical optimizations under the condition of structural safety.In comparison with the initial design,the weight of the cab structure can be obviously reduced.All the weight of the new corner pillar andcollision pillar can be reduced by up to 67.5%.The weight of cab can be obviously reduced by the present integrating topological and geometrical optimization method.