基于子结构法的动车组设备舱支架优化设计

Optimization Design of High-Speed Train Equipment Cabin Bracket based on Substructure Method

依据某动车组设备舱静强度分析结果和生产实际,以设备舱支架结构为优化对象,建立拓扑优化模型并进行优化设计.考虑最恶劣的工况,基于子结构法利用Opti Struct软件对缩减后的结构进行优化设计.依据拓扑优化结果,同时考虑加工制造因素给出了新的支架设计方案,并基于该设计方案对设备舱整体结构进行了静强度分析.与支架原结构比较,优化后结构的刚度和强度都有很大程度的提高,且优化后支架结构减重约25%.优化结果为动车组设备舱结构的创新设计提供了有价值的参考.

Topology optimization model is built, and optimization design is conducted by selecting equipmentcabin as optimized object, according to static strength analysis of equipment cabin of high-speed train and theproduction practice. Considering the heaviest load case, optimization design for shrunk structure is achievedby the use of OptiStruct software based on substructure method. New bracket design is accomplished with referenceto the result of topology optimization. Taking manufacturing factor into consideration, static strength analysisof the global structure is conducted on the basis of the design. Compared with the initial structure, it isfound that stiffness and strength of the optimized bracket are promoted greatly and its weight reduces by about2 5 % . The optimization results provide valuable reference for innovative structural design of the high-speedtrain equipment cabin.