关键词: 拓扑优化；轻量化；强度耐久；发动机支架；台架试验

Abstract: Based on the given powertrain design space, the optimal material distribution path analysis of the engine bracket is carried out through static and dynamic multi-objective collaborative topology optimization technology, and a new lightweight bracket structure design form is reconstructed based on the topology optimization results. The results show that the maximum equivalent stress of the structure corresponding to the most dangerous working condition of the bracket is 182 MPa, and the maximum structural principal stress of the engine bracket under dynamic ultimate load is 151 MPa. The first-order frequency of the structure converges to 826 Hz. Its structural durability, strength, and mode can all meet the design requirements. At the same time, through physical bench durability and strength performance tests, it is proved that topology optimization technology is adaptable and reliable in the conceptual design of automotive structures, providing technical support for subsequent engine bracket optimization design.

Key words: topology optimization; lightweight; strength and durability; engine bracket; bench test