Abstract: In a certain off-road tire crane project, the swing bracket designed with the original welded forming process experienced fatigue fracture during the whole machine test due to factors such as strength and welding defects. To address the bracket failure, the project team utilized topology optimization technology to conduct iterative optimization on the bracket structure while keeping the connection interfaces of the frame and axle unchanged, aiming to obtain the material distribution and force path of the structure. Based on the integral casting process, the swing bracket design was optimized. Eventually, the optimized swing bracket design, after being verified through simulation analysis, bench tests, and reliability validation, achieved a weight reduction of 54 kg, with a weight reduction ratio of 19.4%, and also accumulated experience for the application of topology optimization technology in the design and development of similar products.

Key words: swing bracket; topological optimization; forming process; integral casting

摘要： 在某越野轮胎起重机项目中，采用原焊接成形工艺设计的摆架在整机试验中由于强度、 焊接缺陷等因素发生疲劳断裂。为解决支架失效问题，项目团队采用拓扑优化技术对支架结 构进行迭代优化，同时保持车架和车轴连接接口不变，以获取结构的材料分布和受力路径。 基于整体铸造工艺，对摆动支架设计进行了优化。最终，经过仿真分析、台架试验和可靠性 验证的优化摆动支架设计，实现了减重 54 kg，减重比达 19.4%，同时也为拓扑优化技术在类 似产品设计开发中的应用积累了经验。

关键词: 摆动支架；拓扑优化；成型工艺；整体铸造