应用拓扑优化的发动机液压泵支架轻量化设计  

Lightweight Design of Engine Hydraulic Pump Bracket with Topological Optimization

作　　者：刘宏杰 曾超 刘伦伦 李雷 Liu Hongjie;Zeng Chao;Liu Lunlun;Li Lei(State Key Laboratory of Reliability of Internal Combustion Engines,Weifang,Shandong,261000,China;Weichai Power Co.,Ltd.)

机构地区：[1]内燃机可靠性国家重点实验室,山东潍坊261000 [2]潍柴动力股份有限公司

出　　处：《小型内燃机与车辆技术》2020年第1期44-48,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：应用OptiStruct实现发动机液压泵支架的轻量化。首先,考虑设计边界和工艺约束,进行单目标优化,得到的优化结果难以重构三维模型。然后,通过构建评价函数,调整优化方法,进行多目标优化,优化结果的受力传递路径清晰、明确。最后,分析了结构改进前后的模态、应力分布和疲劳性能。结果表明:拓扑优化改善了结构的受力状态,避免了应力集中现象,刚度、强度、疲劳安全系数等性能均有明显提升,支架质量减轻了31%。OptiStruct is used to achieve lightweight of the engine hydraulic pump bracket.Firstly,considering the design boundary and process constraints,single-objective optimization is carried out,and the obtained optimization results are difficult to reconstruct the 3D model.Then,by constructing the evaluation function,adjusting the optimization method,and performing multi-objective optimization,the force transmission path of the optimization result is clear and clear.Finally,the modality,stress distribution and fatigue performance before and after structural improvement are analyzed.The results show that topological optimization improves the stress state of the structure and avoids stress concentration.The performances such as stiffness,strength and fatigue safety coefficient are obviously improved.The quality of the stent was reduced by 31%.

关 键 词：结构轻量化 多目标拓扑优化 OptiStruct 安全系数 

分 类 号：TK413.83[动力工程及工程热物理—动力机械及工程]