大吨位履带起重机履带板拓扑优化分析  

Topology optimization analysis of track shoes of large tonnage crawler crane

作　　者：葛树伟 王欣[1] 滕儒民[1] Ge Shuwei;Wang Xin;Teng Rumin(School of Mechanical Engineering,Dalian University of Technology,Liaoning Dalian,116023,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116023

出　　处：《机械设计与制造工程》2024年第7期1-5,共5页Machine Design and Manufacturing Engineering

摘　　要：以800 t级履带起重机为研究对象,针对其履带板质量大和结构不合理问题,对履带板结构进行拓扑优化。首先分析行走机构在危险工况下的受力情况,得到履带板的边界条件,对原始结构进行有限元分析;其次借助变密度法,以体积分数为约束条件,以加权应变能最小为目标函数,对履带板进行拓扑优化,并以拓扑优化结果为参考构建履带板的概念模型;最后验证优化结构的合理性。结果表明:优化后履带板的最大平均等效应力降低26%,应力均布性有所提高,且单个履带板质量减少8 kg。履带板结构的合理化设计对于履带起重机行走机构性能优化和轻量化具有重大意义。Taking the 800 t class crawler crane as the research object,the topology optimization of track shoe structure is carried out to design a better form of structure in view of its large mass and unreasonable structure.Firstly,it analyzes the force of the travelling mechanism under dangerous working conditions,gets the boundary conditions of the track shoe,and carries out finite element analysis of the original structure.Secondly,with the help of variable density method,it optimizes the topology of the track shoe by taking the volume fraction as the constraints,and the minimum weighted strain energy as the objective function,and construct the conceptual model of the track shoe by taking the results of topology optimization as the references.Finally it verifies the reasonableness of the optimized structure.The results show that the maximum average equivalent stress of the optimized track shoe is reduced by 26%,the stress homogeneity is improved,and the mass of a single track shoe is reduced by 8 kg.The rationalized design of the track shoe structure is of great significance for the optimization of the crawler crane travelling mechanism performance and light-weighting.

关 键 词：履带板 有限元 拓扑优化 强度 质量 

分 类 号：TH213.7[机械工程—机械制造及自动化]