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通过拓扑优化寻找机身材料的合理布置,以闭式压力机组合机身为研究对象,利用SolidWorks建立机身的三维模型,然后导入到HyperMesh中,建立有限元分析模型。采用变密度法,以静力学分析为基础,定义材料的密度为设计变量,设置不同的约束条件和目标函数,通过Opti Struct求解器对机身进行拓扑优化。通过对比两种方案的优化结果,改进机身的结构,并对优化后的模型进行静力学和模态分析,验证了优化后的压力机机身符合实际使用要求。优化后压力机机身重量减少7.6%,实现了机身的轻量化,节约了成本,提高了企业的竞争力。
Through topological optimization, the reasonable layout of the fuselage material is looked for. With the closed press combination body as the research object, a three-dimensional model of the fuselage is established by using SolidWorks and then imported into HyperMesh to establish a finite element analysis model. Based on statics analysis, densification method is used to define the density of materials as design variables, different constraints and objective functions are set, and the topological optimization of the fuselage is carried out by Opti Struct solver. By comparing the optimization results of the two schemes, the structure of the fuselage is improved and the statics and modal analysis of the optimized model are carried out to verify that the optimized press body meets the requirements of actual use. Optimized press machine body weight decreased by 7.6%, to achieve the body’s lightweight, cost savings and improve the competitiveness of enterprises.