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采用三维设计软件SolidWorks建立某大型螺纹磨床床身的三维模型,并借助有限元软件ANSYS对其结构进行了模态分析,给出床身前三阶固有频率和相应振型,识别了该床身结构的薄弱环节,在此基础上,以床身结构固有频率和设计重量为优化目标,提出该床身结构五种改进方案,并通过对各种方案分析比较确定结构最优方案。优化后的床身与原型相比,重量降低7.84%,前三阶固有频率均有大幅提高,其中第一阶固有频率提高35.46%,实现了床身的动态优化,对大型机床床身的结构优化设计有着较大的借鉴意义。
The three-dimensional model of a large-scale screw grinder was established by using SolidWorks software, and its structure was modeled by finite element software ANSYS. The first three natural frequencies and the corresponding vibration modes were identified, and the bed was identified On the basis of this, taking the natural frequency of the bed structure and the design weight as the optimization targets, five improved schemes of the bed structure are proposed, and the optimum scheme of the structure is determined by analyzing and comparing various schemes. Compared with the prototype, the weight of the optimized bed decreases by 7.84%, and the natural frequency of the first three stages has been greatly increased. The natural frequency of the first stage has increased by 35.46%. The dynamic optimization of the bed has been realized. Optimized design has a greater reference.