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为了更好地实现转向架构架的轻量化设计,根据设计经验,采用渐进结构优化法(ESO)的基本思想,通过对ANSYS单元生死功能的二次开发,应用APDL(ANSYS Parametric Design Language)编制拓扑优化程序,以直观的有限元模型代替复杂的拓扑优化的数学模型,提出了一种构架拓扑优化设计的工程方法。通过方法优化,使某高速动力车转向架构架在疲劳强度符合要求的前提下,结构应力趋于均匀分布,质量减少了143.92kg。结果表明,提出的方法是有效的和可行的,具有一定的工程实用价值,为设计提供依据。
In order to realize the lightweight design of the bogie frame better, according to the design experience, the basic idea of Asymptotic Structure Optimization (ESO) is adopted. By using the secondary development of the life and death function of the ANSYS unit, the APDL (ANSYS Parametric Design Language) Optimization program to replace the complex mathematical model of topological optimization with an intuitive finite element model, an engineering method of structural topology optimization design is proposed. Through the optimization of the method, the structural stress tends to be evenly distributed with the mass reduced by 143.92kg under the premise of meeting the requirements of the fatigue strength of the bogie frame of a high-speed motor vehicle. The results show that the proposed method is effective and feasible, and has certain engineering practical value, which provides the basis for design.