摘要
将疲劳累积损伤引入结构优化的数学模型中,在结构轻量化的同时考虑了结构的疲劳设计问题。以动车组设备舱支架为研究对象,利用BS EN 12663-1:2010+A1:2014标准施加载荷对其进行静强度分析,根据BS 7608:2014+A1:2015标准对危险位置进行疲劳分析,并以各工况下最大Mises应力和危险焊缝位置的累积损伤为约束、支架质量最小为目标建立优化模型。采用Isight软件将有限元模型参数化,以型材的厚度为设计变量并对其进行试验设计,建立焊缝的累积损伤和Mises应力的Kriging代理模型,通过优化求解,该结构质量减轻了4.98%,为其轻量化和抗疲劳协同设计提供了参考依据。
The fatigue cumulative damage is introduced into the mathematical model of structural optimization, and the fatigue design problem is considered while the structure is lightweight. Taking the EMU equipment cabin bracket as the research object, the static strength analysis was carried out using the EN12663 standard, and the fatigue analysis was carried out on the dangerous position according to the BS7608 standard. The optimal model was established with the maximum von Mises stress and the cumulative damage of the dangerous weld position under various conditions as the constraint, and the minimum quality of the bracket as the target. The finite element model was parameterized by Isight software, and the thickness of the profiles was used as the design variable, and the test design was carried out. The Kriging proxy model with weld cumulative damage and von Mises stress is established. The quality of the structure is reduced by 5.26% through optimization, which provides a reference for the lightweight and anti-fatigue collaborative design.
作者
邱广宇
张志超
史少聪
QIU Guangyu;ZHANG Zhichao;SHI Shaocong(Zhan Tianyou College(CRRC College),Dalian Jiaotong University,Dalian 116028,China;CRRC Qiqihar Rolling Stock Co.,Ltd.Qiqihar 161000,China)
出处
《大连交通大学学报》
CAS
2024年第6期38-42,91,共6页
Journal of Dalian Jiaotong University
基金
中车齐齐哈尔车辆有限公司研发项目(20200073)。
