基于子模型技术的车体结构可靠性优化设计  

Reliability Optimization Design of Vehicle Body Structure Based on Sub-model Technology

作　　者：陈志豪 宫琦[1] 李永华[1] CHEN Zhihao;GONG Qi;LI Yonghua(College of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028

出　　处：《机械工程师》2022年第11期12-16,共5页Mechanical Engineer

基　　金：国家自然科学基金资助项目(51875073);大连市科技创新基金计划(2019J11CY017)。

摘　　要：为了提升车体结构可靠性,保证列车安全运行。运用子模型技术与响应面法相结合对车体进行可靠性优化。首先,根据静强度分析结果对车体应力集中位置建立子模型;其次,筛选对子模型应力影响较大的变量进行试验设计拟合响应面方程,建立可靠性优化数学模型;最后,以可靠度为约束条件,采用NSGA-Ⅱ算法优化求解。研究结果表明:优化后改善了车体的应力集中,减轻了车质量,为车体的优化设计提供了参考。In order to improve the structural reliability of the car body and ensure the safe operation of the train,the reliability of the car body is optimized by combining the sub-model technology and the response surface method.According to the static strength analysis results,a sub-model is established for the stress concentration position of the vehicle body.The variables that have a greater impact on the stress of the sub-model are screened for experimental design to fit the response surface equation,and a mathematical model for reliability optimization is established.Taking reliability as the constraint condition,the NSGA-II algorithm is used to optimize the solution.The research results show that the optimization improves the stress concentration of the car body and reduces the weight of the car,which provides a reference for the optimal design of the car body.

关 键 词：车体 子模型技术 响应面法 可靠性优化 

分 类 号：U270[机械工程—车辆工程]