首页> 中文期刊>汽车安全与节能学报 >基于序列Kriging模型的汽车车身轻量化可靠性优化设计

基于序列Kriging模型的汽车车身轻量化可靠性优化设计

     

摘要

A reliability-based design optimization method was presented based on the sequential Kriging method to decrease the computational intensity and to improve the accuracy of the traditional reliability-based design optimization of automobile body structure for the lightweight design of vehicle body. The vehicle mass was selected as the objective of optimization, and the crashworthiness responses were chosen as the reliability constraints to establish the reliability optimization design model. The sampling data of finite element model for vehicle frontal crash was generated and calculated by using the Latin hypercube design of experiment, and Kriging models for objective and constraint functions were built up according to the simulation results to improve the computational efficiency. The sequential optimization and reliability assessment (SORA) method was used to decouple the nested optimization into a single level optimization. On each iteration, a performance measure method was adopted to evaluate probabilistic constraints based on Kriging model to enhance the computational accuracy. The results show that the method can meet the needs of the efficiency and accuracy for the engineering design, and meet the reqirements of automotive safety, light weight and reliability. The vehicle mass is reduced by about 1.4%.%为减少汽车车身轻量化可靠性优化设计的计算量并提高优化设计的精度,提出一种序列Kriging可靠性优化设计方法.以整车质量作为优化目标,选取整车耐撞性指标作为可靠性约束,建立可靠性优化设计模型.采用Latin超立方试验设计生成汽车正面碰撞有限元仿真模型的样本数据进行计算,根据有限元仿真结果构建目标和约束函数的Kriging近似模型;采用序列优化与可靠性评定方法(SORA)将该嵌套优化问题解耦为单层次优化问题;优化每一迭代步,基于Kriging模型采用功能度量法评定概率约束.结果表明:所提方法满足工程设计所需的效率和精度要求,满足了整车安全性、轻量化和可靠性设计要求,整车质量减少约1.4%.

著录项

  • 来源
    《汽车安全与节能学报》|2017年第2期|205-212|共8页
  • 作者单位

    长沙理工大学 工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙 410114,中国;

    长安大学 汽车运输安全保障技术交通行业重点实验室,西安 710064,中国;

    长沙理工大学 工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙 410114,中国;

    湖南大学 机械与运载工程学院,长沙 410082,中国;

    长沙理工大学 工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙 410114,中国;

    长沙理工大学 工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙 410114,中国;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 汽车可靠性;
  • 关键词

    汽车轻量化; 耐撞性; Kriging模型; 可靠性优化设计; 序列优化;

  • 入库时间 2023-07-26 01:01:15

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