摘要
工程实际中,汽车动力总成悬置系统(PMS)不可避免地存在着不确定因素。文中引入模糊变量描述PMS中具有模糊特性的不确定参数,首先推导了一种求解PMS固有特性的模糊-蒙特卡洛法;然后结合泰勒展开和中心差分法推导了一种快速求解PMS固有特性的模糊摄动-中心差分法(FPCDM);随后,基于FPCDM提出了PMS固有特性的模糊可靠性分析与优化方法;最后,通过数值算例验证了文中方法的有效性,并对系统进行了模糊可靠性分析与优化设计。
In engineering practice,various uncertainties inevitably exist in the powertrain mounting system(PMS)of vehicle.In this study,fuzzy variables were introduced to address the uncertain parameters of a PMS involving fuzziness.Firstly,the fuzzy Monte-Carlo method(FMCM)was developed to calculate the fuzzy responses of inhe-rent characteristics of PMS.Then,an efficient analysis method named as fuzzy perturbation-central difference me-thod(FPCDM)was derived to improve computational efficiency.Next,the reliability-based analysis and design optimization method of the PMS with fuzziness was proposed based on FPCDM.Finally,the effectiveness of the proposed method was verified by a numerical example,and the fuzzy reliability and optimal design of the PMS with fuzziness were also investigated.
作者
吕辉
杨坤
黄晓婷
袁煜
李沛航
LÜ Hui;YANG Kun;HUANG Xiaoting;YUAN Yu;LI Peihang(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;School of Automobile and Traffic Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,Guangdong,China)
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第10期105-112,共8页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51975217)
广东省自然科学基金资助项目(2020A1515010352)
广州市科技计划项目(201804010092)
华南理工大学中央高校基本科研业务费专项资金资助项目(2019MS058)。
关键词
动力总成悬置系统
模糊不确定性
固有特性
可靠性分析
优化设计
powertrain mounting system
fuzzy uncertainty
inherent characteristics
reliability analysis
optimized design
