华南理工大学学报(自然科学版) ›› 2020, Vol. 48 ›› Issue (10): 105-112.doi: 10.12141/j.issn.1000-565X.200026

• 机械工程 • 上一篇    下一篇

含模糊不确定性的动力总成悬置系统固有特性分析与优化

吕辉杨坤1 黄晓婷2† 袁煜1 李沛航1   

  1. 1. 华南理工大学 机械与汽车工程学院,广东 广州 510640; 2. 华南理工大学广州学院 汽车与交通工程学院,广东 广州 510800

  • 收稿日期:2020-01-15 修回日期:2020-04-24 出版日期:2020-10-25 发布日期:2020-09-14
  • 通信作者: 黄晓婷(1988-),女,硕士,助教,主要从事汽车 NVH 研究。 E-mail:huangxiaoting1@gcu. edu. cn
  • 作者简介:吕辉(1986-),男,博士,副教授,主要从事汽车 NVH 分析与控制研究。E-mail: melvhui@ scut. edu. cn
  • 基金资助:
    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)

Inherent Characteristics Analysis and Optimization of Powertrain Mounting Systems Involving Fuzzy Uncertainty

Lü Hui1 YANG Kun1 HUANG Xiaoting2 YUAN Yu1 LI Peihang1   

  1. 1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. School of Automobile and Traffic Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,Guangdong,China
  • Received:2020-01-15 Revised:2020-04-24 Online:2020-10-25 Published:2020-09-14
  • Contact: 黄晓婷(1988-),女,硕士,助教,主要从事汽车 NVH 研究。 E-mail:huangxiaoting1@gcu. edu. cn
  • About author:吕辉(1986-),男,博士,副教授,主要从事汽车 NVH 分析与控制研究。E-mail: melvhui@ scut. edu. cn
  • Supported by:
    Supported by the National Natural Science Foundation of China (51975217) and the Natural Science Founda-tion of Guangdong Province (2020A1515010352)

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。

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

Abstract: 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 pro-posed method was verified by a numerical example,and the fuzzy reliability and optimal design of the PMS with fuzziness were also investigated.

Key words: powertrain mounting system, fuzzy uncertainty, inherent characteristics, reliability analysis, opti-mized design