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, 黄晓婷, 等

doi:10.12141/j.issn.1000-565X.200026

华南理工大学学报(自然科学版) >

2020 , Vol. 48 >Issue 10: 105 - 112

DOI: https://doi.org/10.12141/j.issn.1000-565X.200026

机械工程

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

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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

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

收稿日期: 2020-01-15

修回日期: 2020-04-24

网络出版日期: 2020-05-08

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)

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

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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

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

Received date: 2020-01-15

Revised date: 2020-04-24

Online published: 2020-05-08

Supported by

Supported by the National Natural Science Foundation of China (51975217) and the Natural Science Founda-tion of Guangdong Province (2020A1515010352)

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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

本文引用格式

吕辉, 杨坤, 黄晓婷, 等 . 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[J]. 华南理工大学学报(自然科学版), 2020 , 48(10) : 105 -112 . DOI: 10.12141/j.issn.1000-565X.200026

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

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