RESEARCH ＆ APPLICATION OF SERVICE-LOADS ENVIRONMENT FOR COMMERCIAL VEHICLE BASED ON NON-PARAMETRIC KERNEL DENSITY ESTIMATION METHOD

LUAN ShiJie; YU JiaWei; ZHENG SongLin; JING Qing

doi:10.16579/j.issn.1001.9669.2020.02.028

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RESEARCH ＆ APPLICATION OF SERVICE-LOADS ENVIRONMENT FOR COMMERCIAL VEHICLE BASED ON NON-PARAMETRIC KERNEL DENSITY ESTIMATION METHOD

更新时间：2022-09-22

- RESEARCH ＆ APPLICATION OF SERVICE-LOADS ENVIRONMENT FOR COMMERCIAL VEHICLE BASED ON NON-PARAMETRIC KERNEL DENSITY ESTIMATION METHOD
- Journal of Mechanical Strength Vol. 42, Issue 2, Pages: 443-452(2020)
- 作者机构：
  
  1. 上海理工大学机械工程学院
  2. 上海出版印刷高等专科学校
  3. 上海机动车检测认证技术研究中心有限公司
  4. 上汽集团商用车技术中心
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.02.028
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LUAN ShiJie, YU JiaWei, ZHENG SongLin, et al. RESEARCH ＆ APPLICATION OF SERVICE-LOADS ENVIRONMENT FOR COMMERCIAL VEHICLE BASED ON NON-PARAMETRIC KERNEL DENSITY ESTIMATION METHOD. [J]. 42(2):443-452(2020)
DOI：

LUAN ShiJie, YU JiaWei, ZHENG SongLin, et al. RESEARCH ＆ APPLICATION OF SERVICE-LOADS ENVIRONMENT FOR COMMERCIAL VEHICLE BASED ON NON-PARAMETRIC KERNEL DENSITY ESTIMATION METHOD. [J]. 42(2):443-452(2020) DOI： 10.16579/j.issn.1001.9669.2020.02.028.

摘要

用户使用道路载荷特征的研究与建立是对车辆结构件疲劳强度合理轻量化设计的基础和前提。以往研究方法大多基于参数法概率密度估计对用户使用道路载荷特征进行统计分析。以某型商用车用户使用载荷特征的大范围数据调研为基础,分别采用参数法和非参数核密度估计方法,建立了典型用户使用道路载荷特征的概率密度分布模型,研究表明非参数核密度估计方法较之传统参数法更能准确表征用户使用载荷的分布特征。采用非参数核密度估计方法计算了90%分位下的各项用户使用道路载荷特征,结合实测用户道路载荷谱,基于非参数雨流矩阵外推方法构建了该型商用车减震弹簧应变的全寿命周期载荷,并依此载荷制定了台架疲劳试验规范。研究方法为其他结构件的用户关联疲劳试验规范的合理制定提供了一定的参考。

Abstract

Research and establishment of customer service road-load characteristics are foundation and precondition for reasonable lightweight design of automotive structure strength. Traditionally method mostly based on parametric probability density estimation method to analyze statistical characteristics of customer service road-load. Based on large-scale data research of customer service road-load characteristics of a commercial vehicle,parametric and non-parametric method were respectively applied to study the probability density distribution model of typical customer service road-load characteristics. The results showed that the non-parametric method describe the customer service road-load characteristics more accurately than the parametric method. Therefore,the non-parametric method was applied to calculate the 90 th percentile of customer service characteristics. By applying non-parametric rain-flow matrix extrapolation method,the whole service life loads of shock absorber spring were estimated based on collected road loads data,and fatigue-testing specification was established. The results can provide reference for establishing the automotive structure fatigue testing specifications reasonably under the concept of user-association.

关键词

用户使用载荷特征核密度估计雨流矩阵外推

Keywords

Customer service road-load characteristicsKernel density estimationRain-flow matrix extrapolation

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