中国机械工程 ›› 2025, Vol. 36 ›› Issue (11): 2501-2508.DOI: 10.3969/j.issn.1004-132X.2025.11.004

• 机械基础工程 • 上一篇    

基于最优伪维格纳-维尔分布方法的载荷谱编辑研究

姚凌云1,2(), 杨植顺1,2, 李丽1,2, 林勇杰1,2   

  1. 1.西南大学工程技术学院, 重庆, 400715
    2.丘陵山区农业装备重庆市重点实验室, 重庆, 400715
  • 收稿日期:2024-11-04 出版日期:2025-11-25 发布日期:2025-12-09
  • 通讯作者: 姚凌云
  • 作者简介:姚凌云*(通信作者),男,1983年生,教授、博士研究生导师。研究方向为振动噪声控制、汽车CAE技术。发表论文30余篇。E-mail:lingyunyao@swu.edu.cn
    第一联系人:刘秀梅,女,1982年生,教授。研究方向为流体传动与控制、智能悬架及控制。E-mail:liuxm@cumt.edu.cn。罗云龙*(通信作者),男,2001年生,硕士研究生。研究方向为流体传动与控制。E-mail:19852493832@163.com
  • 基金资助:
    国家自然科学基金(52175121)

Research on Load Spectrum Editing Based on Optimal Pseudo Wigner-Ville Distribution Method

Lingyun YAO1,2(), Zhishun YANG1,2, Li LI1,2, Yongjie LIN1,2   

  1. 1.College of Engineering and Technology,Southwest University,Chongging,400715
    2.Chongging Key Laboratory of Agricultural Equipment in Hilly and Mountainous Areas,Chongqing,400715
  • Received:2024-11-04 Online:2025-11-25 Published:2025-12-09
  • Contact: Lingyun YAO

摘要:

为提高载荷谱编辑的质量,研究利用伪维格纳-维尔分布(PWVD)方法编辑载荷谱。根据最小聚集性度量参数原理确定载荷谱的最优PWVD矩阵,计算载荷谱的瞬时能量分布并以此为依据删除小损伤载荷,生成压缩后的载荷谱。研究结果表明,基于最优PWVD方法编辑后的载荷谱在统计参数、功率谱密度、雨流计数和疲劳仿真等方面与原始载荷谱计算结果一致,车辆安装点最大载荷力方向(Y向)载荷经PWVD、维格纳-维尔分布(WVD)、S变换和短时傅里叶变换这4种方法编辑后谱的压缩量分别为28.21%、15.02%、19.15%、15.79%,使用编辑后的载荷谱预测寿命与原始载荷谱预测结果相同,因此,利用最优PWVD编辑载荷谱的方法在加速车辆零部件疲劳耐久分析中具有应用潜力。

关键词: 载荷谱编辑, 时频变换, 伪维格纳-维尔分布, 疲劳分析

Abstract:

To improve the quality of load spectrum editing, this paper utilized the PWVD method to edit the load spectrums. According to the principle of the minimum clustering metric parameter, the optimal PWVD matrix for the load spectrum was determined, and the instantaneous energy distributions of the load spectrums were calculated, which was used to delete small damage loads and generate a compressed load spectrum. The results show that the edited load spectrum based on the optimal PWVD method is consistent with the original load spectrum calculation results in terms of statistical parameters, power spectral density, rain flow count and fatigue simulation. The compressions of the load spectrum(Y⁃direction) edited by PWVD, Wigner-Ville distribution(WVD), S transform and short time Fourier transform are as 28.21%, 15.02%, 19.15% and 15.79%, respectively. The predicted life of the edited load spectrum is the same as that of the original load. Therefore, the method of utilizing the optimal PWVD to edit the load spectrum has the potential for applications in accelerating the fatigue durability analysis of vehicle components.

Key words: load spectrum editing, time-frequency conversion, pseudo Wigner-Ville distribution(PWVD), fatigue analysis

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