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
姚凌云1,2(
), 杨植顺1,2, 李丽1,2, 林勇杰1,2
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。基金资助:
Lingyun YAO1,2(
), Zhishun YANG1,2, Li LI1,2, Yongjie LIN1,2
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。
中图分类号:
姚凌云, 杨植顺, 李丽, 林勇杰. 基于最优伪维格纳-维尔分布方法的载荷谱编辑研究[J]. 中国机械工程, 2025, 36(11): 2501-2508.
Lingyun YAO, Zhishun YANG, Li LI, Yongjie LIN. Research on Load Spectrum Editing Based on Optimal Pseudo Wigner-Ville Distribution Method[J]. China Mechanical Engineering, 2025, 36(11): 2501-2508.
| 统计参数 | 均值 | 均方根 | 峭度系数 | |
|---|---|---|---|---|
| 原始载荷谱 | 数值 | 1048.5 N | 1547.6 N2 | 6.7803 |
| PWVD编辑谱 | 数值 | 1198.4 N | 1757.2 N2 | 5.7635 |
| 误差 | 14.29% | 13.54% | 15.00 | |
| WVD编辑谱 | 数值 | 1047.5 N | 1619.2 N2 | 5.7633 |
| 误差 | 0.09% | 4.63% | 15.00 | |
| ST编辑谱 | 数值 | 1266.5 N | 1713.1 N2 | 7.7963 |
| 误差 | 20.79% | 10.69% | 14.99 | |
| STFT编辑谱 | 数值 | 1041.4 N | 1616.6 N2 | 5.7363 |
| 误差 | 0.68% | 4.46% | 15.40 | |
表1 统计参数
Tab.1 Statistical parameter
| 统计参数 | 均值 | 均方根 | 峭度系数 | |
|---|---|---|---|---|
| 原始载荷谱 | 数值 | 1048.5 N | 1547.6 N2 | 6.7803 |
| PWVD编辑谱 | 数值 | 1198.4 N | 1757.2 N2 | 5.7635 |
| 误差 | 14.29% | 13.54% | 15.00 | |
| WVD编辑谱 | 数值 | 1047.5 N | 1619.2 N2 | 5.7633 |
| 误差 | 0.09% | 4.63% | 15.00 | |
| ST编辑谱 | 数值 | 1266.5 N | 1713.1 N2 | 7.7963 |
| 误差 | 20.79% | 10.69% | 14.99 | |
| STFT编辑谱 | 数值 | 1041.4 N | 1616.6 N2 | 5.7363 |
| 误差 | 0.68% | 4.46% | 15.40 | |
| 编辑方法 | 通道1 压缩量 | 通道2 压缩量 | 通道3 压缩量 |
|---|---|---|---|
| 最优PWVD编辑法 | 15.54 | 28.21 | 29.37 |
| WVD编辑法 | 15.02 | 15.02 | 15.65 |
| ST编辑法 | 18.31 | 19.15 | 24.92 |
| STFT编辑法 | 15.36 | 15.79 | 19.31 |
表2 压缩效果对比 (%)
Tab.2 Compression effect comparison
| 编辑方法 | 通道1 压缩量 | 通道2 压缩量 | 通道3 压缩量 |
|---|---|---|---|
| 最优PWVD编辑法 | 15.54 | 28.21 | 29.37 |
| WVD编辑法 | 15.02 | 15.02 | 15.65 |
| ST编辑法 | 18.31 | 19.15 | 24.92 |
| STFT编辑法 | 15.36 | 15.79 | 19.31 |
| 单元质量标准 | 雅可比 | 扭曲 | 翘曲 | 最大内角 | 最小内角 |
|---|---|---|---|---|---|
| 检查标准 | ≥0.7 | ≥60° | ≥5° | ≥120° | ≤30° |
| 单元数 | 0 | 0 | 1617 | 0 | 0 |
| 不合格比例/% | 0 | 0 | 3 | 0 | 0 |
表3 网格质量表
Tab.3 Mesh quality table
| 单元质量标准 | 雅可比 | 扭曲 | 翘曲 | 最大内角 | 最小内角 |
|---|---|---|---|---|---|
| 检查标准 | ≥0.7 | ≥60° | ≥5° | ≥120° | ≤30° |
| 单元数 | 0 | 0 | 1617 | 0 | 0 |
| 不合格比例/% | 0 | 0 | 3 | 0 | 0 |
| 原始载荷谱 | PWVD编辑谱 | WVD编辑谱 | S变换编辑谱 | STFT编辑谱 | |
|---|---|---|---|---|---|
| 循环次数/105 | 3.682 | 3.682 | 3.682 | 3.682 | 3.682 |
| 误差/10-4 | 0 | 0 | 0 | 0 |
表4 前桥疲劳仿真结果
Tab.4 Front axle fatigue simulation results
| 原始载荷谱 | PWVD编辑谱 | WVD编辑谱 | S变换编辑谱 | STFT编辑谱 | |
|---|---|---|---|---|---|
| 循环次数/105 | 3.682 | 3.682 | 3.682 | 3.682 | 3.682 |
| 误差/10-4 | 0 | 0 | 0 | 0 |
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