基于最优伪维格纳-维尔分布方法的载荷谱编辑研究

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关键词：载荷谱编辑；时频变换；伪维格纳-维尔分布；疲劳分析

中图分类号：U467.14

DOI：10.3969/j.issn.1004-132X.2025.11.004

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 smalldamage 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-Vill distribution（WVD），S transform and short time Fourier transform are as 28. 21% （20 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

0 引言

车辆零部件的耐久性分析是确保车辆在长期使用中保持性能和安全性的重要环节。（剩余11642字）