Bump extraction algorithm for variable amplitude fatigue loading

被引：65

作者：

Abdullah, S. ^{[1
]}

Choi, J. C.

Giacomin, J. A.

Yates, J. R.

机构：

[1] Univ Kebangsaan Malaysia, Dept Mech & Mat Engn, Bangi 43600, Malaysia

[2] Hyundai Motor Co, Kyonggi Do, South Korea

[3] Univ Sheffield, Dept Mech Engn, Sheffield, S Yorkshire, England

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2006年 / 28卷 / 07期

关键词：

fatigue data editing; mission; wavelet; bump; variable amplitude;

D O I：

10.1016/j.ijfatigue.2005.09.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper presents the development of a fatigue mission synthesis algorithm, called Wavelet Bump Extraction (WBE), for summarising long records of fatigue road load data. This algorithm is used to extract fatigue damaging events or bumps in the record that cause the majority of the fatigue damage, whilst preserving the load cycle sequences. Bumps are identified from characteristic frequency bands in the load spectrum using the 12th order Daubechies wavelet. The bumps are combined to produce a mission signal which has equivalent signal statistics and fatigue damage to the original signal. The WBE accuracy has been evaluated by observing the cycle sequence effects of the bump loadings. The WBE was compared with the time domain fatigue data editing method, so that the effectiveness of WBE can be verified. Using WBE, a substantial compression of the load-time history could be achieved for the purpose of accelerated fatigue tests in the automotive industry. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：675 / 691

页数：17

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