Research on the Scope of Spectral Width Parameter of Frequency Domain Methods in Random Fatigue
Research on the Scope of Spectral Width Parameter of Frequency Domain Methods in Random Fatigue
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DOI：
10.3390/app10144715
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发表时间：
2020-07-01
影响因子：
2.7
通讯作者：
Lacidogna, Giuseppe
中科院分区：
文献类型：
--
作者：
Xu, Jie;Zhang, Yaolei;Lacidogna, Giuseppe
在目前的疲劳寿命计算理论中，最常用的方法是频域法。然而，大多数频域疲劳寿命预测模型并未指明谱宽参数的适用范围。不同的频域方法对谱宽参数有严格的适用性，模型选择不当会导致较大的误差。因此，确定不同频域方法的谱宽参数的适用范围就显得尤为重要。本文首先介绍了目前的频域方法，然后对模拟频谱进行了仿真，并选择了三种材料在不同频域方法下进行了比较。通过对随机疲劳寿命计算结果与相对误差结果的分析比较，得出了不同频域方法的应用，并结合工程实例进行了随机振动仿真验证，可为寿命预测模型的选择提供参考。
In the current fatigue life calculation theory, the most commonly used method is the frequency domain method. However, most of the frequency domain fatigue life prediction models do not indicate the scope of the application of the spectral width parameter. Different frequency domain methods have strict applicability to the spectral width parameter, and improper model selection will lead significant error. Therefore, it is particularly important to determine the scope of application of the spectral width parameter for different frequency-domain methods. This paper firstly introduces the current frequency domain methods, then simulates the analogue spectrum and selects three materials for comparison in the different frequency-domain methods. By analyzing and comparing the results of random fatigue life and relative error results, the application of different frequency-domain methods is obtained, and random vibration simulation verification is carried out with the practical engineering example, which can provide a reference for the selection of life prediction models.