Method for predicting fatigue life of material based on wavelet packet analysis
A wavelet packet analysis and fatigue life technology, which is applied in the direction of applying repetitive force/pulsation force to test the strength of materials, can solve problems such as affecting the life result and stress loss, and achieve the effect of accurate estimation results
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[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0051] Such as figure 1 Shown is a kind of prediction method of material fatigue life based on wavelet packet analysis provided by the present invention, comprises the following steps:
[0052] 1) Establish a sample model of the material, and calculate the stress power spectral density of the dangerous part in the sample model:
[0053] 11) Establish a sample model of the material, and apply an excitation signal to the sample model;
[0054] 12) Convert the excitation signal applied in step 11) into an acceleration frequency domain signal by Fourier transform;
[0055] 13) Calculat...
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