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Rapid prediction method of aerodynamic noise fatigue life based on modal stress approach
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Rapid prediction method of aerodynamic noise fatigue life based on modal stress approach
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Journal Article
Rapid prediction method of aerodynamic noise fatigue life based on modal stress approach
2025
Overview
Hypersonic vehicles are subjected to intense aerodynamic noise loads during service, and noise fatigue life assessment is of great significance in the design stage. Aerodynamic noise load is essentially a broadband random excitation, and its fatigue life assessment mainly consists of three core modules: the compilation of the noise load spectrum, the analysis of random vibration response, and the calculation of structural fatigue damage. In order to improve the computational efficiency and strengthen the correlation between the analysis steps, this study develops a set of computational procedures based on Python programming language, which realizes the integrated and rapid processing of the fatigue life assessment of aerodynamic noise. In terms of the calculation method, a fatigue hotspot localization method based on the modal stress approach is proposed, and the modal contribution coefficient is introduced to narrow the selection range of fatigue hotspots and improve the calculation efficiency. Taking a typical stiffened plate as an example, the new method is demonstrated to have high accuracy in locating fatigue hotspots, as well as the computational program has high accuracy in fatigue life estimation. This method can significantly reduce the calculation time and storage space, and improve the utilization efficiency of resources.
Publisher
IOP Publishing
Subject
/ Python
