A new method for calculating time-varying mesh stiffness (TVMS) has been proposed. This method takes into account the coupling effect between each sliced spur gear on the basis of the traditional slicing method, and accurately calculates the time-varying meshing stiffness of the helical gear. By comparing the calculation results with finite element method and traditional slicing method, the correctness of the proposed method is proven. Subsequently, to investigate the impact of cracks on the gear system, 10 cracks with different parameters were set up, and the variation trends of six statistical indicators such as kurtosis were studied under different degrees of crack propagation. The results showed that kurtosis is more sensitive to crack propagation in helical gears.
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Tong et al. (2024) studied this question.
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