Abstract
The tooth surface wear is a common and inevitable gear fault, even becoming a life-determining factor. In order to monitor the tooth wear state and reveal the dynamic properties of the tooth surface wear, we incorporate the influence of the tooth wear into the gear mesh stiffness. Time-varying mesh stiffness is one of the main vibration sources of the gear transmission system. The potential energy method is used to calculate the mesh stiffness of parallel-axis gear system with wear fault. This study calculates the static surface wear and evaluates the influence of tooth gear wear on the mesh stiffness. Finally, the reduction of mesh stiffness is quantificationally evaluated when the surface wear occurs in external spur gear.
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