Gearbox is widely used in industrial and military applications. Due to high service load,
harsh operating conditions or inevitable fatigue, faults may develop in gears. If the gear …

Dynamic characteristics of cracked gear systems, also known as cracked-gear rotor systems,
have received increasing interests among industry and academy in the past two decades …

Based on the finite element theory and the loaded tooth contact analysis, an analytical-finite-
element model considering the complex foundation types and the crack propagation paths is …

Gears are prone to failures, which are difficult to detect in the early stage. In this study, the
time-varying mesh stiffness of gears teeth with different crack lengths is calculated, and the …

Time-varying mesh stiffness is one of the main internal excitations of gear dynamics. With
the growth of gear tooth fault, like pitting, cracking and spalling, the mesh stiffness amplitude …

Accurate identification of faults in gearbox requires a clear understanding of its vibration
response. In this study, through establishing dynamic model and experimental observation …

Machinery fault diagnosis has progressed over the past decades with the evolution of
machineries in terms of complexity and scale. High-value machineries require condition …

The gear foundation is commonly assumed to be a rigid body in analyzing the dynamic
characteristics of the gear system. This modeling approach may not be appropriate for …

Based on our previous work (Ma et al., 2014, Engineering Failure Analysis, 44, 179–194),
this paper presents an improved analytical model (IAM) for the time-varying mesh stiffness …

Gear tooth root crack is a typical fault of gear transmissions and it threatens the operation
safety of gear systems. Therefore, precise detection of the tooth root crack is of a great …