Vibration response analysis method for spiral bevel gear with crack fault

The invention discloses a vibration response analysis method for a spiral bevel gear with a crack fault, and the method comprises the steps: obtaining spiral bevel gear parameters and tooth root crack fault parameters; the spiral bevel gear is sliced at equal intervals in the tooth width direction, and parameters of gear slicing are obtained; determining meshing states of the gear slices under different rotation angles, and calculating a relation among a meshing range, a meshing position and the rotation angles of the gear slices; a potential energy method is adopted to establish a single spiral bevel gear crack meshing stiffness calculation model and solve the model, and then the gear time-varying meshing stiffness under the spiral bevel gear crack fault is obtained; and establishing a kinetic model under the spiral bevel gear crack fault by adopting a lumped parameter method, and solving the kinetic model to obtain vibration response characteristics under the spiral bevel gear crack fault. The method has th