Dynamic response analysis method for multistage gear transmission system under different types of cracks

The invention discloses a multi-stage gear transmission system dynamic response analysis method under different types of cracks, a finite element method is adopted to establish a crack-considered multi-stage parallel shaft gear transmission system dynamic model, a Newmark time domain integration method is utilized to solve the dynamic response of the system, and the multi-stage parallel shaft gear transmission system (gears, gears, gears, gears, gears, gears and gears) is discussed. And analyzing the time domain and the frequency domain of the vibration acceleration of each stage of gear under the action of the single-stage crack and the multi-stage crack so as to obtain the vibration result of each stage of system under the single-stage crack and the multi-stage crack. In order to further analyze the vibration acceleration difference of each stage of gear of the multi-stage gear transmission system under single-stage cracks and multi-stage cracks, statistical indexes are analyzed, so that the cross-stage inf