Nonlinear dynamic model of gear transmission system under the influence of vibration and noise

For gear pairs, there will be nonlinear factors such as time-varying meshing stiffness, tooth backlash and meshing error in gear meshing, which will affect the dynamic behavior of the system and make it appear complex nonlinear vibration. Long-term non-linear vibration will cause fatigue, wear and even cracks in the system, which will greatly reduce the reliability and stability of the system. Therefore, studying the nonlinear dynamic model of the gear transmission system has important theoretical and practical significance for the vibration control and noise reduction of the generator gearbox. On this basis, this paper studies the nonlinear dynamic model of the gear transmission system under the action of vibration and noise. In this paper, the dynamic characteristics of gears and the basic theory of gear modification are deeply studied. In this paper, a nonlinear dynamics model of the torsion coupled gear transmission is established. The influence of nonlinear factors such as time-varying meshing stiffness, transmission error and torsional deformation of the transmission shaft on the gear meshing vibration is analyzed, thereby greatly reducing the noise generated by the gear transmission system vibration. The results show that there are many noises in the gear transmission system. The frequency vibration factors in the system are analyzed, and the mechanism of vibration and noise or various nonlinear factors under different loads is analyzed, which has important theoretical significance for controlling the vibration and noise of gears.