齿轮传动系统建模与典型界面传递特性研究

With the development of vehicle gear transmission system towards high speed，heavy load and high power，the structure is becoming more and more complex，and the operating conditions are variable，easy to cause damage and failure of parts and components，which affects the reliability of the system. Establishing an accu⁃ rate gear transmission system model and studying the change law of the transfer characteristics of typical interface are the key technical basis for system fault detection and location. This paper comprehensively considers the key in⁃ fluencing factors such as the gear time-varying meshing stiffness，meshing damping，tooth clearance and bearing support stiffness，establishes a nonlinear dynamic model of the fixed shaft gear transmission system，and conducts vibration characteristics tests，effectively verifying the accuracy of gear transmission dynamics model. For the gear-meshing interface and bearing interface，a typical interface force model is constructed，and the transfer characteris⁃ tics are quantitatively characterized by the attenuation coefficient of vibration signal transfer. The simulation and ex⁃ perimental research on typical interface vibration transfer are carried out to reveal the essential law of vibration sig⁃ nal transfer in the gear transmission system，which provides a powerful theoretical and technical support for the lay⁃ out of sensor measuring points in the fault detection of vehicle gear transmission system.