Investigation on the influence of heat on the dynamic characteristics of a gear transmission system

摘要

In order to study the influence of heat on dynamic characteristics of gear transmission system, the meshing thermal stiffness of gear was proposed, and it was introduced into the system dynamics equation. Meanwhile, the equivalent viscous damping of the system was studied by using the Coulomb friction damping model. Thus, the thermal dynamics model of system was established. In this article, the thermal dynamics model of gear system was established and solved. The comparative analysis of the thermal dynamic response and elastic dynamic response of the system was also provided. The results show that the maximum peak value, vibration velocity, and equilibrium position of thermal dynamic response are all bigger than those of the elastic dynamic response. The maximum dynamic load is found at the alternating point of double teeth region to single tooth region, and the maximum thermal dynamic load and thermal dynamic load coefficient are smaller than those of the elastic system because of the increases of the equivalent viscous damping. Additionally, the theoretical model is verified by finite element method and experimental method, respectively.