Treatment and contrast verification of meshing stiffness in dynamic model of helical gear

In order to establish of dynamic model an accurate of helical gear, and investigate vibration characteristics of helical gear system, a meshing stiffness calculation method was put forward based on the analysis of teeth contact under load and the consideration of shaft torsional deformation. The dynamics models of helical gear built according to the decomposition of meshing stiffness in major domestic literatures, were inspected and some violation against theoretical mechanics was pointed out. Resolving forces and vibration displacements, a helical gear vibration model was established considering the meshing stiffness excitation and the corner mesh impact excitation. Taking some helical gear transmission system as an example, the results indicate that the method based on the analysisi of teeth contact under load can easily and accurately calculate the teeth meshing stiffness. The dynamic responses calculated in a certain literature are significantly different from the actual results. The results by the method of resolving forces and vibration displacements are in good agreement with the theoretical ones.