Comparison of Two Possible Dynamic Models for Gear Dynamic Analysis

Several gear dynamics models are available in the literature, each with its unique application. In this chapter, a comparison between two models will be discussed. While the source of excitation in both models will come from the time-varying mesh stiffness caused by the static transmission error, the first model aims to estimate the dynamic overloads due to the meshing with a simple one-dimensional approach, neglecting other flexibilities. The second one instead includes the flexibilities of the shafts as well as bearings and the gearbox housing, with the possibility of being extended to multistage transmissions. Both models are quick and can give useful insight in the design process of a geared transmission. A simple test case will be detailed highlighting the different capabilities of the models and providing several key results such as dynamic forces and displacements which can help designers to define better components.