A mesh cycle is defined as the amount of gear rotation after which the next tooth takes the position of the first one. We then perform a stationary parametric analysis to determine the mesh stiffness of the gears for different positions in a mesh cycle. To examine gear mesh stiffness, we assume that the gears are elastic bodies and model the contact between them. Evaluating Gear Mesh Stiffness Using Static Contact Analysis Therefore, it is crucial to evaluate gear mesh stiffness and include it in the gear model. These vibrations in different parts of the transmission system result in noise radiation.
This makes the problem nonlinear, and the continuously varying gear mesh stiffness gives rise to vibrations in the system. Gear mesh stiffness depends on several different parameters and, most importantly, it varies with the gear rotation. Hence, accounting for the stiffness of the gear mesh is important when trying to accurately capture the dynamics and vibrations in the system. Compared to the gear’s core region, the gear’s mesh region is more flexible. This is why the teeth of one gear are inserted between the teeth of the mating gear, a process referred to as gear meshing. The main purpose behind gears is to avoid slippage. Gear pair created using the Parts Library in the Multibody Dynamics Module. To overcome this limitation, people began using toothed wheels, more commonly known nowadays as cogwheels or gears. The major drawback in using these frictional wheels was the slippage beyond a certain torque value, as the maximum torque that could be transmitted was limited by the frictional torque. Today, we’ll explain why it’s important to account for gear mesh elasticity as well as how to compute and include gear mesh stiffness in your multibody dynamics model.īefore the invention of gears, people used wheels to transfer the rotation of one shaft to another with the help of friction. To help you create an accurate gear simulation, new features and functionality in the COMSOL Multiphysics® software enable you to evaluate gear mesh stiffness. When performing a noise, vibration, and harshness (NVH) analysis of a transmission system, the elasticity of the gear mesh plays a crucial role in obtaining useful results.
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