Modeling Vibration and Noise in a Gearbox
Application ID: 47841
A gearbox is used to transfer power from an engine to its associated wheels or cogs, which can result in radiating noise to the surroundings. This is due to the transmission of undesired lateral and axial forces on the bearings and housing, while transmitting power from one shaft to the other, as well as the vibrations of flexible components, such as the gear meshes, bearings, and housing. By simulating and predicting the vibration and noise radiation from a gearbox, designers can gain insight early in the design process.
This tutorial illustrates the modeling of vibration and noise in a 5-speed synchromesh gearbox of a manual-transmission vehicle. A transient multibody analysis is performed to compute the gearbox vibration for the specified engine speed and external load. The normal acceleration of the gearbox housing is converted to the frequency domain and used as a source of noise. An acoustics analysis is then performed in order to compute the sound pressure levels in the near, far, and exterior fields.
Learn more about this tutorial model in a related blog post: "How to Model Gearbox Vibration and Noise in COMSOL Multiphysics®".
This application example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
- COMSOL Multiphysics® and
- Acoustics Module and
- CAD Import Module and
- Multibody Dynamics Module and
- Structural Mechanics Module
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.