An important performance characteristic of automotive transmissions is their noise behavior. Methods for simulating and optimizing the emitted rattle and whine noises are presented within this paper, with the focus being on the emitted structure-borne noise. The simulations are based on elastic multi-body models. Simulation methods for gear wheels, synchronizers, plain and rolling bearings are presented; in doing so, the lubrication fluid film at these contacts is considered in addition to material stiffness. Therefore, an evaluation of lubrication conditions is possible. A comparison with measurements is done to validate the methods. Afterwards, noise reduction measures are shown; they comprise the insertion of housing structures with damping effects or the application of special damping and decoupling measures. The measures are investigated, both simulatively and experimentally. Some of the simulations are done with a complete dual clutch transmission in order to show the practical suitability of the methods developed for simulating complex transmission systems.
展开▼
