Gear Shift Investigation Using Virtual Prototype

Abstract

The presented paper deals with the prediction of vibroacoustic behaviour of heavy-duty transmission concept by application of virtual prototype. The methodology was developed by a combination of both, numerical and experimental approaches on single-stage gearbox. The results from both approaches were compared to validate computational simulation for the purpose to use numerical model for assembly with a higher level of complexity. The whole methodology is applied to heavy-duty transmission concept. For the purpose of easy application to different gearbox concept, the more complex model is written as open code. This enables to include gear shift option tuning, which can significantly affect vehicle comfort. This paper is mainly focused on the investigation of different gear shift process influence the surface normal velocity which is evaluated on the gearbox housing and is related to acoustic behaviour. The different combination of clutch activation and deactivation profile at different torque is investigated and evaluated by the surface normal velocity at most sensitive locations. Based on the results, the multibody model can be used at designing and optimization phase from the vibroacoustic point of view.