Abstract
Abstract:
Automotive engineers use modelling, simulation and testing to reduce powertrain vibration. This is especially important in passenger vehicles for comfortable ride. This paper provides an outline for methodologies behind this work, from developing mathematical models, to simulation and experimental verification. Modelling is demonstrated using torsional finite elements for direct, branched and grounded (boundary) connections and geared connections. The use of these elements for developing dynamic models of various passenger vehicle powertrains is illustrated and discussed. A six degree of freedom dynamic model for clutch engagement is used to demonstrate numerical simulations for transient vibration from clutch engagement stick-slip and gear backlash. A powertrain test rig that is used for measuring torsional vibration is presented. Test methods used to verify models and analysis are discussed for free vibration, steady state and transient response.