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Technical Paper

Application of Flexible Multi Body Dynamics (MBD) and Finite Element Analysis (FEA) for Powertrain Induced NVH Development of a Vehicle

2011-01-19
2011-26-0016
Control of powertrain radiated noise and of excitations induced by the Powertrain through the mounts are key aspects towards designing the Powertrain induced NVH performance of a vehicle. During the concept, as well as later stages of Powertrain development, use of simulation tools for MBD, FEA and Vibro-Acoustics can help to evaluate and lead the Powertrain design decisions. In the present work, the flexible MBD software packages, AVL-Excite and MSC-NASTRAN, have been used to predict upstream mount vibrations and surface vibrations of the Powertrain structure. The radiated sound pressure was predicted using LMS Virtual Lab software. In MBD simulation of the Powertrain, the linear elastic Powertrain components (Crankcase, Cranktrain, Drivetrain, etc.) were FE modeled and condensed using MSC-NASTRAN; condensed linear elastic Powertrain components were then connected by means of non-linear joints at the bearing locations.
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