Experimental and Computational Simulation Approaches for Engine Mounting Development and Certification 2000-01-3239

The Noise and Vibration Harshness (NVH) quality is an important customer and benchmark requirement in automotive industry products. The NVH improvement, applied in new projects, is a compromise of cost, performance and time to launch new products. The later trend has been minimized with efforts of computational simulation in the design verification phase. A precise method used for the determination of mass, center of gravity and rotational inertia, allows the engineer to simulate virtual arrangement of mounts before building prototypes. This dynamic simulation of the power train assembly extracts the first six natural frequencies and could be used for mode decoupling. All this systematic evaluations must comply with customers and design requirements. This paper describes the steps of mounting mechanical properties determination and summarizes the main tests used for evaluation of durability, certification and NVH characteristics.