Prediction of vibration response for vehicle panel considering variation of vibrational input power using SEA

Abstract

The authors developed the structural design process on the basis of experimental SEA for reducing structure-borne sound. Sensitivity analysis based on the perturbation method was proposed to predict the vibration energy or the sound energy at the evaluation point or subsystem, however, it was difficult to predict them accurately in order not to predict the variation of vibration input power by structural modification. So, the new method with considering the variation of vibration input power was verified through the simple structure like L-shaped plate in the real world experiment. As a result, it can be seen that the values of vibration and sound energy without using the vibration input power for structural modification were overestimated. In this paper, a partial car model with two beam subsystems and five panel subsystems is investigated by FEM analysis.