Abstract
To design the vibration performance of a car, it is effective to divide the structure into multiple subsystems. And the kernel Compliance Analysis (kCA) based on the frequency based substructuring is known as an effective analysis method to understand the coupling among plural subsystems. When the kCA is applied to the body shell of a car, there are many degrees of freedom in the coupling region, which makes the analysis difficult. In this paper, we proposed an analytical method and a design guideline for vibration reduction of body shells. In the method, the transmitted forces at the coupling region are expressed using wavenumber spectrum as a simple indicator to quantify the magnitude of vibration transmission. By using the indicator, complex vibration transmission can be understood in terms of the spectrum of transmitted forces in wave number space. This is useful for simplifying and understanding the mechanism of the coupling phenomena and linking them to design guidelines.
