Jeong W., Kang Y., Kim S.

FRF-Based Substructuring method and Transfer Path Analysis were applied to the prediction of interior noise in passenger vehicle system. The FBS method is widely applied to product development in various fields since this method can predict the response of the whole system when a part of the system is changed. Especially, the FBS method is very useful to predict the vehicle NVH characteristics in case of changing some parts of the vehicle. Target parts can be established on the basis of test models and FE models of the prototype constructed in the planning stage of car development. This study focused on the application of FBS method to predict vehicle NVH characteristics. First, the test based FBS method was applied to vehicle subframe and vehicle body. The test-based model was then replaced with FE model to apply hybrid FBS method. When FBS method is applied, the connection property of substructures is considered. The vibro-acoustic transfer function was predicted with hybrid FBS method. This predicted vibro-acoustic transfer functions were applied to experimental TPA to predict operational interior noise in vehicle system.