Estimation Method for Vehicle Interior Noise and Vibration Contribution Estimation by Operational and Component TPA

Abstract

In this study, we proposed a method to estimate vehicle interior noise and vibration and identify the main contributing point efficiently by combining operational (OTPA) and component transfer path analysis (CTPA) methods. In the method, OTPA and CTPA were applied in the following three steps. In the first step, OTPA was applied to a vehicle model at the operational condition to obtain the contribution and transfer function from reference points to response point. In the second step, CTPA was applied to another motor placed on a test bench to obtain blocked force and estimate the reference point vibration on the vehicle model. Finally, the estimated reference point vibration was integrated into OTPA model, and the response point vibration was estimated in case the motor on the test bench was replaced to the vehicle model. Through the simple verification test using the vehicle model and test bench, the response point vibration was observed to be estimated accurately by the method. In addition, the high contributing motor mount point was also indicated correctly.