Estimation method for vehicle interior noise and vibration contribution estimation by Operational and Component TPA - Basic consideration employing simple vehicle model -

Abstract

An analytical method was considered for estimating vehicle interior noise and vibration and identifying main contributors in case the power source is replaced by combining operational (OTPA) and component transfer path analysis (CTPA) methods. A simple vehicle model equipped with motor and small test bench was prepared for the basic consideration in this study. In the method, OTPA and CTPA were applied to the simple vehicle model in the following three steps. In the first step, OTPA was applied to the vehicle model at the operational condition to obtain the contribution and the transfer functions from the vibration at multiple reference points to the response point. In the second steps, CTPA was applied to another motor on the test bench to obtain the blocked force. Subsequently, the reference point (motor attachment point) vibration on the vehicle model was estimated by using the blocked force and the transfer function in case the motor was replaced on the vehicle model. Finally, the estimated reference point vibration was integrated into OTPA model, and the response point vibration was calculated. 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 attachment point was also indicated correctly.

Keywords

• transfer path analysis
• operational tpa
• component tpa
• blocked force
• motor vibration