Transfer path analysis of structural vibration on propulsion motor

As the main source of ship propulsion motor, reduce the vibration noise is of great significance for improving the acoustic stealth performance of ships . Establish motor feet vibration transfer path analysis model to determine the primary excitation source and transfer path; Hammering method is used to test the transfer function of the path, and collect the response of reference point and target point on operation condition; Transfer path analysis based on experiment, and then identify equivalent exciting force and calculating path contribution amount . The results show that in the frequency range of 1~1000Hz, the vibration acceleration level error of the synthetic response and measured response is about 3dB, the model is accurate and reliable; Recognized equivalent excitation force can be used for simulation of excitation load, contribution analysis results indicate the direction for structural improvements, which have practical value.