Failures usually appeared in inlet channel of certain plane such as skin cracking, rivet loosing and rivet head broking, which are becoming incipient fault of flight safety. Research results showed that the failure is structure vibration fatigue damage caused by pulsating noise pressure in intense noise environment. Application of damping layer can lower the influence of intense noise on skin and rivet. Ground experiment results of engine showed that application of the damping layer has lowered vibration level of the inlet channel skin obviously.
