Abstract: Hard coating is a kind of damping structure can effectively restrain harmful vibration of engine blade, and its dynamic research is of paramount significance for the design and optimization of composite structure. The dynamic model of engine blade-hard coating damping structure under high temperature environment is discussed, and conducts dynamic analysis on it to study the dynamic characteristics such as inherent frequency, vibration response amplitude, etc. The numerical simulation is adopted to analyze the impact of hard coating and temperature on dynamic characteristics of composite structure. The finite element simulation is adopted for verification of results to conclude that the hard coating can reduce vibration of engine blade, which is still effective under high temperature environment.

Key words: high temperature environment, engine blade, hard coating, dynamic model