Abstract: To solve the problem of turbine stator rub and even serious accident arising from the excitation resonance， frequency modulation excitation of a simulated turbine impeller was carried out based on the resonance principle. An experimental analytic approach is presented by arranging fine sand on impeller to simulate the vibration mode of impeller. Comparing with the finite element calculation， the results show that this experimental method can intuitively and accurately reflect the vibration of simulated turbine impeller. It may provide technical support and experiment basis for the vibration characteristic analysis and manufacturing process of the roulette system.

Key words: impeller vibration type, modal analysis, resonance method, finite element analysis, vibration type test