Abstract: The nonlinear oscillating boundary element method on the oscillating fluid mechanics theorem is presented for the flow structure vibration reliability prediction of turbo machine. The method includes the nonlinear oscillating mathematics model of the flow induced the vibration of the structure, the direct solution of the nonlinear oscillating boundary integral numerical equations and the algorithm of the fluid structure vibration reliability prediction. The numerical example for the structure reliability prediction of the turbine blade shows that the method is fast and effective. The method can be developed for flow structure stability assessment and the flow induced vibration analysis of pipe system in chemical process and power engineering.

Key words: Boundary element method, Fluid vibration, Reliability prediction, Turbo machine