Abstract: The vibration of thin cambered blade is investigated based on temperature analogy. The fluid flow equations using arbitrary Lagrange-Euler approach are solved by characteristic based method. In every time step, temperature analogy is used to create the dynamic meshes. The displacement of the moving boundary is considered as temperature boundary conditions, the internal node displacement is obtained by solving heat conduction equation. Numerical results show the occurrence of lock-in zone at the working attack angle. The patterns of vortex shedding and the probability of self-excited vibration are also investigated. And as a supplement, lock-in zone of different attach angle is predicted by numerical simulation which is not given in the experiment result.

Key words: Characteristic equation, Lock-in zone, Self-excited vibration, Split method, Temperature analogy, Vortex shedding