ANALYSIS ON THE VIBRATION CHARACTERISTIC OF TAIL GAS TURBINE BLADES BASED ON ANSYS[1] Zhang Jiacan , Ji Jiang （ SINOPEC Engineering Incorporation ,Beijing , 100101） Abstract： In this paper, the 3D solid modeling and modal analysis of the rotary blades of the newly developed tail gas turbine are made by using ANSYS software. Through calculation, the static natural frequency in static state of the blades and the dynamic natural frequency under working conditions are obtained.