The flow-induced vibration will cause structure damage and failure for heat exchanger. By taking the tubular gas-gas heat exchanger vibration in an ultra-supercritical 660 MW coal-fired generator unit as an example

the vibration modes of multi-span U-fin tube and tubular gas-gas heat exchanger were analyzed by ANSYS finite element analysis method

and the natural frequency of the heat exchange tube bundle was calculated. The effects of vortex shedding

turbulent buffeting and acoustic resonance on the vibration of tubular gas-gas heat exchanger were analyzed. The results indicate that

the acoustic resonance induced by vortex shedding or turbulent buffeting is the root cause of the tubular gas-gas heat exchanger vibration. On this basis

the corresponding vibration control method is put forward

and the effective vibration elimination effect is achieved in practical engineering.