Abstract:In order to verify the damping effect of the wine-mounted engine pylon structure design, we must analyze the structural dynamics of the engine pylon. This paper builds an equivalent model of engine pylon by the finite element software ANSYS. The top ten non-zero modals of the pylon are calculated. The damping characteristics of the pylon is analyzed in three typical conditions (takeoff, cruise, flight idle), and the relationship between the damping effect of the pylon and the dynamic stiffness is researched. The results show that the engine pylon design achieves good damping effect, however, due to the dynamic stiffness of the pylon increases with the exciting force frequency’s increment, the high-frequency damping effect is slightly reduced.