In order to study the influence of starting position of helicopter on rotor transient aeroelastic response in ship surface flow field

the velocity distribution information of ship surface flow field was simulated by CFD method. Nonlinear quasi-steady aerodynamic model and moderately deformed beam assumption were used in rotor dynamics modeling

and the dynamic equations were solved by combining different starting positions. The results showed that if the starting position of helicopter was closer to the bow and the port side

the negative swing of blade was greater. Within 1 m of the deck center

the maximum negative displacement near the port side of the bow can reach 159% of the rotor radius

while the maximum negative displacement at the center was only 85% of the rotor radius. The vertical airflow gradient near the port side and the bow was obviously higher than that near the starboard side and the stern. The results show that the vertical airflow gradient has a significant effect on the transient aeroelastic response of the rotor. Changing the starting position of helicopter can effectively reduce the transient aeroelastic response of the rotor.