基于CSD/CFD舵面气动力流固耦合仿真分析

空空导弹空气舵面与气动力存在流固耦合作用。采用ANSYS Workbench 14.5对空气舵面与气动力进行了流固耦合仿真分析,研究了攻角和马赫数对舵面振动位移的影响。研究表明,舵面振动位移频率受攻角和马赫数的影响较小,舵面振动位移幅值随攻角和马赫数的增大而增大,并呈非线性关系。低马赫数范围内,飞行速度的变化对舵面振动位移的影响更为明显。攻角为30°,马赫数为3时,舵面振动位移曲线更趋向于等幅振动,舵面趋向于颤振临界状态。

Fluid Solid Coupling Simulation Analysis of Rudder Surface Aerodynamic Based on CSD/CFD

There is fluid solid coupling effect between the aerodynamic force and the air rudder surface of air-to-air missile.ANSYS Workbench 14.5 is used to simulate this fluid solid coupling effect,and the influence of attack angle and Mach number on the vibration displacement of the rudder surface are studied.The simulation results show that,the frequency on the vibration displacement of the rudder surface is less affected by the angle of attack and Mach number,and the amplitude of the vibration displacement of the rudder surface increases with the increase of the attack angle and Mach number,which is nonlinear change.In the low Mach number range,the influence of the change of the flight speed on the vibration displacement of the rudder surface is more obvious.When the angle of attack is 30°and the Mach number is 3,the vibration displacement of rudder surface tends to the equal amplitude vibration and the rudder surface tends to the flutter critical state.