不同速度导弹的声辐射特性研究

根据悬浮子弹药对导弹的末端拦截所需的起爆激励条件,研究了导弹飞行过程中的声辐射特性。利用COMSOL Multiphysics多物理场仿真软件对亚声速、跨声速和超声速3种速度等级导弹飞行过程中的表面脉动压力进行了仿真,得到了导弹周围的压力分布及其表面最大脉动压力随速度的变化关系。依据气动声学的声学相似理论对亚声速导弹所产生的声场进行了仿真,分析了该辐射声场中各参量的变化。结果表明:高频单色波可以作为悬浮子弹药激爆检测信号,研究结果可应用于悬浮子弹药声光激爆机制的设计。

Study on Acoustic Radiation Characteristics ofMissiles With Different Velocities

According to the detonation excitation conditions required for the suspension bullet to intercept the missile at the flight terminal,the characteristics of acoustic radiation during missile flight were studied. The surface pulsating pressure of missile during the flight of subsonic,transonic and supersonic was simulated by the COMSOL Multiphysics. The pressure distribution around the missile was obtained as well as the relationship between the maximum surface pulsating pressure and velocity. According to the acoustic similarity theory of aeroacoustics,the sound field generated by a subsonic missile was simulated,and the parameters in the radiated sound field were analyzed. The result shows that the high frequency monochromatic wave can be used as the detection signal of the detonation of suspension bullet. The research can be applied to the design of the acousto-optic detonation mechanism of suspension bullet.