次声波聚焦技术研究

Research of the Infrasound Wave Focus Technic

次声波和次声武器从上世纪末才开始引起人们的关注和研究,因此次声发射和聚焦技术还处于起步阶段,许多理论和技术难题需要解决。文中在借鉴超声波聚焦技术的基础上,分析了透镜聚焦、曲面自聚焦、相控阵聚焦等三种声波聚焦方法的利与弊,从而选用和设计了次声相控阵聚焦系统。经过阵列参数优化计算和声场仿真,证明用球面相控阵聚焦系统基本能够满足靶区次声强在120dB以上的要求。

The infrasound wave and the infrasound weapon have been aroused people＇s attention and research since last century end, so infrasound emission and focus technology are in the initial step, and there are many puzzles of theory and technology are need to be solved. This paper analyzed the advantage and disadvantage of three sound wave focus methods, that is lens focus, curved autofocus, and phased-array focus on the base of draw lessons from supersonic focus technic, consequently preferred and designed the infrasonic phased-array focus system. Through array parameter optimizing computation and sound field emulation, approved that use the sphere phased-array focus system, can meet primarily the demand that sound intensity of the target is above 120dB.