【摘要】 对空气中快速运动声源激发的水下声信号建模和仿真,对于水下探测空气中运动声源有非常重要的意义。针对空气中快速运动声源激发的水下声信号仿真问题,该文从波动理论出发,给出一种快速仿真方法。该方法通过修改常用的快速场声传播模型,可对声源运动轨迹通过接收器正上方时的水下接收信号进行仿真,该方法具有实现简单、计算速度快的优点。用该方法对空气中快速运动声源激发的水下声信号进行了仿真计算。结果表明:空气中高速运动声源激发的浅海水下声信号有快速的幅度起伏,大的频移,且信号频谱出现多峰特性。更多还原

【Abstract】 It is very important to model and simulate the underwater acoustic signal excited by airborne rapidly moving source,for detecting airborne sound target underwater.This paper presented a new signal simulation method,which can simulate the received signal in shallow water excited by airborne rapid moving source.This method is derived from wave theory,and can be realized through modifying the Fast Field Program model.Using this method,simulation of received signal in shallow water excited by airborne source was carried out.The simulated signal showed that the amplitude fluctuates quickly,the Doppler shift is evident,and more than one peak appear in spectrum.更多还原