Underwater Broadband Signal Waveform Fast Prediction Method in Shallow Water with a Thermocline

For the case of transmission characteristic in shallow water channel, broadband acoustic model have to be considered. A rapid numerical prediction theory of underwater broadband signal waveform is studied in this paper. During building broadband acoustic model in shallow water with a thermocline, based on beam-displacement ray-mode theory (BDRM), approximate expansion of broadband acoustic model with respect to frequency and model parallelization will be used for rapid and accurate broadband signal waveform prediction. According to compare result, it offers a satisfactory degree of accuracy and the calculating speed has been improved comparing with conventional mode method.