Simulation and Application of Acoustic Transmission in Shallow Sea Based on Ray Method
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摘要: 为了建立高效实用的水中兵器声场仿真系统,针对3 km以内的浅海近程声传播仿真,利用一种射线逐步追踪算法,结合声异常因子概念,综合考虑由收发位置和水文条件等引起的声线弯曲及传播路径等因素对声场强度的影响,建立了仿真模型。根据该模型,提出了声线密度与声场强度的关系公式,总结了确定声线步长与声线密度的原则,改进了声异常因子和传播损失的计算公式。结合水声设备海上试验数据进行了验证,计算结果表明,在浅海近程声传播仿真中,声线弯曲及传播路径等因素对声场强度的影响是不可忽视的,本文方法能够有效地对其进行表征,其计算结果更加符合实际传播情况,能够满足浅海近程声传播仿真的需要。Abstract: Aiming at the acoustic transmission with 3 km in the shallow sea, an integrative simulation model is built based on the conceptions of the stepping sound ray tracing method and sound abnormity factor. The effects of the propagation path and the sound ray bend due to transmitter and receiver positions and hydrological condition on the sound-field strength are considered in the model. With this model, a principle of identifying sound ray step and density is proposed,the equations of sound abnormity factor and sound transmission loss are modified, and the relation between sound ray density and sound-field strength is presented. Two sets of sea trial data collected by corresponding acoustic equipments show that the effects of sound ray bend and propagation path on sound-field strength can not be ignored in the shallow sea acoustic simulation. This model is effective in simulating practical acoustic characteristics, and the results can satisfy the simulation requirements.
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Key words:
- underwater weapon /
- acoustics /
- ray /
- sound abnormity factor /
- transmission loss
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