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本文主要综述了N波研究的发展、现状及应用。文章首先叙述了N波研究发展的历史和在理论上和实验上所做过的研究状况,还介绍了所使用的声源。并指出了N波的长度和冲击超压与传播距离间的关系,以及它的频谱特点;再就是冲击上升时间与冲击超压的关系和非线性效应超压阈值。最后,介绍了N波研究在军事、探矿、探油、无损检测、声学和医学中的实际应用。
This article mainly reviews the development, current situation and application of N wave research. The article first narrates the history of N wave research and development and the theoretical and experimental research done, and introduces the sound source used. The relationship between the length of N wave and the impact overpressure and the propagation distance is also pointed out. The relationship between the impact rise time and impact overpressure and the nonlinear effect overpressure threshold are also discussed. Finally, the practical applications of N wave research in military, prospecting, oil exploration, nondestructive testing, acoustics and medicine are introduced.