Analysis of Characteristics of Underwater Sound Propagation in the Ocean by a Finite Difference Time Domain Method
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概要
- 論文の詳細を見る
Many methods of calculation that are useful in deep water like the Pacific Ocean have recently been reported for obtaining sound propagation characteristics. The development of new method is expected for shallow water. In this paper, the finite difference time domain(FDTD)method, which takes account of attenuation, is proposed to calculate the propagation of sound in shallow water with a lossy seabed. The benchmark problem proposed by the Acoustical Society of America was solved by the FDTD method and its results were compared with other methods. The contour pattern of the transmission loss in water and in sediment agreed well with the results of an accurate coupled-mode calculation. A series of propagated pulse wave forms in the same model is also calculated. It is useful for us to recognize the sound propagation not only in water but also in sediment. The FDTD method shows the pulse wave forms with interference between direct wave and reflected waves. These results show the validity of the FDTD method.
- 社団法人応用物理学会の論文
- 2000-05-30
著者
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Endoh Nobuyuki
Department Of Electrical Electronics And Information Engineering Kanagawa University
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Endoh Nobuyuki
Department Of Electrical Electronics And Information Engineering Faculty Of Engineering Kanagawa Uni
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Tsuchiya Takenobu
Department Of Electrical Electronics And Information Engineering Kanagawa University
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Tsuchiya Takenobu
Department Of Electrical Electronics And Information Engineering Faculty Of Engineering Kanagawa Uni
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Tsuchiya Takenobu
Department Of Electrical Engineering Faculty Of Engineering Kanagawa University
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IIJIMA Fumiaki
Department of Electrical Engineering, Faculty of Engineering, Kanagawa University
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Iijima Fumiaki
Department Of Electrical Engineering Faculty Of Engineering Kanagawa University
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Tsuchiya Takenobu
Department of Electrical and Electronic Information Engineering, Kanagawa University, Yokohama 221-8624, Japan
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Endoh Nobuyuki
Department of Electrical and Electronic Information Engineering, Kanagawa University, Yokohama 221-8624, Japan
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