Propagation of seismic waves caused by underwater infrasound

被引：0
|
作者：
Zhang H.-G. [1 ]
Piao S.-C. [1 ]
Yang S.-E. [1 ]
机构：
[1] Acoustic Science and Technology Laboratory, Harbin Engineering University
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2010年 / 31卷 / 07期
关键词：
Elastic parabolic approximation; Infrasound; Seismic wave;
D O I：
10.3969/j.issn.1006-7043.2010.07.011
中图分类号：
学科分类号：
摘要：
At present, theoretical analysis of the bottom seismic wave have been limited to dealing with a horizontal layered elastic bottom. A more detailed understanding would allow more accurate modeling of the interactions of seismic waves with the ocean bottom. The mechanisms promoting seismic wave propagation in shallow water were studied. With an elastic ocean bottom and a shear wave larger than the speed of sound it was found that all four cases, the normal modes in water and the Scholte waves in water, as well as the sub-interface waves and the Scholte waves were excited by low frequency sources in shallow water. An elastic parabolic approximation method for calculating seismic waves was developed. A field distribution rule for seismic waves was also analyzed. In wedge shaped basins with an elastic bottom, the energy of the normal modes in water as well as that of sub-interface waves will experience leakage as water depth decreased.
引用
收藏
页码：879 / 887
页数：8
相关论文
共 18 条
  • [1] Chen Y., Lu J., Yu F., The ship induced seismic wave and its application in the underwater target detection, Ship Science and Technology, 27, 3, pp. 62-66, (2005)
  • [2] Rauch D., Seismic interface waves in coastal waters: A review, (1980)
  • [3] Dorman L.M., Sauter A.W., Short-range seismoacoustic propagation on and off the beach, Journal of the Acoustical Society of America, 98, 5, pp. 2971-2971, (1995)
  • [4] Sutton G.H., ULF/VLF ocean bottom seismo-acoustics, (1990)
  • [5] Brocher T.M., Iwatake B.T., Gettbust J.F., Et al., Comparison of the S/N ratios of low-frequency hydrophones and geophones as a function of ocean depth, Bulletin of the Seismological Society of America, 71, 5, pp. 1649-1659, (1981)
  • [6] Spain D., Hodgkiss W.S., Comparison of swallow float, ocean bottom seismometer, sonobuoy data in the VLF (very low frequency) band, (1988)
  • [7] Tencate J.A., Beamforming on seismic interface waves with an array of geophones on the shallow sea floor, IEEE Journal of Oceanic Engineering, 20, 4, pp. 300-310, (1995)
  • [8] Dolgikh G.I., Experimental investigations of seismoacoustic signals excited by a low-frequency hydroacoustic source, Acoustical Physics, 44, 3, pp. 301-304, (1998)
  • [9] Averbakh V.S., Bogolyubov B.N., Application of hydroacoustic radiators for the generation of seismic waves, Acoustical Physics, 48, 2, pp. 149-155, (2002)
  • [10] Dolgikh G.I., Valentin D.I., Dolgikh S.G., Et al., Application of horizontally and vertically oriented strainmeters in geophysical studies of transitional zones, Izvestiya Physics of the Solid Earth, 38, 8, pp. 686-689, (2002)
12