Components and Propagation Characteristics of
 Seabed Seismic Waves

doi:10.16183/j.cnki.jsjtu.2018.12.012

Abstract

Abstract: To obtain components and propagation characteristics of seabed seismic waves, the wave field in the two-layer semi-infinite liquid-solid ocean model is expressed in the form of complex integral. The far-field approximation solution of the wave field complex integral is obtained by using the saddle point method. The wave components corresponding to the integral solution and its characteristics are then presented. Results show that the wave components at the seabed interface are direct acoustic wave, reflected acoustic wave, lateral wave, transmitted longitudinal wave, transmitted transverse wave, leaky Rayleigh wave and Scholte wave. The wavefronts of the direct acoustic wave, reflected acoustic wave and transmitted waves are spherical, and those of the lateral wave and Scholte wave are conical and cylindrical respectively. In addition, the high-order staggered-grid finite difference method is applied to simulate the wave propagation process, and wave field snapshots are shown. The wave components and their propagation characteristics are visually displayed. The numerical simulation results are in good agreement with the theoretical analysis.

Key words: seabed seismic wave, complex integral, the saddle point method, finite difference

CLC Number:

O 427.1

MENG Luwen, LUO Xiayun, CHENG Guangli, ZHANG Mingmin. Components and Propagation Characteristics of Seabed Seismic Waves[J]. Journal of Shanghai Jiaotong University, 2018, 52(12): 1627-1633.

References

［1］ALLOUCHE N E, DRIJKONINGEN G G, VERSTEEG W, et al. Converted waves in a shallow marine environment: Experimental and modeling studies［J］. Geophysics, 2011, 76(1): T1-T11. ［2］CARBAJAL-ROMERO M, FLORES-MENDEZ E, FLORES-GUZMAN N, et al. Scholte waves on fluid-solid interfaces by means of an integral formulation［J］. Geofisica Internacional, 2013, 52(1): 21-30. ［3］GUSEV V A, SIMONOVA P A. Effect of shear components of the acoustic field in the viscous liquid on the structure of structure of the Stoneley wave at the interface between the liquid and elastic half-spaces［J］. Physics of Wave Phenomena, 2015, 23(4): 268-272. ［4］LU Z H, ZHANG Z H, GU J N. Analysis on the frequency dispersion characteristics of seismic wave caused by low frequency sound source in shallow sea［J］. Ocean Engineering, 2015, 106: 354-359. ［5］卢再华, 张志宏, 顾建农. 低频声源海底地震波的时域合成波形分析［J］. 上海交通大学学报, 2014, 48(1): 50-55. LU Zaihua, ZHANG Zhihong, GU Jiannong. Analysis of synthetic seismograms at seafloor caused by low frequency sound source［J］. Journal of Shanghai Jiao Tong University, 2014, 48 (1): 50-55. ［6］孟路稳, 程广利, 陈亚男, 等. 舰船地震波传播机理及其在水雷引信中的应用研究［J］. 兵工学报, 2017, 38(2): 320-325. MENG Luwen, CHENG Guangli, CHEN Yanan, et al. Influence of ocean environment parameters on Scholte wave［J］. Acta Armamentarii, 2017, 38(2): 320-325. ［7］BREKHOVSKIKH L M. 分层介质中的波［M］. 杨训仁.北京: 科学出版社, 1960: 188-192. BREKHOVSKIKH L M. Waves in layered media［M］. Beijing: Science Press, 1960: 188-192. ［8］梁昌洪. 复变函数札记［M］. 北京: 科学出版社, 2011: 280-285. LIANG Changhong. Notes on complex variable functions［M］. Beijing: Science Press, 2011: 280-285. ［9］PHAM C V. Scholte-wave velocity formulae［J］. Wave Motion, 2013, 50(2): 180-190. ［10］祝捍皓, 郑红, 林建民, 等. 海洋环境参数对Scholte波特性的影响［J］. 上海交通大学学报, 2016, 50(2): 257-264. ZHU Hanhao, ZHENG Hong, LIN Jianmin, et al. Influence of ocean environment parameters on Scholte wave［J］. Journal of Shanghai Jiao Tong University, 2016, 50(2): 257-264. ［11］LAKZIZ J, OTMANE S, OUASKIT S. et al. Finite difference time domain method for acoustic waves in attenuate and absorptive medium for layered underwater acoustic environments［J］. Journal of Marine Technology & Environment, 2014(2): 47-54. ［12］GUSEV V, DESMET C, LAURIKS W, et al. Theory of Scholte, leaky Rayleigh, and lateral wave excitation via the laser-induced thermoelastic effect［J］. Journal of the Acoustical Society of America, 1996, 100(3): 1513-1528.

[1]	BAI Xu, YANG Sujie. Simulation of Undercooling Influence on Shape and Velocity of Seawater Freezing Process Using Phase Field Method [J]. Journal of Shanghai Jiao Tong University, 2021, 55(5): 513-520.
[2]	YUAN Xinyi, SU Yan, LIU Zuyuan. Numerical Investigation of Three-Dimensional Shallow-Water Sloshing Based on High Accuracy Boussinesq Equations [J]. Journal of Shanghai Jiao Tong University, 2021, 55(5): 521-526.
[3]	ZAN Peng,ZHANG Chundong,LIU Yankai,GAO Zhiyuan. Research on Bio-Electromagnetic Compatibility of Artificial Anal Sphincter Based on Transcutaneous Energy Transfer [J]. Journal of Shanghai Jiaotong University, 2018, 52(8): 997-1002.
[4]	CHEN Bin1 (陈斌), SU Feng1 (苏锋), HUO Cun-feng2 (霍存锋), ZHANG Ru-bin1 (张汝彬),YAO Bao-heng2* (姚宝恒), LIAN Lian2 (连琏). Numerical Investigation of the Dynamics for Low Tension Marine Cables [J]. Journal of shanghai Jiaotong University (Science), 2015, 20(3): 257-264.
[5]	WANG Zhao-yang (王朝阳), LI Hai-bin* (李海滨), WEI Guang-mei (韦广梅). A Research for Error Compensation Algorithm of Dual Range Pressure Sensor [J]. Journal of shanghai Jiaotong University (Science), 2015, 20(3): 370-373.
[6]	TANG Hua,XIONG Xiaorong,DENG Qin,YUAN Conghua,WU Zhenjun. Deformation Law and Failure Mechanism of Anchorage-Surrounding Rock System of Puli Extra-large Bridge [J]. Journal of Shanghai Jiaotong University, 2015, 49(07): 961-967.
[7]	SHAO Xin-Hui, XUE Guan-Yu, SHEN Hai-Long. A New Finite Difference Method for Rosenau-Burgers Equation [J]. Journal of Shanghai Jiaotong University, 2012, 46(10): 1693-1696.
[8]	ZHANG Peng, WANG Jian-hua, CHEN Jin-jian. Mechanical Behavior of the Interface between Reinforcement and Soil in Pull-out Tests on Geotextiles [J]. Journal of Shanghai Jiao Tong University, 2004, 38(06): 999-1002.

Components and Propagation Characteristics of Seabed Seismic Waves

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 8

Recommended Articles

Metrics

Comments