| 海沟内海底地震激发的表面波动 |
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| 引用本文： | 赵曦,王本龙,刘桦.海沟内海底地震激发的表面波动[J].上海力学,2007,28(2):195-202. |
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| 作者姓名： | 赵曦 王本龙 刘桦 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院 上海200030 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 通过底面运动学边界条件引入底面运动影响,采用高阶Boussinesq方程计算了光滑海底变形引起的表面波动形态.对于线性问题,与线性势流波浪理论进行了比较,二者结果符合良好.运用高阶Boussinesq波浪模型,针对冲绳海沟的实际地形,模拟海沟内不同震级的海底地震激发的海啸,分析了不同强度地震引起的表面波扰动形态及其非线性和色散效应.
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| 关 键 词： | 海啸 传递函数 Boussinesq方程 海沟 海底地震 |
| 文章编号： | 0254-0053（2007）02-195-8 |
| 修稿时间： | 2007-01-25 |
Water Waves Generated by Submarine Earthquake in a Trench |
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| ZHAO Xi,WANG Ben-long,LIU Hua.Water Waves Generated by Submarine Earthquake in a Trench[J].Chinese Quarterly Mechanics,2007,28(2):195-202. |
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| Authors: | ZHAO Xi WANG Ben-long LIU Hua |
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| Institution: | School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200030, China |
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| Abstract: | Water waves generated by submarine smoothly raised slides are studied by the Boussinesq equations based numerical simulation.Effects of the motions of seabed have been introduced into the kinematic boundary condition of the bottom.In order to validate the numerical model,the linearized Boussinesq equations are used to simulate the response of the free surface due to the submarine earthquake and the results are compared to the analytic solution of the linear potential theory.It is confirmed that the results of these two methods fit well.Based on the Boussinesq wave model and the geographical data of the Okinawa Trench,the tsunami motivated by different magnitudes of submarine earthquakes are computed.The nonlinear and dispersive characteristics of waves due to different intensity of earthquakes are discussed. |
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| Keywords: | tsunami transfer function Boussinesq equations trench undersea earthquake |
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