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[1]王启渊,柴华友*,丁 玮.浅部地下洞穴的瑞利波散射数值分析[J].武汉工程大学学报,2018,40(01):71-78.[doi:10. 3969/j. issn. 1674?2869. 2018. 01. 013]
 WANG Qiyuan,CHAI Huayou*,DING Wei.Numerical Analysis of Rayleigh Wave Scattering over Shallow Cavities[J].Journal of Wuhan Institute of Technology,2018,40(01):71-78.[doi:10. 3969/j. issn. 1674?2869. 2018. 01. 013]
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浅部地下洞穴的瑞利波散射数值分析(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
40
期数:
2018年01期
页码:
71-78
栏目:
资源与土木工程
出版日期:
2018-02-25

文章信息/Info

Title:
Numerical Analysis of Rayleigh Wave Scattering over Shallow Cavities
文章编号:
20180113
作者:
王启渊柴华友*丁 玮
武汉工程大学资源与土木工程学院,湖北 武汉 430074
Author(s):
WANG QiyuanCHAI Huayou*DING Wei
School of Resource and Civil Engineering,Wuhan Institute of Technology,Wuhan 430074, China
关键词:
瑞利波 有限元 洞穴 散射波 表面波场谱 扰动
Keywords:
Rayleigh wavefinite element methodcavityscattered wavessurface wave field spectrumdisturbance
分类号:
U414
DOI:
10. 3969/j. issn. 1674?2869. 2018. 01. 013
文献标志码:
A
摘要:
均匀半无限体中表面源激发的浅部波场由瑞利波主导且能量主要分布于一个波长深度,当瑞利波遇浅部洞穴时,瑞利波不能保持原有传播特性,波会在洞穴边界发生散射。为了分析这一现象,本文采用轴对称模型,数值模拟均匀半空间中洞穴散射波场响应。由偏移距-波长域表面波能量(振幅)谱变化,研究洞穴埋深及几何参数对散射波影响。对表面波场谱扰动特征分析,建立洞穴上方能量分界面对应特征波长与埋深的关系。结果表明:洞穴埋深是影响表面波场谱扰动一个重要参数,埋深约是特征波长1.5倍,波在洞穴边界面绕射会导致洞穴周围表面波场形成能量分界面,由表面波谱这些扰动特征可预测洞穴方位及埋深。
Abstract:
The shallow wave fields induced by the surface sources in homogenous half spaces are dominated by Rayleigh waves,whose energy is distributed within the depth of one wavelength. When the forward Rayleigh waves encounter the shallow cavities,the behavior of Rayleigh waves changes and the waves are scattered at the boundaries of the cavities. To analyze this phenomenon,the axisymmetrical models were used to numerically simulate the responses of the waves scattered at the cavities present in the half space. Effects of the depth and geometrical size of the cavity on the wave scattering were investigated from the disturbances of the surface wave spectrum in the domain of the offset and the wavelength. With the analysis of disturbances characteristics of the surface wave field spectrum, the relationship between the cavity depth and the characteristic wavelength corresponding to the energy interface above the cavities was established. The results showed that the depth of cavity

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金面上项目(41474113);武汉工程大学研究生创新基金(CX2016043)作者简介:王启渊,硕士研究生。E-mail:[email protected]*通讯作者:柴华友,博士,副研究员。E-mail: [email protected]引文格式:王启渊,柴华友,丁玮. 浅部地下洞穴的瑞利波散射数值分析 [J]. 武汉工程大学学报,2018,40(1):71-78.
更新日期/Last Update: 2018-02-01