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Rayleigh波在浅圆凹陷地形附近的散射:高频解答

, PP. 24-29

Keywords: 凹陷地形,Rayleigh波,散射,高频,解析解

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Abstract:

利用波函数展开法给出了Rayleigh波在浅圆凹陷地形附近散射的一个高频解析解,并分析了入射频率、凹陷地形宽度和深度等因素对波散射的影响.数值结果表明,由于Rayleigh波幅值随深度而衰减,凹陷地形表面位移幅值整体上较小,且随着凹陷地形深度的增加而减小;由于Rayleigh波幅值还随频率而衰减,随着入射频率的升高,凹陷地形表面位移幅值逐渐减小;由于凹陷地形的屏障作用,在入射波的近端,地表位移分布变得相对复杂,地表位移峰值出现在左角点附近,而在入射波远端,地表位移分布相对简单,地表位移峰值出现在距凹陷地形较远的地方.

References

[1]  Todorovska M I,Lee V W.A note on scattering of Ray leigh waves by shallow circular canyons:analytical approach[J].Bulletin of Indian Society of Earthquake Technology,1991,28(2):1~16.
[2]  梁建文,罗昊,Lee V W.任意圆弧形凸起地形中隧洞对入射平面SH波的影响[J].地震学报,2004,26(5):495~508.
[3]  Pao Y H,M ow C C.Diffraction of elastic waves and dynamic stress concentration[M].New York:Crane,Russak and Company,1973.
[4]  CaoH,Lee V W.Scattering and diffraction of plane P waves by circular cylind rical canyons with variable depth-to-width ratio[J].Soil Dynamics Earthquake Engineering,1989,9:141~150.
[5]  Yuan X,Liao Z P.Scattering of plane SH waves by a cylindrical canyon of circular-arc cross-section[J].Soil Dynamics and Earthquake Engineering,1994,13:407~412.
[6]  胡聿贤.地震工程学[M].北京:地震出版社,1988.
[7]  Abramowitz M,Stegun I A.Handbook of mathematical functions,with formulas,graphs,and mathematical tables[M].New York:Dover Publication,1972.
[8]  Lee V W,CaoH.Diffraction of SV waves by circular cylindrical canyons of various depths[J].Journal of Engineering Mechanics,A SCE,1989,115:2035~205.

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