National Taiwan Ocean University Institutional Repository:Item 987654321/24514
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 28605/40643
造访人次 : 4667634      在线人数 : 396
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 进阶搜寻


题名: Surface motion of multiple alluvial valleys for incident plane SH-waves by using a semi-analytical approach
作者: Jeng-Tzong Chen;Po-Yuan Chen;Chia-Tsung Chen
贡献者: NTOU:Department of Harbor and River Engineering
关键词: Degenerate kernel;Fourier series;Null-field integral equation;Helmholtz problem;Alluvial valley
日期: 2008-01
上传时间: 2011-10-20T08:12:34Z
出版者: Soil Dynamics and Earthquake Engineering
摘要: abstract:In this paper, the degenerate kernels and Fourier series expansions are adopted in the null-field integral equation to solve the exterior Helmholtz problems with alluvial valleys. The main gain of using degenerate kernels in integral equations is free of calculating the principal values for singular integrals by locating the null-field point exactly on the real boundary. An adaptive observer system is addressed to fully employ the property of degenerate kernels for circular boundaries in the polar coordinate. Image concept and technique of decomposition are utilized for half-plane problems. After moving the null-field point to the real boundary and matching the boundary conditions, a linear algebraic system is obtained without boundary discretization. The unknown coefficients in the algebraic system can be easily determined. The present method is treated as a “semi-analytical” solution since error only attributes to the truncation of Fourier series. Earthquake analysis for the site response of alluvial valley or canyon subject to the incident SH-wave is the main concern. Numerical examples including single and successive alluvial valleys are given to test our program. Limiting cases of a single canyon and two successive canyons are also addressed. Amplification of soft basin is also observed in this study. The validity of the semi-analytical method is verified. Our advantages, well-posed model, principal value free, elimination of boundary-layer effect and exponential convergence and mesh-free, by using the present method are achieved.
關聯: 28(1), pp.58–72
显示于类别:[河海工程學系] 期刊論文





著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈