[1]丁海平,陈姚杰,于彦彦,等.复杂地形对平面波散射问题频域解的数值求解方法[J].自然灾害学报,2020,29(03):020-27.[doi:10.13577/j.jnd.2020.0303]
 DING Haiping,CHEN Yaojie,YU Yanyan,et al.Numerical solution in frequency domain for scattering of plane wave by complex topography[J].,2020,29(03):020-27.[doi:10.13577/j.jnd.2020.0303]
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复杂地形对平面波散射问题频域解的数值求解方法
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
29
期数:
2020年03期
页码:
020-27
栏目:
出版日期:
2020-06-28

文章信息/Info

Title:
Numerical solution in frequency domain for scattering of plane wave by complex topography
作者:
丁海平12 陈姚杰1 于彦彦1 蔡曼琳1
1. 苏州科技大学 江苏省结构工程重点实验室, 江苏 苏州 215011;
2. 中国地震局工程力学研究所, 黑龙江 哈尔滨 150080
Author(s):
DING Haiping12 CHEN Yaojie1 YU Yanyan1 CAI Manlin1
1. Suzhou University of Science and Technology, Key Laboratory of Structural Engineering of Jiangsu Province, Suzhou 215011, China;
2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
关键词:
复杂地形无量纲频率谱放大系数数值模拟傅里叶变换
Keywords:
complex topographydimensionless frequencyspectral amplification factornumerical simulationFourier transformation
分类号:
P315.3+1X43
DOI:
10.13577/j.jnd.2020.0303
摘要:
详细介绍了求解无量纲频率的谱放大系数的有限元方法,并根据均匀半空间半圆凹陷地形的计算结果与解析解的对比,验证了本文方法的可行性。同时还指出,采用有限元数值模拟方法得到与无量纲频率对应的谱放大系数过程中,地震波的输入类型对结果没有影响,计算模型尺寸和介质参数的选取也很灵活,可以很方便研究复杂地形在地震波作用下不同频率的地表放大效应。
Abstract:
In this paper, the finite element method is introduced to solve the spectral amplification factor for dimensionless frequency in detail. According to the comparison between the calculated results and the analytical solutions, the feasibility of this method is verified. The feasibility of the method in this paper is verified by the comparison between the calculated results of the homogeneous half-space semi-circular Canyon Topograph and the analytical solution. At the same time, it is pointed out that in the process of obtaining the spectral amplification factor corresponding to the dimensionless frequency by using the finite element numerical simulation method, the input type of the seismic wave has no effect on the result, and the selection of the calculation model size and medium parameters is also flexible, which can be convenient to study on the surface amplification effect of different frequencies of complex topography under the seismic waves.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-01-13;改回日期:2020-03-11。
基金项目:国家自然科学青年基金(51808371)
作者简介:丁海平(1966-),男,教授,主要从事地震工程和防灾减灾工程.E-mail:hpding@126.com
更新日期/Last Update: 1900-01-01