活断层的高精度数值模拟研究  

Study on high-precision numerical seismic modeling of active faults

作　　者：刘洋 傅少君 杨东方 LIU Yang;FU Shaojun;YANG Dongfang(Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi'an 710123,China;Rocket Force University of Engineering,Xi'an 710025,China)

机构地区：[1]西京学院陕西省混凝土结构安全与耐久性重点实验室,陕西西安710123 [2]中国人民解放军火箭军工程大学,陕西西安710025

出　　处：《武汉大学学报（工学版）》2020年第1期43-48,共6页Engineering Journal of Wuhan University

基　　金：陕西省教育厅基金项目(编号:17JK1167)。

摘　　要：将高精度的双吸收边界条件和任意偶阶高精度差分算子有限差分地震正演算法应用到城市活断层的数值正演中,并设计了2个城市活断层模型进行波场分析,得到活断层的地震记录响应特征,并通过寻求活断层在地震记录上的特征,帮助解释实际活断层地震资料表征的地下介质结构、岩性与年代。结果表明,高精度数值正演方法能辅助地震资料的更精确解释,地震勘探能查明活断层构造,从而指导工程的设计施工。In this paper, high-precision seismic numerical model which combines the double absorbing boundary condition and arbitrary even-order finite-difference operator is applied in numerical simulation of active faults in urban areas. Two typical active fault models are designed to analyze wave fields and to obtain seismic responses.Through analyzing the characteristics of active faults in seismic records, the structure, lithology and decades of the underground media are determined. The results show that high-precision numerical modeling can provide a more effective basis for seismic data interpretation. Seismic exploration can prove up active faults effectively,and can provide guide for the engineering design and construction.

关 键 词：城市活断层探测 地震数值正演 吸收边界条件 

分 类 号：TU457[建筑科学—岩土工程]