采用FDTD方法模拟三种简单沉积结构模型的脉动H/V响应

EARTHQUAKE ›› 2010, Vol. 30 ›› Issue (4): 74-81.

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Simulation of Microtremor H/V Responses to Three Simple Sediment Structure Models Using Finite Difference Time Domain Method

PENG Fei¹, HUANG Ling², CHEN Qi-fu¹, LIU Lan-bo^1,3

1. Institute of Earthquake Science, CEA, Beijing 100036, China;
2. College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China;
3. Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA

Received:2010-03-17 Revised:2010-06-30 Online:2010-10-31 Published:2021-10-19

Abstract

Abstract: Microtremor for geophysical passive detection has been rapid developed. Based on the horizontal to vertical spectral ratio (H/V) from the microtremor observation, resonant frequency and sediment thickness can be obtained. In this paper, we set up three kinds of fundamental structures from simple to complex (i.e., a flat layer sediment, a dip layer sediment, a normal and a thrust fault) to simulate the ambient noise superposition and interference using the 2-D finite difference time domain (FDTD) method. The results match well the inversion obtained from the H/V spectral contrast method (Nakamura method), which means the FDTD method can also be a good simulation method to obtain the wave field information generated by random sources, and can provide valuable scientific insight for microtremor applications in earthquake engineering studies.

Key words: Microtremor, 2-D simulation, Finite difference time domain, H/V spectral ratio

CLC Number:

P315.7

PENG Fei, HUANG Ling, CHEN Qi-fu, LIU Lan-bo. Simulation of Microtremor H/V Responses to Three Simple Sediment Structure Models Using Finite Difference Time Domain Method[J]. EARTHQUAKE, 2010, 30(4): 74-81.

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Simulation of Microtremor H/V Responses to Three Simple Sediment Structure Models Using Finite Difference Time Domain Method

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