scholarly journals Three-dimensional finite difference method and hybrid modeling of earthquake ground motion

2002 ◽  
Vol 107 (B8) ◽  
Author(s):  
Ivo Oprsal
Keyword(s):  
Finite Difference ◽  
Finite Difference Method ◽  
Ground Motion ◽  
Difference Method ◽  
Three Dimensional ◽  
Hybrid Modeling ◽  
Earthquake Ground Motion

Simulation of the Seismic Response of Two Different Thick Deposition Layers with Hybrid PSM/FDM Method

2013 ◽  
Vol 353-356 ◽  
pp. 1858-1866
Author(s):  
Wu Jian Yan ◽  
Yu Cheng Shi
Keyword(s):  
Finite Difference ◽  
Finite Difference Method ◽  
Ground Motion ◽  
Difference Method ◽  
Strong Ground Motion ◽  
Pseudospectral Method ◽  
Wavefield Simulation ◽  
The Finite Difference Method ◽  
Seismic Wavefield ◽  
Strong Ground

In this paper, we simulated two-dimension numerical on the strong ground motion through the hybrid scheme based on the pseudo-spectral method (PSM) and finite difference method (FDM). We based on the same focal depth, and 2 different thick deposition layers are used as models to analyze the relationship between site situation and the peak displacement of strong ground motion. The results show that the hybrid PSM/FDM method for seismic wavefield simulation combines with advantages of the pseudospectral method and the finite difference method and makes up for the disadvantage of the pseudospectral method and the finite difference method, so this method can process well the calculation of the discontinuous medium surface, then the calculation accuracy is similar to the pseudospectral method. Through the wavefield simulation it is known that the range of the seismic wavefield the peak ground displacement (PGD) of the thicker deposition is larger and the influence of the secondary surface wave at the basin edge is more obvious. The thicker deposition amplitude of strong ground motion in the basin is larger and the duration is longer, and the reflected wave of which is more obvious and stronger. However, the difference of the site condition has little influence to strong ground motion in the horizontal direction.

Non-Paraxial Split-Step Semi-Vectorial Finite-Difference Method for Three-Dimensional Wide-Angle Beam Propagation

2010 ◽  
Vol 27 (1) ◽  
pp. 014201
Author(s):  
Cheng Hua ◽  
Zang Wei-Ping ◽  
Zhao Zi-Yu ◽  
Li Zu-Bin ◽  
Zhou Wen-Yuan ◽  
...  
Keyword(s):  
Finite Difference ◽  
Finite Difference Method ◽  
Difference Method ◽  
Three Dimensional ◽  
Beam Propagation ◽  
Wide Angle

Numerical Investigation on Unstable Oscillations of Two Circular Cylinders in Tandem Arrangement

2003 ◽  
Author(s):  
Yoshiaki Itoh ◽  
Ryutaro Himeno
Keyword(s):  
Finite Difference ◽  
Finite Difference Method ◽  
Numerical Investigation ◽  
Difference Method ◽  
Three Dimensional ◽  
Circular Cylinders ◽  
Damping Force ◽  
Negative Damping ◽  
Good Agreement ◽  
Three Dimensional Simulations

Three-dimensional simulations of incompressible and viscous flow around tandem circular cylinders at Re = 20000 in unstable oscillations can be carried out by means of finite difference method without any turbulence model. The numerical response behaviors are in good agreement with the previous experimental ones. The mechanism of negative damping force in vortex-induced oscillations and wake-galloping is investigated.

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