scholarly journals Propagation characteristics of seismic waves in shallow soil with the unsaturated three-phase poroelastic model

2014 ◽  
Vol 63 (22) ◽  
pp. 224301
Author(s):  
Ding Wei ◽  
Wu Wen-Wen ◽  
Wang Chi ◽  
Wu Zhi-Qiang
Keyword(s):  
Seismic Waves ◽  
Propagation Characteristics ◽  
Shallow Soil ◽  
Three Phase ◽  
Poroelastic Model

Simulation of propagation characteristics in three-phase-type GIS

2012 ◽  
Author(s):  
Haifeng Ye ◽  
Yong Qian ◽  
Gehao Sheng ◽  
Yue Hu ◽  
Xiuchen Jiang ◽  
...  
Keyword(s):  
Propagation Characteristics ◽  
Three Phase ◽  
Phase Type

Propagation Characteristics of Seismic Waves Taking Stratigraphic Composition into Consideration

2014 ◽  
Vol 989-994 ◽  
pp. 484-489
Author(s):  
Bin Bin Xu ◽  
Kentaro Nakai ◽  
Toshihiro Noda
Keyword(s):  
Seismic Waves ◽  
Ground Surface ◽  
Propagation Characteristics ◽  
Dense Sand ◽  
Sandy Ground ◽  
Acceleration Amplitude ◽  
Dynamic Analyses ◽  
Input Acceleration ◽  
Propagation Properties ◽  
Cam Clay

In this paper, soil-water coupled dynamic analyses are carried out to investigate the influence of stratigraphic composition on the propagation properties of the seismic waves. SYS Cam-clay model is used as the constitutive model which can describe the different state of clayey and sandy soils. Two cases are considered for the composition of ground: one is the sandy ground with diluvial sand, alluvial sand and reclaimed sand; the other one is the clayey layer at the ground surface. It is found that for the sandy ground even though there is certain amplification of the input acceleration wave during the dense sand layer the subsequent seismic waves through the loose sand layers are attenuated significantly due to the occurrence of the liquefaction. While for the clayey ground, even though there is no risk of liquefaction damages at the ground surface the acceleration amplitude is greatly amplified and there is a risk that the structure itself would fail in the strength.

The research of time-frequency characteristics of buried mine of seismic waves in shallow sea

2020 ◽  
Vol 51 (3) ◽  
pp. 35-43
Author(s):  
Shuang Zhao ◽  
Jian Zhang ◽  
Dongwei Kou ◽  
Cean Guo
Keyword(s):  
Wave Field ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Propagation Characteristics ◽  
Shallow Sea ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Rock Density ◽  
Time Frequency ◽  
Simulation Results

To study the variation of the wave field of seismic waves in shallow sea of buried mines, the wave field of buried mine was simulated by employing LS-DYNA software. The effects of different distances ( R), rock density ( ρ2), buried depth ( h), and seawater height ( H) on the variation of wave field were obtained. The time-frequency analysis of the simulation results was carried out by using wavelet transform, and it was determined that the frequency domain of shallow sea is mainly concentrated below 25 Hz. To get the propagation characteristics of shallow sea seismic wave, the wave field below 25 Hz on the surface of buried mine was filtered by the low-pass filter. The buried depth has the greatest influence on the wave field of buried mine. The underwater target can be identified by the propagation characteristics of shallow sea seismic wave. The simulation results are consistent with the experimental results. The research results can provide an important reference for development of buried mine fuse.

Test of the stability of a three-phase contact line with negative line tension

1999 ◽  
Vol 96 (9) ◽  
pp. 1335-1339 ◽  
Author(s):  
ALAN E. VAN GIESSEN, DIRK JAN BUKMAN, B.
Keyword(s):  
Contact Line ◽  
Line Tension ◽  
Phase Contact ◽  
Three Phase ◽  
The Stability
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