scholarly journals The Study of Soft Soil Seismic Subsidence Based On 3D Model

2021 ◽  
Author(s):  
Ping li ◽  
Junru Gu ◽  
Yingci Liu ◽  
Yuying Li
Keyword(s):  
Ground Motion ◽  
Soft Soil ◽  
Low Frequency ◽  
High Sensitivity ◽  
Simulation Method ◽  
High Amplitude ◽  
Element Analysis ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Soil Site

Abstract Soft soils are characterized by high sensitivity, low strength, and susceptibility to seismic subsidence. In this study, nonlinear dynamic finite element analysis was performed by OpenSees numerical simulation method to evaluate seismic subsidence response of soft soil site to input ground motions. Higher peak acceleration of ground motion enhanced degree of uneven seismic subsidence, depth of seismic depression, and damage to horizontal surface. Frequency characteristics of a ground motion are another factor influencing seismic subsidence of soft soil. Similar predominant frequency of a ground motion to natural frequency of soil site, high number of low frequency contents, and high amplitude of a ground motion promoted a more severe seismic subsidence of soft soil. The findings of this study expand current understanding on seismic subsidence of soft soil.

Ground Motion Synthesis Based on Power Spectrum Envelope

2011 ◽  
Vol 243-249 ◽  
pp. 3854-3857
Author(s):  
Jun Teng ◽  
Tao Zhang
Keyword(s):  
Power Spectrum ◽  
Ground Motion ◽  
Seismic Design ◽  
Response Spectrum ◽  
Element Analysis ◽  
Crucial Step ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Earthquake Action ◽  
Rare Earthquake

The paper proposes a new method, which is used for providing ground motion input for seismic design under rare earthquake action. The crucial step of this method is to use power spectrum envelop, obtained from natural earthquake records but not deriving from response spectrum, as target curve to synthesis ground motion. The result shows that power spectrum obtained from this method fits well with the target curve, and the produced ground motion can properly predict the response spectrum of acceleration. By importing the concept of energy envelope, this method reduces the randomness of the ground motion sampling and the variability of the result in dynamic finite element analysis.

The Dynamic Finite Element Analysis of Shearer’s Running Gear Based on LS-DYNA

2011 ◽  
Vol 402 ◽  
pp. 753-757 ◽  
Author(s):  
Hai Long Tong ◽  
Zhong Hai Liu ◽  
Li Yin ◽  
Quan Jin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Dynamic Contact ◽  
Secondary Development ◽  
Element Analysis ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Element Theory ◽  
Meshing Process

Base on contact kinetics finite element theory, proceed secondary development of road wheel and pin mesh’s nonlinear dynamic contact analysis in LS-DYNA module, and carry out contrast of simulation analysis, achieved stress, strain and dynamic identities that caused by meshing impact in the whole meshing process, accord with practice, can instruct product practice design.

Dynamic Finite Element Analysis of a Cylindrical Roller Bearing

2011 ◽  
Vol 143-144 ◽  
pp. 437-442
Author(s):  
Bao Hong Tong ◽  
Yin Liu ◽  
Xiao Qian Sun ◽  
Xin Ming Cheng
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Roller Bearing ◽  
Element Analysis ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Simulation Results ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

A dynamic finite element analysis model for cylindrical roller bearing is developed, and the complex stress distribution and dynamic contacting nature of the bearing are investigated carefully based on ANSYS/LS-DYNA. Numerical simulation results show that the stress would be bigger when the element contacting with the inner or outer ring than at other times, and the biggest stress would appear near the area that roller contacting with the inner ring. Phenomenon of stress concentration on the roller is found to be very obvious during the operating process of the bearing system. The stress distributions of different elements are uneven on the same side surface of roller in its axis direction. Numerical simulation results can give useful references for the design and analysis of rolling bearing.

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