Penalty finite element method for nonlinear dynamic response of viscous fluid-saturated biphase porous media

2000 ◽  
Vol 21 (12) ◽  
pp. 1381-1389
Author(s):  
Yan Bo ◽  
Zhang Ru-qing
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Porous Media ◽  
Viscous Fluid ◽  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Response ◽  
Penalty Finite Element Method ◽  
Element Method

Nonlinear Dynamic Behavior of Fixed Jacket-Type Offshore Platforms Subjected to Simultaneously Acting Wave and Earthquake Loads

2004 ◽  
Author(s):  
A. K. Etemad ◽  
A. R. M. Gharabaghi ◽  
M. R. Chenaghlou
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Dynamic Behavior ◽  
Persian Gulf ◽  
Nonlinear Dynamic ◽  
Longitudinal Component ◽  
Offshore Platforms ◽  
Nonlinear Dynamic Response ◽  
Earthquake Loads

The nonlinear dynamic response of jacket-type offshore platform (which has been installed in Persian Gulf) under simultaneously wave and earthquake loads is conducted. The interaction between soil and piles is modeled by Konagai-Nogami model. The structure is modeled by finite element method. The analyses include models with the longitudinal component of earthquake and wave in the same direction and in different directions. The results indicate that when the longitudinal component of earthquake and wave are in the same direction, wave may reduce the response of studied platform and when they are in different directions, in some cases there is an increase in the response of platform.

scholarly journals Dynamic Analysis of Bolted Cantilever Beam with Finite Element Method Considering Thread Relation

2020 ◽  
Vol 10 (20) ◽  
pp. 7036
Author(s):  
Chao Cao ◽  
Xueyan Zhao ◽  
Zhenghe Song
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Dynamic Analysis ◽  
Cantilever Beam ◽  
Nonlinear Dynamic ◽  
Beam Model ◽  
Nonlinear Phenomenon ◽  
Bolted Joint ◽  
Element Method

There are complex nonlinear behaviors and mechanisms in the bolted joint interface. Thus, the bolted joint is crucial to the complex nonlinear dynamic response of the structure. However, in the traditional structural dynamic analysis, the screw connection is usually neglected, which makes it challenging to analyze and study the nonlinear dynamic behavior of bolted structures. Hence, based on the Timoshenko beam theory and finite element method, this paper introduces a model considering thread connection to analyze the dynamic response under different excitation. Eventually, the results indicate that owing to the local nonlinearity of bolts, the whole bolted cantilever beam shows hardening-type characteristics. In addition, the frequency response curve also depicts the typical nonlinear phenomenon of instability and uncertainty, namely bifurcation, which preliminarily verifies the correctness and accuracy of the bolted cantilever beam model.

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