Three-dimensional nonlinear analysis of drill string structure in annulus

1994 ◽  
Vol 15 (3) ◽  
pp. 275-290 ◽  
Author(s):  
Liu Yan-qiang ◽  
Lü Ying-min
Keyword(s):  
Nonlinear Analysis ◽  
Three Dimensional ◽  
Drill String ◽  
String Structure

Dynamic Nonlinear Analysis of an Hybrid Base Isolation System with Viscous Dampers and Friction Sliders in Parallel

2012 ◽  
Vol 234 ◽  
pp. 96-101 ◽  
Author(s):  
Donato Cancellara ◽  
Fabio de Angelis
Keyword(s):  
Nonlinear Analysis ◽  
Base Isolation ◽  
Three Dimensional ◽  
Time History ◽  
Seismic Action ◽  
Viscous Dampers ◽  
Isolation System ◽  
Fixed Base ◽  
Base Isolation System ◽  
Dynamic Nonlinear Analysis

In the present work we have analyzed a particular base isolation system for the seismic protection of a multi-storey reinforced concrete (RC) building. The viscous dampers and friction sliders are the devices adopted in parallel for realizing the base isolation system. The base isolation structure has been designed and verified according to European seismic code EC8 and by considering for the friction sliders the influence of the sliding velocity on the value of the friction coefficient. A dynamic nonlinear analysis for a three-dimensional base isolated structure has been performed. Recorded accelerograms for bi-directional ground motions have been used which comply with the requirements imposed by EC8 for the representation of a seismic action in a time history analysis. In this paper a comparative analysis is presented between the base isolated structure with the described hybrid base isolation system and the traditional fixed base structure.

scholarly journals A GPU-Based Parallel Procedure for Nonlinear Analysis of Complex Structures Using a Coupled FEM/DEM Approach

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Lixiang Wang ◽  
Shihai Li ◽  
Guoxin Zhang ◽  
Zhaosong Ma ◽  
Lei Zhang
Keyword(s):  
Comparative Study ◽  
Computer Science ◽  
Nonlinear Analysis ◽  
Three Dimensional ◽  
Concrete Structures ◽  
Thermomechanical Analysis ◽  
Complex Structures ◽  
Large Structure ◽  
Performance Improvements ◽  
Parallelization Strategy

This study reports the GPU parallelization of complex three-dimensional software for nonlinear analysis of concrete structures. It focuses on coupled thermomechanical analysis of complex structures. A coupled FEM/DEM approach (CDEM) is given from a fundamental theoretical viewpoint. As the modeling of a large structure by means of FEM/DEM may lead to prohibitive computation times, a parallelization strategy is required. With the substantial development of computer science, a GPU-based parallel procedure is implemented. A comparative study between the GPU and CPU computation results is presented, and the runtimes and speedups are analyzed. The results show that dramatic performance improvements are gained from GPU parallelization.

Three-dimensional nonlinear analysis for seismic soil–pile-structure interaction

2004 ◽  
Vol 24 (4) ◽  
pp. 343-356 ◽  
Author(s):  
B.K. Maheshwari ◽  
K.Z. Truman ◽  
M.H. El Naggar ◽  
P.L. Gould
Keyword(s):  
Nonlinear Analysis ◽  
Three Dimensional ◽  
Structure Interaction

A Three-Dimensional Geometrically Nonlinear Analysis of Pipelaying in an Ocean Environment

1981 ◽  
Vol 103 (2) ◽  
pp. 201-205
Author(s):  
S. Odorizzi ◽  
B. A. Schrefler
Keyword(s):  
Hydrostatic Pressure ◽  
Nonlinear Analysis ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Bending Stiffness ◽  
Ocean Floor ◽  
Geometrically Nonlinear ◽  
External Hydrostatic Pressure ◽  
Geometrically Nonlinear Analysis ◽  
Ocean Environment

A three-dimensional analysis for pipelines suspended between the ocean floor and a laying barge or a stinger is presented. The analysis performed is capable of handling not only variations in bending stiffness, weight and buoyancy, crosscurrents and lateral bay drift, but also the effects of external hydrostatic pressure and buckling of the pipes. For this purpose a total Lagrangian geometrically nonlinear analysis in space. Examples are given which demonstrate the versatility of the analysis proposed.

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