A method to handle mesh switches for non-linear structural analysis in explicit dynamics

2011 ◽  
Vol 47 (7) ◽  
pp. 812-824 ◽  
Author(s):  
B. Bourel ◽  
A. Combescure
Keyword(s):  
Structural Analysis ◽  
Explicit Dynamics ◽  
Non Linear

Parallel-vector computation for linear structural analysis and non-linear unconstrained optimization problems

1991 ◽  
Vol 2 (2-3) ◽  
pp. 175-182 ◽  
Author(s):  
D.T. Nguyen ◽  
O.O. Storaasli ◽  
E.A. Carmona ◽  
M. Al-Nasra ◽  
Y. Zhang ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Unconstrained Optimization ◽  
Optimization Problems ◽  
Unconstrained Optimization Problems ◽  
Non Linear

AC0 three-node shell element for non-linear structural analysis

1994 ◽  
Vol 37 (14) ◽  
pp. 2339-2364 ◽  
Author(s):  
P. Boisse ◽  
J. L. Daniel ◽  
J. C. Gelin
Keyword(s):  
Structural Analysis ◽  
Shell Element ◽  
Non Linear

Application of the substructuring technique to non-linear dynamic structural analysis

1990 ◽  
Vol 35 (5) ◽  
pp. 593-601 ◽  
Author(s):  
C.-H. Sheu ◽  
G. De Roeck ◽  
M. Van Laethem ◽  
P. Geyskens
Keyword(s):  
Structural Analysis ◽  
Linear Dynamic ◽  
Non Linear ◽  
Dynamic Structural Analysis

Nonlinear Analysis of Offshore Platforms Subjected to Earthquake Loading Considering the Effects of Joint Flexibility

2009 ◽  
Author(s):  
S. Samadani ◽  
A. A. Aghakouchak ◽  
J. Mirzadeh Niasar
Keyword(s):  
Structural Analysis ◽  
Nonlinear Analysis ◽  
Offshore Structures ◽  
Offshore Platforms ◽  
Joint Flexibility ◽  
Modeling And Analysis ◽  
Shell Elements ◽  
Tubular Joints ◽  
Two Samples ◽  
Non Linear

In a conventional method of structural analysis, for modeling and analysis of jacket type offshore platforms, member connections are assumed to be rigid. In this method, members are rigidly connected which means there is no axial or rotational deformation at the end of brace member relative to chord axis. However in reality local deformations occur at chord surface due to applied loads from braces, which mean tubular joints are considerably flexible especially in non linear range of deformations. Therefore results of analysis based on rigid connections assumption differ from real behavior of the structure. Various research works have been carried out in the past on tubular joints and different methods have been presented in order to include the effect of joint flexibility in structural analysis. Most of these methods are just valid in elastic range but some non-linear methods have also been developed for simple tubular joints. In order to carry out a nonlinear analysis on a 3-D model of an offshore platform with multi-brace / multi-planar tubular joints, none of these simplified methods is applicable. In this case a complete model of tubular joints by non-linear shell elements is the most accurate one which is not only valid for non-linear analyses but also covers all type of tubular joints. In this paper two samples of offshore platforms are studied. These platforms are modeled using the following approaches: 1. No modeling of joints as structural elements (rigid connections). 2. Modeling of joint can with nonlinear shell elements (flexible connection). Different types of static non-linear analysis (Push over) are carried out and results are compared. In order to evaluate the results and compare this type of modeling with simplified methods included in professional software for the analysis of offshore structures, aforementioned platforms are also analyzed using the Fessler and MSL models to include effects of joint flexibility. The results of these types of modeling are also compared with the previous ones.

scholarly journals WHETHER WE ARE READY TO PROCEED TO A NONLINEAR ANALYSIS AT DESIGNING?

2017 ◽  
Vol 13 (3) ◽  
pp. 86-102
Author(s):  
Anatoly V. Perelmuter ◽  
Victor V. Tur
Keyword(s):  
Structural Analysis ◽  
Linear Analysis ◽  
Design Codes ◽  
Limit States ◽  
Advanced Method ◽  
Additional Tool ◽  
Special Cases ◽  
Practical Design ◽  
Non Linear ◽  
Actual Design

Despite of the fact that in recent years the non-linear analysis is considered as an advanced method of structural analysis, the basic requirements, which are associated with this method in actual Design Codes, are often vague and declarative without clear comments. The main problems, which must be solved for implementation of the non-linear analysis in practical design, are discussed. It was shown, that currently non-linear analysiscan be considered as an additional tool, which is utilizing for limit states checking in special cases, for example, checking of the structural robustness in accidental design situation.

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