An updated Lagrangian finite element formulation for large displacement dynamic analysis of three-dimensional flexible riser structures

2011 ◽  
Vol 38 (5-6) ◽  
pp. 793-803 ◽  
Author(s):  
S.A. Hosseini Kordkheili ◽  
H. Bahai ◽  
M. Mirtaheri
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Three Dimensional ◽  
Large Displacement ◽  
Finite Element Formulation ◽  
Element Formulation ◽  
Flexible Riser ◽  
Lagrangian Finite Element ◽  
Updated Lagrangian

Nonlinear Dynamic Analysis of Flexible Riser Structures

2008 ◽  
Author(s):  
S. A. Hosseini Kordkheili ◽  
H. Bahai
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Three Dimensional ◽  
Nonlinear Dynamic Analysis ◽  
Linearization Method ◽  
Element Formulation ◽  
Large Rotation ◽  
Pipe Elbow ◽  
Lagrangian Finite Element ◽  
Updated Lagrangian

An updated Lagrangian finite element formulation of a three-dimensional pipe elbow element is presented for large displacement and large rotation dynamic analysis. In this formulation a particular linearization method is used to avoid inaccuracies normally associated with the linearization schemes. The formulation has been implemented in a nonlinear finite element code and the results are verified. It is shown that the proposed formulation generates improved results over those previously reported in the literature.

scholarly journals A new fluid structure coupling

2007 ◽  
pp. 521-536
Author(s):  
Nicolas Aquelet ◽  
Benjamin Tutt
Keyword(s):  
Finite Element ◽  
Flow Model ◽  
Air Flow ◽  
Coupling Method ◽  
Finite Element Formulation ◽  
Element Formulation ◽  
Interaction Forces ◽  
Porous Flow ◽  
Lagrangian Finite Element ◽  
Updated Lagrangian

The modelling of parachutes at Irvin Aerospace Inc. was based on the penalty Euler-Lagrange coupling method to compute the interaction between an Arbitrary Lagrange Euler formulation for the air flow and an updated Lagrangian finite element formulation for the canopy dynamics. This approach did not permit the effect of fabric porosity to be accounted for. In this paper, a new porosity Euler-Lagrange coupling models the fabric permeability by assessing the interaction forces based on the Ergun porous flow model. This paper provides validations for the technique when considering parachute applications and discusses the interest of this development to the parachute designer.

Sign in / Sign up

Export Citation Format

Share Document