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Paper Information

Journal:   JOURNAL OF MODELING IN ENGINEERING   SPRING 2011 , Volume 9 , Number 24; Page(s) 0 To 0.
 
Paper: 

A TECHNIQUE FOR IMPROVING DYNAMIC RELAXATION METHOD

 
 
Author(s):  PAJAND M.R.*, REZAEI H.
 
* CIVIL ENGINEERING DEPARTMENT, FERDOWSI UNIVERSITY OF MASHHAD, MASHHAD, IRAN
 
Abstract: 

Dynamic relaxation method is an iterative procedure for solving the simultaneous system of equations. This technique is used in the static and dynamic nonlinear structural analysis. One of the most important parameters in this approach is fictitious damping factor. If this factor is selected more accurately, convergence rate will rise. In this paper, inverse vector iteration method is utilized to find the damping factor in the dynamic relaxation iterations, and a new formulation is proposed. The geometric nonlinear analysis of several plane and space trusses and also structural frames are performed using the suggested method. The numerical results indicate that the convergence rate improves compared with the conventional dynamic relaxation procedure so that the number of iterations and the analysis time decrease significantly. Consequently, the authors' technique makes the solving process faster and more capable.

 
Keyword(s): DYNAMIC RELAXATION, INVERSE VECTOR ITERATION, NONLINEAR BEHAVIOR STATIC PATH, LARGE DEFORMATIONS
 
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