Proceeding of KASS Symposium (한국공간구조학회:학술대회논문집)
- 2006.05a
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- Pages.170-174
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- 2006
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- 2287-7401(eISSN)
Improvement of Newton-Raphson Iteration Using ELS
강성등가하중을 이용한 Newton-Raphson Iteration 개선
Abstract
This paper presents a new nonlinear analysis algorithm which uses the equivalent nodal load for the element stiffness. The equivalent nodal load represents the influence of the stiffness change such as the addition of elements, the deletion of elements, and/or the partial change of element stiffness. The nonlinear analysis of structures using the equivalent load improves the efficiency very much because the inverse of the structural stiffness matrix, which needs a large amount of computation to calculate, is reused in each loading step. In this paper, the concept of nonlinear analysis using the equivalent load for the element stiffness is described and some numerical examples are provided to verify it.