AN ITERATIVE METHOD FOR THE ANALYSIS OF LARGE STRUCTURAL SYSTEMS,
Abstract
An iterative method to analyze large structural systems subjected to static and thermal loadings is developed. This method is essentially the displacement method of analysis in which the finite elements are grouped into convenient size substructures. The analysis proceeds with one substructure at a time, and a process of iteration establishes the continuity of the system. The speed of convergence depends on the nature of the stiffness matrices of the substructures. To illustrate the method, two frame structures are analyzed. One is an 1800 degree of freedom system and the other a smaller system. The purpose of the larger one is to estimate the computational time involved. The results of the smaller system (by iterative analysis) are compared with those obtained from direct analysis, and the results are nearly the same. The main advantages of the iteration method are that the entire computational scheme can be carried out without exceeding the core capacity of the computer, and the method is more economical with respect to computational time than the direct analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- AD0670846
Entities
People
- V. B. Venkayya
Organizations
- Flight Dynamics Laboratory