Static reanalysis for topological modifications of structures

摘要

A procedure for reanalysis of various structures subjected to various topologic modifi- cations is presented. The procedure is based on the results of a single exact analysis and the factoriza- tion of the stiffness matrix of initial structures. It is suitable for the addition of joints, where the number of the degrees of freedom is increased. The method deals with the stiffness matrix of struc- tures directly, so it can be used with a general finite element system. It is shown that the proposed ap- proximation method is most effective in terms of accuracy, efficiency, and ease of implementation.