ON AN EXTENSION OF CLASSICAL MODAL REANALYSIS ALGORITHMS - THE IMPROVEMENT OF INITIAL MODELS

An extension of the field of applications of classical modal reanalysi s procedures is described, for the case when the number of degrees of freedom of a modified structure is greater than that of the initial st ructure. This feature is not developed classically, and such a case is usually resolved by the use of modal synthesis methods. A pure modal reanalysis procedure, with all the theoretical developments, is presen ted here. It is shown that any classical reanalysis algorithm can be u sed as the basis of the method. A characteristic example is presented, and modal results are discussed and compared with those of a classica l reanalysis procedure. (C) 1995 Academic Press Limited