Estimation of unmeasured DOF's using the local correspondence principle

Abstract

This paper will present a new method to estimate unmeasured Degrees of Freedom (DOF's) in a structure using only a limited amount of sensors. The method applies the Locale Correspondence Principle (LCP) to estimate a linear transformation between experimentally determined mode shapes, and mode shapes from a Finite Element (FE) Model. Mode shapes from the FE model are then altered to fit the real mode shapes of the structure, creating a set of estimated mode shapes covering all nodes. The method is easy to perform and has a wide variety of application within civil- and mechanical engineering. © The Society for Experimental Mechanics, Inc. 2012.