Author(s)

G. Niederwanger

Abstract

Numerical models of structures identified by dynamic measurements G. Niederwanger Institute of Strength of Materials, University of Innsbruck, Austria Summary Vibrations on buildings caused by rotating machines, traffic, vibrators for surface compaction, bells in bell towers etc. can lead to damage of buildings if the strength of the structure oversteps empirically determined limits. Numerical determination, however, is often not possible because in many cases the dynamic behaviour of the structure, the elastic constants, the acting forces etc. are not exactly known. It is therefore necessary to carry out measurements to get realistic information of the building. 1 Introduction In many fields of technology it is necessary to find parameters of a building by measurements to determine the often complex behaviour of the structure and to control and adjust the numerical model. For dynamic calculations in many cases a linear inhomogenous differential equation system with n degre

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