抄録
The structural damage detection of truss structures is formulated as the framework of inverse problem. In this inverse analysis, the solution procedure is developed in combination with the forward structural analysis and the filtering algorithms. Especially, the filtering algorithms are based on the filter theory of the well-known Wiener filter and the projection filter. Paying attention to some notable characteristics in the truss structure in which the change of stiffness under damage of member is lager than that of the frame structure, the natural frequencies corresponding to each eigen-mode are effectively used as the observed data. In order to verify the characteristics of both filters two types of truss structure are selected in performing numerical example. The first one is a symmetric truss whose both ends are simply supported. And the other is a cantilever-type un-symmetric truss. The notable characteristics of two filtering procedures in applying this inverse problem are made clear through numerical simulations.
