フィルタリングアルゴリズムを用いた大型浮遊式海洋建築物模型の損傷同定解析

抄録

This paper is concerned with the identification analysis of structural damage detection on the unit-linked floating structure model based on fluid-coupled free vibration equation and filtering algorithm. The problem of structural damage detection is formulated as an inverse problem in structural engineering. The formulated inverse problem must be analyzed under the consideration of stochastic properties on the responses of system because the observations of the system are usually measured in the presence of noise. The filtering algorithm has been well known as the solution method that is able to consider stochastic properties. In this paper two kinds of filtering algorithm, namely the extended Kalman filtering algorithm and new filtering algorithm based on the projection filter, are employed in the identification analysis. The coupled natural frequencies used as the observations and stochastic properties of system responses adopted the data obtained by experimental modal analysis.