Abstract

The rotating beam structure has been used widely in many fields of engineering. It is important to conduct damage detection in such structure in order to maintain its safety and durability. In this paper, damage detection study is investigated on a rotating flexible beam driven by the rigid hub. In doing so, the equation of motion for in-plane vibration including axial and chordwise deformation is established at first. Then damage detection as an inverse problem is formulated as a nonlinear least-squares optimization problem which is solved from the time domain sensitivity analysis. Trust region constraint and the Tikhonov regularization are called to enhance the convergence. A Numerical example is studied to illustrate the feasibility and efficiency of the present approach.KeywordsRotating flexible beamTime domain analysisResponse sensitivityTrust regionTikhonov regularization

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