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In this thesis, structural damage detection analysis is studied
with consideration of incomplete modal data available. In the
process of damage detection, a two-step method in combination
with a model reduction method is employed. In the first step,
structural parts that are possibly damaged will be located using
force balance method. In the second step, the extent of damage
of structural elements will be evaluated using global
optimization techniques. Regarding model reduction techniques,
an independent mode reduction method is proposed, which gives
better results for damage detection than conventional reduction
methods do. Evaluation of the proposed model reduction method
along with some conventional methods are made by considering
damage detection of a simple chain model. Finally, applicability
of the proposed method is demonstrated by damage detection of a
large truss structure.
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