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Research on damage assessment of underwater structure by underwater explosion
Author(s): 
Pages: 90-97
Year: Issue:  1
Journal: Journal of Ship Mechanics

Keyword:  underwater explosiondamage assessmentwavelet packetfactor analysisFisher discriminant;
Abstract: Based on the experiment data of a underwater structure subjected to underwater explosion and wavelet packer analysis theory, Nine characteristic values were taken into account from the aspects of explo-sion vibration and structure dynamic characteristics, such as the peak acceleration, the energy on dominant frequency bands and natural frequency bands of interior device. Because of the strong correlation between these characteristic values, the intrinsic characteristic values affecting the most target damage information were extracted by using the orthogonal rotating of factor analysis. Results show that the prediction results are ba-sically consistent with the experimental results by distinguishing target damage and prove that the choice of intrinsic characteristic values is reasonable. Finally, the structure’s damage distance curve is obtained.
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