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| Beam Damage Identification Method ResearchBased on Hilbert-Huang Transform |
| DING Qi MENG Guang LI Hongguang |
| (State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200040, China) |
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Abstract Presents a method of structural damage identification based on Spatial Hilbert-Huang Transform. Using beam as the research object, firstly, we analyzed the damage effect on the structural dynamic parameters theoretically, revealed the modal singularity caused by damage. Then we used EMD (Empirical Mode Decomposition) method to decompose the modal signal adaptively, got the characteristic frequency from Hilbert Transform, and identified the location and extent of damage effectively. The results of numerical experiment validated this method has high frequency resolution and good anti noise performance in damage identification.
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Received: 23 October 2008
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Corresponding Authors:
DING Qi
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2009, Vol. 28 
