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| Damage detection method of three-dimensional truss structure based on the axial modal strain energy ratio |
| Feng Kun1 Yang Yongchun2 Zheng Yi3 |
| 1.BERIS Engineering and Research Corporation，Baotou 014010，China；2.Ocean University of China, Qingdao 266100，China； 3. Institute of Ocean Instruments, Shandong Academy of Sciences, Qingdao 266071, China |
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Abstract An improved crack inspection method based on the axial modal strain energy ratio was presented for identifying a crack in the three-dimensional truss structure. The improved method is used to predict the existence and the approximate location of the crack by using only the first two order modal parameters without the rotational freedom degree information. With the crack cases varied, the finite element model jacket platform and the broken link case of physical model will be analysis. The final results show that the proposed axial modal strain energy ratio method can effectively diagnose the three-dimensional truss structure damage.
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Received: 15 June 2011
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2013, Vol. 32 
