Grid damage detection based on curvature mode difference and wavelet transform

FAN Meng; ZHANG Limei
August 2014
Journal of Hebei University of Science & Technology;Aug2014, Vol. 35 Issue 4, p384
Academic Journal
A damage detection method based on curvature mode difference and wavelet transformation is used to determine the damage location of common gird structures including square pyramid space grid structure, orthogonal space truss structure, two way diagonal lattice grids structure, three way latticed grid and honeycomb triangular pyramid grid structure. The curvature mode difference of pre- and post-damage is taken as the wavelet transform analysis signal, and it is analyzed by discrete wavelet transform using wavelet function db3, then the damage location of links will be obtained. Numerical analysis shows that this method can effectively identify single damage location and multi-damage location of grid structures after obtaining only the first mode condition.


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