Abstract:
To simply and accurately measure the location of local lamination damage in lamina structure, a local damage identification method is proposed based on the sparseness of vibration transfer rate function. This paper designs the experimental scheme of GFRP laminate vibration and collects the multi-point acceleration response data, and builds the vibration transfer rate function map using the data, and selects the local steady state frequency band and sparse the L1 norm, and analyzes the effects of different peeling positions and peeling degree on peeling damage index TD .The results show that the distribution of the damage identification index TD is in good agreement with the distribution of the actual specimen lamellination damage, and the lamination position and damage identification can have good engineering application value.