Structural damage monitoring method based on adaptive density peak value-hybrid probability modeling
A hybrid probability model and density peak technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., can solve the problems of complex adaptive mechanism and inability to guarantee the stability of modeling results.
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[0077] The invention will be described in further detail below in conjunction with the accompanying drawings.
[0078] In this embodiment, the loosening of structural screws is taken as a time-varying environmental factor, combined with the guided wave damage monitoring technology, and the method of the present invention is specifically described by taking the crack propagation at the edge of the screw hole under the time-varying structural boundary condition of screw loosening as an example. Implementation process.
[0079] The schematic size and position of the monitored structure and piezoelectric sensor arrangement in this embodiment are as follows figure 1 shown. Structurally, there are 3 screws and their screw holes. Two piezoelectric sensors are arranged on the structure to monitor the hole edge cracks of the structural screw holes. The piezoelectric sensor 1 is used as the excitation element of the guided wave signal, and the piezoelectric sensor 2 is used as the re...
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