Active monitoring and evaluating method for directional damage of engineering structure
An engineering structure and directional technology, applied in the measurement device, processing the response signal of the detection, using the sonic/ultrasonic/infrasonic wave for material analysis, etc., can solve the problems of undetectable damage, limited array length, and difficult to extract. , to achieve the effect of clear characterization, significant interference suppression, and wide applicability
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[0046] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0047] Such as figure 1 Shown is the test piece and piezoelectric layout of an embodiment adopted by the method for active monitoring and evaluation of directional damage of engineering structure of the present invention. The test piece is a T6061 aluminum plate structure with a size of 600mm×600mm×2mm. A coordinate system is established on the surface of the test piece, and the coordinate origin O is set to the lower left corner of the structure.
[0048] This embodiment includes the following steps:
[0049] (1) On the structure to be tested, according to the scope of the area to be tested, several sets of linear piezoelectric excitation / sensing arrays are arranged around the area to be tested. The spacing of piezoelectric elements in the array is equal, which is determined by the accuracy of damage length monitoring. Lim...
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