High-order longitudinal wave guide measuring method of steel strand prestress
A measurement method and technology for steel strands, which are applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problem that the size of prestress cannot be measured quickly and accurately in-service, and achieve low labor intensity, convenient detection and high efficiency. Effect
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[0025] Provide the embodiment that following numerical simulation obtains in conjunction with the content of the inventive method:
[0026] (1) Install the excitation sensor 2 and the receiving sensor 3 in the same steel strand 1 with a distance of L 0 = 3.96m. In this embodiment, the steel strand has 7 cores, the nominal diameter is 17.80 mm, the diameter of the central steel wire is 6.30 mm, the diameter of the peripheral steel wire is 6.00 mm, and the pitch is 280 mm, then the propagation distance of the longitudinal mode in the peripheral steel wire is L = 3.96 × 280 2 + [ 2 π × 6.00 2 + 6.30 2 ...
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