Detection of corrosion defect of ground flat steel of transmission pole tower by electromagnetic ultrasonic SH wave
In order to achieve convenient and rapid detection of corrosion defects in grounded flat steel,a method based on electromagnetic ultrasonic SH wave detection of corrosion defects in grounded flat steel is proposed.A three-dimensional finite element simulation model of the grounded flat steel and its corrosion defects was established,and the propagation of SH0 waves in the grounded flat steel and the attenuation characteristics of its defect detection were analyzed.The results show that,with the increase of SH0 wave propagation distance,its echo signal displacement amplitude decreases,and the decline gradually slows down,and has a tendency to turn stable;corrosion defect depth and length will lead to an increase in the echo signal amplitude,while the corrosion defect width on the echo amplitude effect is very small.Through the test to explore the impact of different corrosion defects on the detection results,to verify the feasibility of electromagnetic ultrasound SH0 wave detection of corrosion defects of grounded flat steel.Simulation and test results show that the electromagnetic ultrasonic detection method can accurately determine the location of grounding flat steel defects.This method provides new ideas for the detection of corrosion defects of grounded flat steel in the field as well as quantitative identification,which has important reference value.
Transmission pole towersGround flat steelElectromagnetic ultrasonicSH waveFrequency dispersionDefect of corrosion
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