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METHOD FOR DETERMINING PLANE STRESSES ON IN-SERVICE STEEL STRUCTURE MEMBER BASED ON PHASE SPECTRUM OF ULTRASONIC TRANSVERSE WAVE
METHOD FOR DETERMINING PLANE STRESSES ON IN-SERVICE STEEL STRUCTURE MEMBER BASED ON PHASE SPECTRUM OF ULTRASONIC TRANSVERSE WAVE
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机译:超声横波相位谱的在役钢结构构件平面应力确定方法
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摘要
A method for determining plane stresses on an in-service steel structure member based on phase spectrum of ultrasonic transverse wave, including: calibrating stress-spectrum parameters k and c of a replica of the in-service steel structure member; determining a first response frequency of a phase difference and a maximum value of a derivative function of the phase difference of an ultrasonic transverse wave echo of the in-service steel structure member, and obtaining a polarization angle of ultrasonic transverse wave components generated by a birefringence effect; solving a plane normal stress difference and a plane shear stress inside the in-service steel structure member; and separating normal stresses by a shear difference method to obtain three independent plane stress components.
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