TOFD技术的检测盲区计算和分析
Calculation for the Blind Zone of TOFD Testing Technology and its Characteristic Analysis
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摘要: 对TOFD盲区计算公式中的直通波脉冲时间宽度tp的取值进行了讨论,试验修正了公式计算结果。分析了上、下表面盲区的特性,归纳了相关影响因素。研究了焊缝型式和形状对检测盲区的影响,并使用CIVA软件进行了盲区的计算机仿真计算。Abstract: The parameter tp (time width of through wave) of TOFD testing technique was discussed. The calculation formula was modified with the comparison testing results. Blind zone was analyzed and calculated on the characteristics of the upper and bottom surface, and the effective factors were concluded. Furthermore, the effect caused by the welding groove type and configuration on the blind zone was investigated, and the blind zone simulation was conducted in the computer by software CIVA.