压力容器板材中氢鼓泡缺陷的超声Lamb波检测

Ultrasonic Lamb Wave Testing of Hydrogen Bubble in Pressure Vessel Plate

采用WAVE 2000数值计算软件对一16mm厚人工模拟试板的内壁鼓包缺陷进行超声Lamb波仿真模拟,模拟结果表明,采用Lamb波从外壁对压力容器板材内壁氢鼓泡检测是可行的;同时,给出了最优检测参数,为实际检测提供了Lamb波模式、频率、入射角度等参数的选择参考。根据仿真结果,采用最优检测参数对人工模拟试板进行Lamb波的实际检测试验,结果表明:该方法检测效果良好,不仅能够检出缺陷,而且缺陷定位精度也较高。

WAVE 2000 numerical software was used for ultrasonic Lamb wave simulation of the inner wall bubble defect of a 16 mm thick artificial test plate.The results showed that it was feasible to detect the hydrogen bubbles in the inner wali of pressure vessel plate by using Lamb wave from the outer wail, and the optirrlal detection parameters were given, the reference of important parameters such as Lamb wave mode, frequency, incidence angle for actual testing was provided. According to the simulation results, the optimal detection parameters were used for Lamb wave testing, which was not only able to detect defect, but also had high localization accuracy.