Submarine pressure hulls must withstand high hydraulic pressure and be free of defects. To improve the precision of defect detection, we herein examined different probes for optimal defect assessment by applying the Phased Array Ultrasonic Testing (PAUT) method. Two sets of probe design parameters were selected by considering pressure hull characteristics and analyzed through modeling. PAUT probes were applied, and defect assessment results were compared based on ultrasonic signals of various simulated defects in specimens designed to be the same as actual pressure hulls. The final selected design parameters for the submarine probe, which were designed to minimize the grating lobe of wave interference effect and improve the ultrasonic resolution of pressure hull welds, were identified through the experiment. The improvement in the probe's ability to detect defects in a pressure hull was verified. Furthermore, the accuracy of defect length measurement was improved, enhancing the applicability of the technique.

潜艇压力船体必须承受高液压压力且没有缺陷。为了提高缺陷检测的精度，我们在本文中通过应用相控阵超声测试（PAUT）方法检查了不同的探头，以进行最佳的缺陷评估。考虑压力船体特性选择了两组探头设计参数，并通过建模进行了分析。应用PAUT探头，并根据与实际耐压船体相同的样本中各种模拟缺陷的超声信号，比较缺陷评估结果。通过实验确定了为海底探头选择的最终设计参数，这些参数旨在最大程度地减小波瓣波的干扰效应并提高耐压船体焊缝的超声分辨率。探针的改进 验证了检测压力船体缺陷的能力。此外，提高了缺陷长度测量的准确性，增强了该技术的适用性。