首先采用CIVA仿真软件建立了双相不锈钢各向异性焊缝模型,对声场分布和缺陷响应进行了模拟和计算,然后基于ISO 13588-2019和ISO 22825-2017进行了工艺验证,最后采用CIVA仿真制定的相控阵工艺对现场FPSO船体管道进行了检测和缺陷解剖验证。结果表明,CIVA仿真对于各向异性不锈钢焊缝相控阵检测工艺的制定具有较好的指导作用,DMA探头在各向异性焊缝的相控阵检测中具有较高的信噪比和缺陷检出率。研究为FPSO船体管道相控阵超声检测提供了可行的技术方案。

First, the model of duplex stainless steel anisotropic weld was established by using CIVA simulation software, and the sound field distribution and defect response were simulated and calculated. Then, the process validation was carried out based on the standard ISO 13588-2019 and ISO 22825-2017. Finally, the on-site FPSO hull pipeline was inspected and the defect dissection was verified by using the phased array technology developed by CIVA simulation. The results show that the CIVA simulation has a good guiding role in the development of the phased array inspection process for anisotropic stainless steel welds. The DMA probe has a high signal-to-noise ratio and a high defect detection rate in the phased array inspection of anisotropic stainless steel welds. This research provides a feasible technical scheme for phased array ultrasonic testing of FPSO hull pipes.