为了实现大型航空钛合金电子束焊接件的无损检测,采用超声相控阵环阵喷水检测系统.基于此系统,需要为选用的超声相控阵环阵探头设计水套.首先依据CIVA仿真软件计算超声相控阵探头声场曲线,通过讨论水套内腔直径及内腔形式,获得水套设计参数.然后设计四种水套并对钛合金试块进行试验.结果表明:水套内腔曲线应当完全包络声场曲线;水套内腔直径比内腔结构对检测效果影响大;采取直筒形水套能获得最佳检测效果.最后通过现场检测,发现采取直筒形水套灵敏度高,能满足现场检测要求.

Ultrasonic annular array water spray testing system was applied to detect electron beam welded defects of major aviation titanium alloy weld assembly.Based on the system,water jet was designed for ultrasonic annular array probe.According to probe sound field curve calculated by CIVA-software,lumen diameter and lumen shape were discussed in order to obtain designing parameter of water jet.Afterwards four types of water jet were designed for the experiment.In view of the experiment it was concluded that the water jet lumen curve should contain probe sound field curve,lumen diameter had greater effect on detection than the lumen shape and adopting vertical wall cylinder water jet could achieve the best effect of detection.In the end,field test verified that using vertical wall cylinder water jet could achieve high sensitivity and meet the needs of the field test.