相控阵超声检测声场近场区长度的理论  

Theoretical Study on Near-Field Length of Acoustic Field for Phased Array Ultrasonic Testing

作　　者：姜学平 岳云飞[2] 庄凤冬 毛小虎[2] 郑晖[4] 韩庆邦 JIANG Xueping;YUE Yunfei;ZHUANG Fengdong;MAO Xiaohu;ZHENG Hui;HAN Qingbang(College of IOT Engineering, Hohai University, Changzhou 213022, China;Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Changzhou 213016. China;PetroChina Jinxi Petrochemical Company Machinery Factory, Huludao 125001 ,China;China Special Equipment Inspection Institute, Beijing 100013, China)

机构地区：[1]河海大学物联网工程学院,常州213022 [2]江苏省特种设备安全监督检验研究院,常州213016 [3]中国石油锦西石化公司机械厂,葫芦岛125001 [4]中国特种设备检测研究院,北京100013

出　　处：《无损检测》2017年第10期33-36,共4页Nondestructive Testing

基　　金：国家自然科学基金资助项目(11604076;11574072;11274092);河海大学中央高校基金资助项目(2015B04714);江苏省特检院科技(科研)资助项目(KJ(Y)2016002)

摘　　要：相控阵超声检测技术可靠高效、无辐射,可应用于工业无损检测中。对于均匀各向同性材料工件,尤其是焊缝的相控阵超声检测,可采用超声斜入射脉冲横波扇形扫描检测的方法。探讨相控阵超声探头辐射不同偏转角度声场的近场区长度问题,进行了理论计算和仿真分析,发现焊缝检测中常用有机玻璃楔块角度为36.2°时,偏转角度越大,近场区长度越小。结果可为相控阵超声检测工艺设计和检测设备校准提供参考。Phased array ultrasonic testing method is of flexible, reliable, efficient and suitable for industrial nondestructive testing. Near-field length was investigated for phased array ultrasonic testing homogeneous isotropie work pieces using oblique incident pulse shear wave. The theoretical calculations of near-field length and the simulations of the acoustic field for various deflection angles in phased array ultrasound inspections were carried out. h is shown lhat the near-field length decrease with increasing deflection angles when using general plexi-glass wedge of inclination angle being 36.2°. The conclusions of this paper can provide some reference for designing the testing procedure.

关 键 词：相控阵超声检测 扇形扫描 近场区长度 聚焦声波 

分 类 号：TG115.28[金属学及工艺—物理冶金]