在相控阵超声工业无损检测中,超声换能器的声场分布直接决定着被检测区域的回波信息特征,从而影响检测结果。本文通过研究超声波在固体介质中的传播规律,建立了超声相控阵换能器在介质中辐射声场的数学模型,数值模拟了在一层、两层介质中相控阵换能器的辐射声场图,声场结果为更形象直观的了解声场变化和检测结果评估提供理论依据。
In phased array ultrasonic industrial nondestructive testing, the characteristic of acoustic fields produced by phased array transducers directly affects the testing results. In this article, the acoustic field models transmitted in single or multi-layered medium are established. Then the real acoustic fields in single and multi-layered medium are simulated. The results can be a basis for acknowledgment of real acoustic fields produced by phased array transducer in testing medium and judgment for testing performance.