超声点聚焦探头在球体中的声束发散与聚焦

中国机械工程

超声点聚焦探头在球体中的声束发散与聚焦

濮海明;王哲;康宜华

华中科技大学机械科学与工程学院，武汉，430074

出版日期:2018-06-10 发布日期:2018-06-08
基金资助:
国家自然科学基金资助项目（51275193）
National Natural Science Foundation of China （No. 51275193）

Sound Beam's Divergence and Focus of Ultrasonic Point Focusing Probes in Spheres

PU Haiming;WANG Zhe;KANG Yihua

School of Mechanical Science and Engineering， Huazhong University of Science and Technology，Wuhan，430074

Online:2018-06-10 Published:2018-06-08
Supported by:
National Natural Science Foundation of China （No. 51275193）

摘要/Abstract

摘要： 探究了点聚焦探头焦点相对于球体在不同位置时的声束传播路径，讨论了进入工件内部的超声波束的聚焦与发散情况；分析计算出点聚焦探头在球体内实际焦距的表达公式，得到实际焦距与水层厚度等参数之间的关系；利用有限元分析软件建立点聚焦探头在球体内焦距变化的瞬态仿真模型，仿真结果与理论公式计算得到的结果基本一致；最后，通过实际焦距表达式确定了检测不同半径钢球的点聚焦探头的选型和水层厚度，实验现象验证了结果的可靠性。

关键词: 点聚焦探头, 球体, 焦距, 声束路径

Abstract: Firstly， the propagation path of sound beam was researched when the focus of ultrasonic point focusing probes was at different positions of the sphere.Focus and divergence of ultrasonic beams entering workpiece were discussed.Next， the expression formula of actual focal length of point focusing probes in the sphere was calculated and analyzed.The relationship among actual focal length and thickness of water layer and other parameters was presented.Then， a transient simulation model of focal length changes of ultrasonic point focusing probes in the sphere was established by finite element analysis software.The simulation results are in good agreement with the calculated ones.Finally， actual focal length formula was used to determine the type of point focusing probes and water layer thickness when detecting different radii of spheres.Experimental phenomena show the reliability of results.

Key words: point focusing probe, sphere, focal length, sound beam path

中图分类号:

TG115.28

濮海明;王哲;康宜华. 超声点聚焦探头在球体中的声束发散与聚焦[J]. 中国机械工程.

PU Haiming;WANG Zhe;KANG Yihua. Sound Beam's Divergence and Focus of Ultrasonic Point Focusing Probes in Spheres[J]. China Mechanical Engineering.

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