中国机械工程2018，Vol.29Issue(11)：1268-1273,6.DOI:10.3969/j.issn.1004-132X.2018.11.002
超声点聚焦探头在球体中的声束发散与聚焦
Sound Beam's Divergence and Focus of Ultrasonic Point Focusing Probes in Spheres
摘要
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.关键词
点聚焦探头/球体/焦距/声束路径Key words
point focusing probe/sphere/focal length/sound beam path分类
矿业与冶金引用本文复制引用
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,2018,29(11):1268-1273,6.基金项目
国家自然科学基金资助项目(51275193) （51275193）
