车轴横波聚焦探头的研制
Study on Transverse Wave Testing of Rail Axle with Focusing Probe
摘 要
利用几何声学原理，研究了在火车车轴圆周面上扫查时声波的传播规律，分析了声波的发散特性和聚焦条件，设计了5晶片聚焦探头，进行了探头性能测试和探伤试验。测试结果表明，5晶片聚焦探头聚焦效果明显，在探测深度为160 mm时，其声场强度较等面积单晶片探头提高了5 dB以上。
火车车轴
横波探伤
聚焦探头研制
Ultrasonic testing
Rail axle
Transverse wave testing
Study of focusing probe
Abstract
The law of ultrasonic wave propagation was studied according to geometrical acoustics principle while scanning on rail axle convex surface. The divergence characteristics and focusing condition of ultrasonic wave in rail axle were analyzed. Five-crystal focusing probe was designed and the probe performances were experimented. Results indicated that the focusing effect of five-crystal probe was obvious and the wave amplitude was 5 dB more than the single-crystal probe with the same size at a testing depth of 160 mm.
中图分类号 TG115.28
所属栏目 试验研究
基金项目 铁道部科技研究开发计划项目（2001J018）
收稿日期 2006/4/21
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备注涂占宽(1972-)，男，博士研究生，助理研究员，主要从事铁路领域的无损检测技术研发及铁道产品质量的无损检测工作。
引用该论文: TU Zhan-kuan,LI Lian-xiu,CHENG Zhi-yi,WANG Wei. Study on Transverse Wave Testing of Rail Axle with Focusing Probe[J]. Nondestructive Testing, 2007, 29(9): 543～545
涂占宽,黎连修,程志义,王 伟. 车轴横波聚焦探头的研制[J]. 无损检测, 2007, 29(9): 543～545
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参考文献
【1】黎连修.车轴纵向横波探伤研究[C].苏州：第八届全国无损检测大会暨国际无损检测技术研讨会,2003.
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