时间反转在列车转向架声发射源定位中的应用  

Application of time reversal on acoustic emission source localization of train bogie

作　　者：胡聪[1,2] 吴琼[1,2] 李秋锋[1,2] 卢超[1,2] 何才厚 

机构地区：[1]无损检测与光电传感技术及应用国家地方联合工程实验室,江西南昌330063 [2]南昌航空大学无损检测技术教育部重点实验室,江西南昌330063 [3]江西省特种设备检验检测研究院鹰潭分院,江西鹰潭335000

出　　处：《中国测试》2016年第12期136-139,144,共5页China Measurement & Test

基　　金：国家自然科学基金项目(11264032);江西省自然科学基金项目(20122BAB201024);国家质检总局科技计划项目(2013zjjz180);航空科学基金项目(2014ZD56007);上海航天科技创新基金项目(SAST201364);江西省教育厅科技项目(GJJ14530);无损检测技术教育部重点实验室开放基金项目(ZD201429002)

摘　　要：针对高速列车转向架的动态检测提出一种新的损伤声源定位方法,采用声发射检测技术对转向架易损伤的焊接部位进行时间反转定位方法研究。首先利用有限元软件建立转向架焊接部位结构有限元模型;然后在模型上模拟发出一个声发射损伤信号,通过预置的声发射传感器接收声发射源信号;最后根据时间反转聚焦原理对接收信号进行处理,并通过检测区域成像,确定损伤声发射源的准确位置。数值仿真实验结果表明:该定位方法能够准确定位声源位置,定位结果比常规四点圆弧法更精确。For the dynamic testing to high speed train bogie, a new damage localization method was proposed here, and the acoustic emission testing technology was applied to test welding parts of the bogie with time reversal localization method. Firstly, the welding part structure model of the bogie was established based on finite element software; And then, acoustic emission signals from simulation damage were generated from the model and the signals were then received by the preset acoustic emission sensor; Finally, the accurate location of the damage acoustic source was obtained by processing the received signals by time reversal focusing principle and imaging detection area. The numerical simulation experiment results show that this method can locate the acoustic emission source accurately, which localization precision is greater than that of conventional four points arc method.

关 键 词：转向架 声发射 时间反转 损伤定位 

分 类 号：O426.2[理学—声学]