摘要
波导杆是特殊工况下声发射检测的一种辅助工具,波导杆起到传递声发射信号的作用,但是声发射信号在波导杆中传播时会产生衰减,这会影响到检测结果。针对上述问题,根据应力波在波导杆中传播的基本理论,利用ABAQUS软件建立波导杆导波特性的数值模型,模拟了不同长度、不同直径的波导杆对应力波传播特性的影响。通过对模拟结果的对比分析,确定直径为6mm、长度不超过0.5m的波导杆对应力波的衰减小,对声发射信号强度基本没有影响。模拟结果与实验结果具有良好的一致性。
Wave-guiding rod is an auxiliary detection tool of acoustic emission(AE)testing in special conditions and plays the role of the transfer of AE signals.But the AE signals propagating in the wave-guiding rod will produce attenuation,which would affects the test result.In response to this problem,according to the theory of stress wave propagation in the wave-guiding rod,established the wave-guiding rod of wave-guiding properties numerical model by ABAQUS software.We simulated stress wave propagation of wave-guiding rod in different lengths and diameters.By comparing the simulation results,selected the wave-guiding rod of the diameter of6mm,the length no more than0.5m of wave-guiding rod which has no effect to AE signals with the minimal attenuation of stress wave propagation.Results show that the simulation and experimental were in well consistency
作者
宋美萍
王旭磊
Song Meiping;Wang Xulei(Northeast Petroleum University College of Electronics Science,Daqing,163318)
出处
《石化技术》
CAS
2017年第1期74-75,共2页
Petrochemical Industry Technology
关键词
声发射检测
波导杆
导波特性
数值模拟
Acoustic emission
Wave-guiding rod
Wave-guiding properties
Numerical simulation
