Abstract：Found the 2-D FEM(finite element model) of pipe structure to simulate the generation and spread about a sort of acoustic emission(AE). By coupling the correlative nodes displacement degrees of Freedom, the two dimension AE wave become three dimension to inspirit the OPCM affixed on the surface of pipe. Read the node volt to simulate the output of sensor, and made Time-Frequency Analysis of the outputting signal based on Margenau-Hill energy distributing, discuss response characteristic of OPCM in the circumstance of no noise, advocate the theory mode and design method for future sensor used in AE monitoring of pipe.
[1] 王庆菊,陈健,施从运.夹砂玻璃钢排水管道工程的施工与监理[J].排灌机械,2003,21(4):39-40[2] 梁家惠.声发射检测中的压电换能器[J].无损检测,2002,24(12):526-531[3] 赵国旗,等.基于压电正交异性分布式AE技术的初步研究[J].振动测试与诊断,2003,23(4):268-270[4] Luo Ying,Tao Baoqi.The OPCM Strain Gauges for Strain Stress Measurement of the OrthoropicMaterial Structures[J].Acta Mechanica Solida Sinica,2000,13(4):330-333[5] R Hill,S.A.Forsyth,P.Macey.Finite element modelling of ultrasound, with reference to transducers and AE waves[J].ULTRASONICS,2004,42(2004):253-258[6] F Moser,L J Jacobs.Application of finite element methods to study transient wave propagation in elastic wave-guides[J].Review of Progress in Quantitative Nondestructive Evaluation,1998,17:161-167
