摘要
建立二维有限元模型模拟管道结构中一种声发射(AE)的产生和传播,通过耦合相关节点位移自由度的方法使二维的AE波扩展成三维来激励粘贴于管道表面的正交异性压电复合材料(OPCM),读取节点电压信号来模拟传感元件的输出,并对输出信号作了基于Margenau-Hill能量分布的时频分析,讨论这种无噪声影响理想条件下,正交异性压电复合材料的动态传感特性,为以后管道AE监测中传感元件的开发提出了理论模型和设计方法。
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.
出处
《排灌机械》
2004年第6期45-48,共4页
Drainage and Irrigation Machinery
基金
国家自然科学基金项目(50375069)资助
江苏省自然科学基金重点资助项目(BK2001213)
