【摘要】 通过建立被测构件与压电正交异性复合材料(OrthotropicPiezoelectricCompositeMaterials,OPCM)传感元件的三维有限元(FiniteElementModel,FEM)模型研究OPCM的动态传感特性.采用对被测构件施加冲击载荷的方法获得传感元件输出的电压时域信号,并进行傅立叶变换分析,计算和实验结果都表明OPCM传感元件对同平面内相互正交的应力波具有不同的频响特性,且两者之间有较好的吻合性.更多还原

【Abstract】 This paper studis the dynamic characteristics of the OPCM (Orthotropic Piezoelectric Composite Materials) sensor by making 3-D finite element model of structure and the sensor. Acquiring the output signals of sensor by a sudden press load on the structure, and analysis of the signals by Fourier transformation. Computation results are in good accord with the results of the experiment, they show that the OPCM sensor has different frequency characteristics under Orthotropic stress waves in the same plane.更多还原