不同参数对超声波在玻璃钢复合材料中传播特性影响数值仿真研究

Numerical Simulation Research on the Influence of Different Parameters on the Propagation Characteristics of Ultrasonic Wave in FRP Composites

玻璃钢材质被广泛应用于压力容器制作,目前常用的检测手段为声发射检测技术,由于该材质具有各项异性特点,声波在玻璃钢材质中的传播情况较为复杂,这给玻璃钢压力容器检验检测工作带来一定困难。利用ABAQUS有限元仿真软件,探究了检测角度、玻璃钢厚度、激励频率对声波在玻璃钢中传播速率的影响。由仿真结果可知,玻璃钢厚度越大,激励频率越高,声波在玻璃钢材质中传播速率越快,同时衰减也更快;超声波在其纤维方向比非纤维方向的声速要大,纤维方向的衰减也比非纤维方向要大。

FRP materials was widely used in the production of pressure vessels,and the current commonly used detection method was acoustic emission detection technology.Due to the various characteristics of the material,the propagation of sound waves in the FRP material was more complicated,and the inspection and detection of this FRP pressure vessel brought certain difficulties.Using ABAQUS finite element simulation software,the influence of detection angle,FRP thickness,and excitation frequency on the propagation of sound velocity in FRP was explored.The simulation results showed that,the greater the thickness of FRP,the higher the excitation frequency,the faster the sound wave propagates in FRP material,and the faster the attenuation.The ultrasonic velocity in the fiber direction was larger than that in the non fiber direction,and the attenuation in the fiber direction was larger than that in the non fiber direction.