摘要
通过动态光弹系统,观察并分析了侧壁激励时,超声导波在板中的传播行为。分析了侧壁纵波激励时产生Lamb波和串列纵波的转换条件和原因,超声导波在传播过程中发生的波前能量衰减,以及各波列之间的能量传递。通过光弹试验以及对比检测试验,证明了在大尺度板材检测方面,采用较高频率纵波探头侧壁激励进行检测是一种可行的方法。
The behavior of ultrasonic wave propagating along plate structures using edge-mounted transducer by dynamic photo-elastic method was presented.The conversion conditions and reasons of series of longitudinal waves and the generation of Lamb wave were also presented.The wave front energy attenuation and the energy transportation between each wave series while the wave being propagating along the plate were revealed also. Through photo-elastic experiment and the comparison test,the employment of higher frequency（2 MHz） longitudinal edge-mounted transducer was verified to be a viable option for large plate structure defect inspection.
出处
《无损检测》
2011年第4期36-38,共3页
Nondestructive Testing
关键词
超声导波
光弹
储罐底板
兰姆波
Ultrasonic guided wave
Photo-elastic
Storage tank floor
Lamb wave
