Sensitive Tint Visualization of Mode Variation of Lamb wave in the Gently Varying Thickness of Glass Plate
Sensitive Tint Visualization of Mode Variation of Lamb wave in the Gently Varying Thickness of Glass Plate
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DOI：
10.11370/isj.57.529
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Kairi Suzuki;K. Imano
中科院分区：
文献类型：
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作者：
Kairi Suzuki;K. Imano
采用频闪光弹系统，引入灵敏着色法，观察了超声兰姆波在具有缓变部分的玻璃中的传播。观察了1.447MHz脉冲正弦波传播的声压随时间的变化。为了增强超声兰姆波的对比度，采用了C-MOS摄像机的减影成像。作为结果，超声压力的极性被清楚地可视化。随着兰姆波的传播，厚层部分出现兰姆波S2模的高次模，并通过S1模的锥形部分逐渐转变为薄层部分的S 0模。
Propagation of ultrasonic Lamb waves in the glass having gently tapered part is visualized by the strobe photoelastic system introducing sensitive tint method. The time transition of ultrasonic pressure of 1.447 MHz burst sine wave propagation are observed. To enhance the contrast of ultrasonic Lamb wave, subtracted image with the C-MOS camera is adopted. As the results, polarities of ultrasound pressure are clearly visualized. As the Lamb wave propagate, higher mode of S2 mode of Lamb waves in the thick part are appeared and they are gradually varied to S0 mode in the thin part via the tapered part of S1 mode.