表面脉冲超声波沿曲面爬行的可视化研究

Visualization of ultrasonic surface pulse waves creeping on a curved surface

为了研究超声表面脉冲波在钢、铁等不透明曲面材料中的传播规律,我们采用和金属材料声速比较接近的光学玻璃作样品,利用研制的数字化动态光弹系统,分析了表面波和次表面波沿玻璃圆棒侧面传播时的行为,记录了不同时刻的横截面上的脉冲声场传播图像,求出了表面波和次表面波沿曲面爬行的传播速度。

To study propagation of ultrasonic surface pulse waves in steel, iron on other opaci materials, we adopt optical glass as sample of study in which sound velocity is close to the velocity of metal materials. The propagation behaviors of the surface waves on the cylindrical surface of a glass cuiulan rod are analyzed by the means of dynamic digital photoe- lasticity technique. At different times, the images of the pulse waves propagating along the cylindrical surface are recorded. The propagation velocites of the surface waves creeping on the curved face are measured.