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高速动光弹系统及其应用
引用本文:黄福.高速动光弹系统及其应用[J].光子学报,1991,20(4):418-422.
作者姓名:黄福
作者单位:中国工程物理研究院流体物理研究所 成都
摘    要:高速动光弹仪是动态光弹性研究的有效诊断工具,主要用于记录各种结构在动载荷作用下,不同瞬间的应力条纹图像。研究应力波的传播规律,裂纹扩展过程,固体高速变形等。通常的动光弹仪为多火花式动光弹仪。国外也有采用静态光弹仪与转镜式高速分幅相机结合的系统。我们研究调试的动光弹系统,是在高速纹影系统中加入偏振光场,即静态光弹系统、纹影系统与转镜式高速分幅相机结合。在雷管动载荷作用下,应用高压脉冲氙灯光源,单色圆偏振光亮场,获得了不同光弹模型的清晰应力条纹图像。给出应力波的传播过程和孔附近产生的应力集中现象。该系统具有摄影频率高、曝光时间短、测试灵敏度高、适于强载荷、远距离研究大尺寸光弹模型,同时具有透射式和反射式光学系统等特点。从而为动态光。弹性研究提供了有效的测试技术和诊断系统。

关 键 词:高速动光弹系统  纹影系统  高速相机  应力条纹

HIGH SPEED DYNAMIC PHOTOELASTIC SYSTEM AND ITS APPLICATION
Huang FuSouthwest Institute of Fluid Physics,CAEP Chengdu.HIGH SPEED DYNAMIC PHOTOELASTIC SYSTEM AND ITS APPLICATION[J].Acta Photonica Sinica,1991,20(4):418-422.
Authors:Huang FuSouthwest Institute of Fluid Physics  CAEP Chengdu
Institution:Huang FuSouthwest Institute of Fluid Physics,CAEP Chengdu 610003
Abstract:High speed dynamic photoelastic apparatus is an available diagnostic tool of the dynamic photoelastic Investigation. It is mainly used to record stress patterns of various structures loaded dynamically at different times; investigate propagating history of stress wave, examine development process of crack and high speed deformation of objects and so on.The dynamic photoelastic apparatus usually used multiple electric sparks as light sources. An assembly composed of static photoelastic apparatus and high speed rotating mirror framing camera was used on abroad. A system which was made up of a static photoelastic apparatus, a schlieren system and high speed rotating mirror framing camera was set up and applied by us. The stress patterns of various photoelastic models loaded dynamically have been attained, by using Xenon Flash Lamp and monochromatic circular polarization light field. The propagating process of the stress wave and stress collection phenomena around the hole were obtained. The system has some advantages: high framing rate and high measurement sensitivity. It is also convenient for the system to apply to large photoelastic models set in long distance from camera and under shock loading. There is a reflecting or a transmitting optical system to be supplied for us. Therefore, an available measuring technique has been provided for the dynamic photoelastic investigation.
Keywords:High speed dynamic photoelastic system  Schlieren photography  High speed rotating mirror camera
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