一、方法的简介 1.光测法 当偏振光通过受载荷作用的透明塑料模型(光测模型)时,模型各点将产生与应力状态相关联的光学干涉条纹图案——应力光图(等色线及等倾线)。用偏光弹性仪,可以定量地量测应力光图,进而对模型作全面的应力分析。若模型及作用于其上的载荷与真实结构(原型)相似,则根据相似原理,可将模型应力转换为原型应力。上述 I. INTRODUCTION OF THE METHOD 1. Photometric Method When the polarized light passes through a transparent plastic model (photometric model) under the action of a load, various patterns of optical interference fringes associated with the stress state are produced at various points in the model - the stress light pattern Color lines and isostrophe). With the polarization elastic meter, the stress light spectrum can be quantitatively measured, and then a complete stress analysis of the model can be made. If the model and the load acting on it are similar to the real structure (prototype), the model stress can be converted to prototype stress according to a similar principle. Above