数字图像相关法在平板热屈曲试验中的应用研究  

Application of Digital Image Correlation Method in Plate Thermal Buckling Test

作　　者：刘宁夫 蒋军亮[1] 田敏 Liu Ningfu;Jiang Junliang;Tian Min(Aircraft Strength Research Institute of China,Xi?an 710065,China)

机构地区：[1]中国飞机强度研究所

出　　处：《航空科学技术》2019年第9期108-113,共6页Aeronautical Science & Technology

摘　　要：将基于非接触全场光学测量方法的数字图像相关法应用于网格加筋平板热屈曲试验。为了减小结构热屈曲试验中石英灯辐射加热设备和高温物体自身热辐射的影响,采用单侧加热单侧测量并通过光学滤光技术成功获得了瞬态气动加热环境下典型网格加筋平板的全场热变形,分析得到网格加筋平板在特定力载荷和支持边界条件下的热屈曲临界温升,此种非接触式高温数字图像测量方法可以作为判定结构热屈曲的重要手段。试验结果表明,数字图像相关法适用范围广、抗干扰能力强、测量精度高,在结构热屈曲试验领域具有重要的应用前景。The digital image correlation method based on the non-contact full-field optical measurement technique has been applied to the meshing stiffened plate thermal buckling experiments.In order to reduce the influence of the thermal radiation of the quartz lamp radiant heating devices and the high temperature objects in the structural thermal buckling tests.The full network reinforced flat plate successfully obtained under the instantaneous aerodynamic heating environment by the one-side heating single-side measurement and the optical filter technology.Subsequently,the critical buckling temperature rise of meshing stiffened plate was analyzed under specific force load and support boundary conditions.The non-contact high temperature digital image measurement method,which can be used as an important means to determine the structural thermal buckling.The digital image correlation method has the advantages of wide application range,strong anti-interference ability and high measurement accuracy,which has been shown in the experimental results,and it holds critical prospects in the field of structural thermal buckling tests.

关 键 词：热屈曲 数字图像相关法 网格加筋板 高温变形测量 

分 类 号：V215.4[航空宇航科学与技术—航空宇航推进理论与工程]