摘要
采用成本较低、结构紧凑且使用便捷的单高速相机三维数字图像相关方法(single-camera high-speed three-dimensional digital image correlation,简称SCHS 3D-DIC)对涡轮叶片的振动特性进行试验研究。首先,介绍了测量装置和原理,以悬臂铝板为对象开展验证试验,结果证明了该测量系统的准确性与有效性;其次,开展了叶片的全场振动特性测量,得到了其三维形貌、模态特性、全场位移与应变分布,获得了叶片在振动载荷作用下的高应变区域位置及应变分布特点。研究表明,SCHS 3D-DIC方法相比常规双高速相机3D-DIC方法具有更高的视场利用率,适合于细长型的涡轮叶片的振动测量试验。
A single-camera high-speed three-dimensional digital image correlation(SCHS 3D-DIC)method,which is low-cost,compact,and easy-to-implement,is adopted to test the vibration characteristics of turbine blade by using a four-mirror adapter.Firstly,the configuration and measurement principle of the SCHS 3D-DIC system are introduced.The verification test based on a cantilever aluminum plate is carried out.On this basis,the full-field vibration characteristics of the blade are tested,in order to obtain its 3D morphology,modal characteristics,full-field displacement and strain field distribution.The position and distribution characteristics of the high-strain region of the blade under vibration excitation are determined.The results show that the SCHS 3DDIC has a higher utilization rate of field of view as compared with the conventional dual-camera 3D-DIC,which is suitable for the vibration measurement test of the slender turbine blade.
作者
谢瑞丽
许巍
陈新
潘兵
XIE Ruili;XU Wei;CHEN Xin;PAN Bing(School of Aeronautic Science and Engineering,Beihang University Beijing,100191,China;Beijing Institute of Aeronautical Materials,Aero Engine Corporation of China Beijing,100195,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2024年第1期18-23,194,共7页
Journal of Vibration,Measurement & Diagnosis
基金
国家科技重大专项资助项目(J2019-V-0006-0099)
国家自然科学基金资助项目(11925202)。
关键词
数字图像相关
涡轮叶片
振动测量
单高速相机
模态试验
digital image correlation
turbine blade
vibration test
single high-speed camera
modal experiment
