旋转孔径——时间平均散斑照相法  

ROTATING APERTURE TIME-AVERAGED SPECKLE PHOTOGRAPHY

作　　者：顾杰[1] 沈永昭[1] 

机构地区：[1]苏州大学物理系

出　　处：《力学学报》1989年第4期488-494,共7页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：本文将旋转孔径散斑照相法和时间平均散斑照相法相结合,提出了适合于研究振动模式、测定试件固有频率的新方法,该法具有精度高、非接触测量、全场显示,防震要求低等特点,文中给出了理论分析和实验证明。In this paper, we have combined rotating aperture method of speckle photography with time-averaged speckle photography to propose a new technique which is suitable for modal analysing and natural frequency detecting. The technique possesses advantages of high precision, non-contact measurement, whole-field displying, low demand for quake-proof, etc.. Theoretical analysis and experimental demonstration are presented.

关 键 词：散斑法 固有频率 激光测试 振动 

分 类 号：O348.12[理学—固体力学]