板壳结构的振型测量

Measurement of Mode Shapes of Vibration for Plates and Shells

应用 CCD图象传感器的线性积分成象机理 ,将时间平均成象方法与数字图象处理技术相结合提出一种新的动态光测方法 .该法只需被测对象静态参考图象及共振态的时间平均成象即可重建板壳结构的振型信息 ,并具有设备简单。

In this paper, A new method of optically dynamic measurement is presented. The method applies the linear integral imaging mechanism of the CCD image sensor and combines time average image method with digital image processing techniques. By using the method,the information of mode shapes of vibration for plates and shells can be reconstructed from their sta tic reference images and its time average images under resonance state. The method is easy and needs only simple equipment.