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引言测量物体离面振动的振型,目前一般使用全息时间平均法,它具有很高的灵敏度,但测试的振幅较小,且对仪器的稳定性和测量技术都有较高的要求,而工程结构振动的振幅往往较大。现我们试用了同步闪光法和影象云纹法相结合来测量物体离面振动的振型。从初步实验结果来看,这种测试方法可以发展成一种实用的方法。原理同步闪光法是将运动着的物体转化为静止物体的一种手段,可通过闪光法来测量运动物
Introduction To measure the vibration modes of out-of-plane vibration of an object, the holographic time-average method is currently used, which has high sensitivity, but the amplitude of the test is small and has high requirements on instrument stability and measurement technology. The amplitude of structural vibration tends to be large. Now we have tried the synchronous flash method and image moiré method to measure the vibration mode of the out-of-plane vibration of the object. From the preliminary experimental results, this test method can be developed into a practical method. Synchronous flash method is the principle of the moving objects into static objects as a means of flashing method can be used to measure the movement