讨论圆截面弹性细杆在黏性介质中的平面振动。
The planar vibration of a thin elastic rod with circular cross section in viscous medium is discussed.
试验表明这一装置可以满意地测量两维平面振动，亦可用于两维平面运动的测量。
The test shows that two dimensional planar vibration as well as the movement in two dimensional plane can be satisfactorily measured by thin device.
通过敲击试验得到墙体出平面振动频率，该频率相对较高，远离地震动卓越频率。
The wall out-of-plane frequency of vibration is obtained shaking by beating experiment. And the relatively high out-of-plane frequency of vibration is far from the earthquake predominant frequency.
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