Using the vibrationmeasuring equipment produced by B & K company of Denmark, we have measured thefree vibration frequency and the relative damping coefficient. The result is 6. 3 Hz and0. 08 respectively.

• 应用丹麦B &K公司生产的振动测量设备测得系统的自振频率为6.；3Hz；相对阻尼系数为0