65台框架支承式塔设备自振周期的实测与分析

Measurement and Analysis of Natural Vibration Periods of 65 Columns with Self-support of Frame

对６５台框架塔的自振周期和振型进行实测，发现基本振型与落地塔不同，塔体呈弯曲变形而框架部分呈剪切变形。根据实测自振周期进行数理统计分析提出自振周期经验公式。并用哈密顿原理，推导出计算振型的理论公式可供设计应用。

From the result of the measurement of the natural vibration period and the vibration type for 65 columns with the self-support of frame, it is founded that the vibration type of this kind column is deferent from that of columns anchored on the ground. The bending deformation occurs on the body of the columns, however, shearing deformation occurs on the frames. The empirical equations were presented on the basis of the statistics analysis of the measured natural vibration periods. Then, the theoretical formula for calculating the displacement at any point on the column was derived by use of the Henmilton principle.