排塔的自振周期

排塔的自振周期特别是最初三阶的自振周期是动力分析的重要参数。作者着重讨论了沿排列方向排塔的弯曲振动。利用支承条件与连接条件建立振动微分方程式并导出了矩阵方程。令此方程的系数矩阵行列式为零，借助于IBM-PC微机可以迅速计算出排塔各阶的纵向自振周期。计算结果与现场测得数据能很好地相符。

A STUDY ON THE NATURAL VIBRATION CYCLE OF COUPLED IN-LINE TOWERS

The natural vibration cycles of coupled in-line towers, especially its first three model vibration cycles, are the important in dynamic analysis. In this paper the authors discuss emphatically the bonding vibration along the longitudinal direction of coupled in-line towers. Using the supporting and connecting conditions of the towers, the differential vibration equations are obtained and reduced to a matrix equation. With the determinant of the matrix of coefficients of this equation set to zero, the natural vibration cycles of coupled in-line towers can be obtained rapidly by IBM-PC microcomputer. The results are in good agreement with the experimental data measured in the field.