This paper presents a new method for calculating the natural vibration period of towers.
本文介绍了一种计算塔设备自振周期的新方法。
Dynamic characteristics tests show that the natural vibration period of steel frame can be prolonged with the reducing of connection rotation stiffness.
动力特性测试结果表明：随着节点转动刚度的减小，框架自振周期延长。
The theoretical values and the measured data on the installed unit show that this method can be applied to determination of the natural vibration period for a large-scale framed tower.
理论计算与实测数据表明，所述方法可以用来确定大型框架塔的自振周期。
A method for calculating natural vibration period of framed tower and a calculative example are described in this paper. The period of an industrial framed tower had been measured in the factory.
文中提出了框架塔自振周期的计算方法与计算示例，并对工业用的框架塔的自振周期进行了实测。
By analysed on vibration theory we knew that the load js a static load in mechanics of materials, when the loaded time is 6-8 times as much than the natural vibration period of the unit of structure.
通过振动理论的分析得知，材料力学中静载荷的定量标准是：当加载时间为构件系统的固有振动周期的8倍以上时，这种载荷即可认为是静载荷。
By analysed on vibration theory we knew that the load js a static load in mechanics of materials, when the loaded time is 6-8 times as much than the natural vibration period of the unit of structure.
通过振动理论的分析得知，材料力学中静载荷的定量标准是：当加载时间为构件系统的固有振动周期的8倍以上时，这种载荷即可认为是静载荷。
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