Dynamic characteristics tests show that the naturalvibrationperiodof 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。
2
This paper presents a new method for calculating the naturalvibrationperiodof towers.
本文介绍了一种计算塔设备自振周期的新方法。
3
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 naturalvibrationperiodof the unit of structure.