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基于高频天平测力试验对宿迁电视发射塔进行了随机风致振动响应分析。“串联多质点系”力学模型被用来模拟电视塔结构,每层质点可考虑两个水平方向的平动位移和绕竖向参考轴的转动位移。通过计算确定了该电视塔不同高度上的风致振动位移响应、加速度响应。计算结果表明,电视发射塔天线部分鞭梢效应显著;采用不同的设计规范计算时,结构的加速度响应区别较大;对于上部质量集中的高耸结构直接按照规范计算底部倾覆弯矩偏小。
Based on the high frequency balance force test, the random wind induced vibration response of Suqian TV tower was analyzed. The “tandem multi-particle system” mechanical model is used to simulate the structure of a television tower. Each layer of particle can consider two translational translations in horizontal direction and rotational displacement about vertical reference axis. Through the calculation, the wind-induced vibration displacement response and acceleration response at different heights of the tower were determined. The calculation results show that the whiplash effect of the antenna of the TV tower is significant. The acceleration response of the structure is quite different when calculated by different design codes. For the high-rise structure with the upper mass concentrated, the overturning moment at the bottom is calculated directly.