脉动风作用下气象钢塔的结构风振响应研究

以脉动风作用下沿海某气象钢塔的风振响应为研究对象，采用谐波叠加法对脉动风载荷进行模拟并验证其有效性，得到作用于气象钢塔各层上的脉动风载荷时历。建立塔架结构的空间三维有限元分析模型，进行有限元仿真，采用时域方法计算钢塔的风振动力响应，为气象钢塔的前期设计和振动控制提供必要的技术参考。分析结果表明，在50年一遇风载荷作用下，该气象钢塔的最大风振位移为0.013 m，在规范要求范围内，塔架设计具有合理性。

Wind induced vibration response of a meteorological towerunder fluctuating wind load

We simulated fluctuating wind load with resonance wave superposition method and validated its effectiveness with wind induced vibration response of a meteorological tower under fluctuating wind load as a subject. We also acquired fluctuating wind load instances applied at every layer of the tower. We further established 3 D finite element analytical model for the tower and calculated wind induced vibration response of the tower with time domain analytical method. This provided a necessary reference for early design and vibration control of a meteorological tower. Analytical results show that its maximum wind induced vibration displacement is 0.013 meters under wind load of once in fifty years. This is in the range of design requirements, so the tower design is reasonable.