论文部分内容阅读
多回路输电塔由于质量与面积沿杆塔高度存在突变,按照规范公式求解风振系数将偏于危险。基于杆塔的集中质量模型,对输电塔风振系数的频域分析方法进行了探讨,推导了考虑背景响应的等效静力风荷载计算公式。通过比较阐明了多回路输电塔风振系数沿塔高的变化特点,分析了背景响应分量对风振系数的影响,并建议在进行多回路输电塔的抗风设计时,采用杆塔多阶振型的CQC组合计算等效风荷载。
Multi-circuit transmission towers due to the quality and size of the tower there is a sudden change in height, according to the formula to solve the wind-induced vibration coefficient will be partial to danger. Based on the concentrated mass model of tower, the frequency domain analysis method of wind-induced vibration coefficient of transmission tower is discussed, and the equivalent static wind load calculation formula considering background response is deduced. By comparing and clarifying the characteristics of wind-induced vibration coefficient of tower with multi-circuit, this paper analyzes the influence of background response component on wind-induced vibration coefficient. It is suggested that multi-circuit transmission tower should adopt multi-stage vibration mode The CQC combination calculates the equivalent wind load.