【摘要】 以西江500kV同塔四回路大跨越塔工程为例,介绍了大跨越塔的结构设计。采用Davenport风速功率谱函数,模拟了大跨越塔线体系的风速时程曲线。运用人工模拟的风速时程曲线,采用直接积分Newmark法计算了大跨越塔线体系的风振响应,分析了大跨越塔线体系的风振响应,给出了风振系数建议值,并将风振系数理论计算值与风洞试验结果进行了比较。计算结果可为同类大跨越塔工程作为参考。更多还原

【Abstract】 Taking the project of Xijiang 500kV four circuits on one large-span transmission tower as an example,the structural design of the large-span transmission tower was introduced.Davenport wind speed spectral density function was used to simulate wind speed of the large-span transmission tower-line system.Using direct integration Newmark method,numerical simulated wind speed time series was employed to investigate the wind-induced vibration of the large-span transmission tower-line system.The recommended value of wind vibration coefficient was proposed and compared with its value of wind tunnel experiment.The results can be used as a reference for similar large-span transmission tower.更多还原