摘要
输电线路风荷载调整系数(风振系数)的大小与结构本身和自然条件有关,其值的大小,不仅影响铁塔的安全和可靠度,也影响到塔材指标。通过计算和分析可知:杆塔风荷载调整系数zβ与杆塔的类型、高度、坡度有关,zβ值增大的主要原因是杆塔的质量增大;导地线风荷载调整系数cβ值受风速、档距、气动阻尼和地面粗糙度的影响。在输电线路设计中必须找到快捷方便地计算zβ和cβ的方法。
Transmission line wind load adjustment coefficients （aeolian vibration coefficients）, are dependent on structure itself and natural conditions. Their values not affect only tower safety and reliability, but also material requirements. It is known from calculations and analysis that pole and tower wind load adjustment coefficient depends on type, height and slope of the pole and tower, and the major cause of its increasing is the weight increasing of the pole and tower; conductor wind load adjustment coefficient depends on wind speed, span, aerodynamic damping and the roughness of the ground. Therefore, fast and convenient methods for and computation should be developed during transmission line design.
出处
《电力建设》
2007年第9期33-38,共6页
Electric Power Construction
关键词
输电线路
风荷载调整系数
脉动增大系数
气动阻尼
transmission line
wind load adjustment coefficient
pulsing accretion coefficient
aerodynamic damping
