超高压长短腿输电塔风致动力反应研究

Dynamic wind-induced response analysis of UHV transmission tower with unequal legs

以500 kV长短腿输电塔为研究对象,采用谐波叠加法生成作用在输电塔上的风速时程,利用ANSYS软件,在0°、45°、60°、90°4种不同攻角风荷载作用下对输电塔的位移、支座反力以及主材内力进行计算.分析表明,不同风攻角对于输电塔的位移、支座反力及塔柱主材的轴力都会产生比较大的影响,其中,45°攻角对于长短腿猫头直线塔的位移影响最大,90°攻角对于输电塔支座反力与塔柱轴力影响最大.

Taking 500 KV linear transmission tower with unequal legs as the research object,histories of wind velocity are simulated with the harmony superposition method.The displacements of tower,the support reaction and the axial force of the tower are calculated with ANSYS under the four incidences of wind load.The analysis shows that the different wind attack angles have a greater effect on the displacements of tower,the support reaction and the axial force of tower.The attack angle of 45° has the most significant effect on the displacement of tower,but the support reaction on the axial force of tower have the maximum values with the attack angle of 90°.