【摘要】 采用数值模拟方法来研究横隔面在高压输电塔抗风计中的作用问题。具体步骤是:采用考虑随高度变化Kaimal风速谱和Devenport相干函数,并结合谐波合成法数值模拟线路风场;在ANSYS有限元软件中建立不同横隔面配置方式的输电塔线体系的有限元模型,用ANSYS有限元软件分别对模型进行动力特性分析及风致动力响应时程分析;分析结果显示在输电塔设计中合理配置横隔面,可以消除输电塔局部阵型过早出现,有效抑制输电塔斜撑的面外变形和降低主材内力,从而进一步提高输电塔的抗风性能。更多还原

【Abstract】 Numerical simulation is used in this paper to study effects of diaphragm on wind resistant design of power transmission towers.Firstly,using ’Kaimal’ wind speed spectral changed with height and ’Devenport’ correlation function,then combining with WAWS to simulate the wind field around lines.Secondly,many models about transmission line system at different cross section are established in ANSYS,and made analysis about dynamic characteristic and time history of wind-induced response.The results show that rational allocation of cross section in design can avoid early appearance of local modal shapes of transmission towers,effectively restrain the out-plane deformation of sprag,and reduce the force of main member.Then the wind resistance performance of transmission tower is further improved.更多还原