覆冰四分裂导线节段模型驰振风洞模拟试验

Wind-tunnel test for galloping of iced quad bundle conductors

设计制作覆冰四分裂导线节段模型驰振风洞模拟试验系统,利用位移测量装置和数据采集系统记录导线节段模型驰振过程中垂直和水平位移的时间历程以及运动轨迹。试验得到典型厚度新月形和扇形覆冰四分裂导线节段模型在典型风速下的驰振响应。进一步建立覆冰导线节段模型的有限元模型,利用已获得的舞动数值模拟方法模拟其驰振过程,得到与试验一致的结果,从而验证了舞动数值模拟方法的正确性。试验结果为覆冰导线舞动研究提供了重要的参考数据。

Wind-tunnel test system for galloping of iced quad bundle conductor was designed and set up. The vertical and horizontal displacement responses,together with galloping traces of the iced conductor segment models were measured and recorded by means of displacement measurement equipment and computer data acquisition system.The galloping responses of two conductor segment models,respectively covered with the crescent-shaped and sector-shaped ice model,under typical wind speed were obtained by means of wind-tunnel tests.The finite element models of the two test models were set up and their galloping responses were numerically simulated with the numerical simulation method for galloping of iced bundle conductors previously presented by the authors,and the agreement of the numerically determined displacement responses and galloping traces of the segment models and those obtained by the wind-tunnel tests justified the numerical simulation method.The results of the wind-tunnel test provided important data for the investigation on galloping of iced bundle conductors.