特高压输电塔气弹模型风洞试验研究

为进一步了解特高压输电塔风振响应的特点,以正在建设的淮南-上海1000kV特高压线路中的一基双回路直线塔为原型,采用离散刚度法制作了输电塔气弹模型,进行了输电塔在紊流场中不同风速、不同风攻角下的气弹模型风洞试验.试验结果表明:输电塔模型的响应随风速的增大而增大;位移响应受风攻角的影响比较明显,在15°风时位移响应最大;各试验工况下,输电塔模型横风向的振动比较显著,X向和Y向的加速度响应处于同一量级且数值比较接近;Y向的加速度响应在0°风时最大,X向的加速度响应在90°风时最大,但任何工况下,输电塔X向的加速度响应均大于Y向的加速度响应.

Wind Tunnel Test on Aeroelastic Model of UHV Latticed Transmission Tower

An aeroelastic model was designed with discrete stiffness method to investigate the wind-induced response of UHV transmission tower. Prototype structure is a typical suspension tower, a part of 1000kV UHV double-circuit transmission line from Huainan to Shanghai. Wind tunnel test on the model has been conducted with different wind speeds and wind directions in a turbulent flow. According to the results of the test, it is obtained that wind-induced response of the model increases with the wind speed, displacement reaches maximum at 15o wind angle of attack, the vibration response of X-direction is close to that of Y-direction and the transverse response is evident. And acceleration response on the Y-direction reaches the maximum at 0o wind angle of attack, while X-direction reaches the maximum at 90o wind angle of attack, but for all cases acceleration RMS of X-direction is more evident than that of Y-direction.