【摘要】 以向家坝上海的±800 kV特高压直流线路为例,阐述特高压输电塔线体系的气动弹性模型设计与制作方法。通常的集中刚度法和离散刚度法制作的铁塔模型都很难满足气动弹性模型的要求。考虑铁塔模型刚度和气动反应两方面的情况,提出以半刚性模型节段加"U"型弹簧片的方法制作铁塔弹性模型。另外,对导线模型进行跨度方向上的缩聚解决了按统一比例无法满足风洞尺寸要求的问题。通过理论分析和实际检测对比,塔线体系模型的动力特性可以满足气动弹性试验的要求。更多还原

【Abstract】 We present an aeroelastic model design and method creation based on the case of an ±800 kV ultra-high voltage(UHV) power transmission line from Xiang Jiaba to Shanghai,P.R.China.Both the centralized and discreted stiffness modeling methods are unsuitable for tower aeroelastic modeling.Taking these stiffness and aerodynamic characteristics into account,we introduce a new method to create an aeroelastic model that includes a semi-rigid model segment and U-shaped springs.Because the span of this transmission line is too long to fit within the wind tunnel in the same proportions as the tower,the proportions of the line model is condensed further.Aeroelastic test requirements can be satisfied by comparing theoretical analysis and actual measurements of the system model dynamics.更多还原