摘要
针对脉动风场各种模拟方法的适用性问题,在相同的输电塔线实例上进行模拟方法的应用,对比各种方法的计算效率和计算结果,分析各种模拟方法的适用性和等价性,最后探讨单塔和塔线体系计算结果的差异。研究表明:基于POD分解的WAWS法不存在风速互谱密度矩阵无法分解的情况,计算效率较高,因此推荐使用。考虑三维风场后响应的脉动均方根比一维风场大;塔线体系中计算得到的响应均方根比单塔大。
Different wind field simulation methods are applied to the same transmission line to illustrate whether these methods are suitable to simulate fluctuating wind field. The calculating efficiency and results based on these methods are compared and the applicability of these methods is studied. The difference be- tween the results based on the model of an isolated tower and transmission-line system is also investigated. Results from this study show that, the WAWS method with POD decomposition is highly recommended be- cause this method is quite efficient and does not encounter the problem that the cross spectrum matrix of wind velocities cannot be decomposed. The root-mean-square responses of the transmission tower considering three dimensional wind fields is larger than those considering one dimensional wind field. The root-mean- square responses of the tower line system are also larger than those of the isolated tower.
出处
《空气动力学学报》
CSCD
北大核心
2013年第1期69-74,共6页
Acta Aerodynamica Sinica
基金
国家自然科学基金(51178425)
浙江省电力公司科技项目(ZDK025-2011
ZDK088-2011)
关键词
风场
模拟
输电塔
风振响应
时域分析
wind field
numerical simulation
transmission tower
wind-induced response
time domain analysis
