摘要
针对某核电站两相邻200m高超大型冷却塔,基于完全气动弹性模型通过风洞试验对其风致干扰效应进行研究.研究表明:干扰效应使共振响应显著增大,但仍以背景响应为主;双塔串列时,尽管由于上游塔的'遮挡'效应使得下游塔最大平均响应减小,但最大均方差由于干扰效应略有增大,响应极大值基本与单塔一致;斜列时,当上游塔尾流作用在下游冷却塔时,响应放大系数最大;基于整塔响应极大值定义的干扰因子可保证将单塔风荷载放大干扰因子倍后得到的最大响应与群塔的最大响应相等,由此考虑风向频率后得到的推荐干扰因子与规范值基本一致.
Wind tunnel tests were conducted to study the wind induced interference effect on two adjacent 200m high super large cooling towers based on full aero-elastic model.The test result indicated that interference effect significantly increased resonance response,but background response played a major role in the total displacement response.The largest average response of the downstream tower reduced due to the shielding effect caused by the upstream tower when the towers were ＂in tandem＂.However,wind-induced interference resulted in an addition on root of variance which made the maximum response basically identical to the single tower.Also,the max response magnification factor was found when the tower was in the wake of upstream tower.In addition,the interference factor defined by the max response of the tower could guarantee the max response produced by the loads equal to single tower loads multiplied by the interference factor consistent with group towers,and to the recommended interference factor which took into account the frequency of wind direction basically in accordance with the value in code.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第12期1-7,共7页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50908085)
关键词
冷却塔
完全气动弹性模型
风洞试验
干扰效应
风致响应
cooling tower
full aero-elastic model
wind tunnel test
interference effect
wind-induced response
