基于气弹试验大型冷却塔结构风致干扰特性分析

龙源期刊网 基于气弹试验大型冷却塔结构风致干扰特性分析

作者：柯世堂,葛耀君,赵林

来源：《湖南大学学报·自然科学版》2010年第11期

摘要：以国内某电站超大型冷却塔为对象，设计加工1∶200缩尺比等效梁格气弹模型，在同济大学TJ3风洞中，进行了冷却塔单塔测振风洞试验，在模型频率、振型、气动力参数模拟和试验易操作性方面均取得良好的较果，较好地避免了传统连续介质模型设计方法的不足；然后通过群塔风洞试验结果深入地探讨了子午向高度和环向角度变化对于所有测点位移脉动总能量、共振分量和风振系数的影响，最后总结性地获取了这类结构的风致干扰效应的基本特征.

关键词：大型冷却塔；气动弹性模型；干扰效应；风致响应；等效梁格设计法

中图分类号：TU279.741; TU332 文献标识码：A

Research on the Characteristic of Wind induced Interference

for Large Cooling Towers Based on Aero elastic Test

KE Shi tang,GEYao jun,ZHAOLin

(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji Univ, Shanghai 200092, China)

Abstract:

An aero elastic model of 1∶200 ratio of cooling tower was designed by using beam net method, and then in Tongji university TJ 3 wind tunnel, the dynamic response tests were carried out. It has been confirmed that vibration modes and aerodynamic parameters, wind vibration factors and testing feasibility meet the requirement of wind tunnel tests, and the proposed method can avoid the shortages of traditional methods. The influence of interference effect was discussed with wind tunnel tests, and some important conclusions were drawn.

Key words: large cooling tower; aero elastic model; interference effects; wind induced response; equivalent beam net design