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工程力学  2014 

风雨共同作用下高压输电塔的风洞试验及反应分析

DOI: 10.6052/j.issn.1000-4750.2012.09.0634, PP. 72-78

Keywords: 输电塔,雨荷载,风洞试验,气弹模型,相似准则,风雨荷载缩尺比

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Abstract:

该文介绍了雨荷载计算公式推导、高压输电塔气弹模型设计及气弹模型风洞试验。在已有研究成果基础上,该文从另一思路出发,考虑输电塔前后立面同时承受雨滴冲击作用,推导出一种改进的雨荷载计算公式,通过编程模拟得到风雨荷载时程曲线;根据相似准则,制作了风洞试验气弹模型,进行动力标定测试,并与模型的期望频率进行对比,验证了制作模型的准确性;根据雨荷载的压强计算公式,在此相似理论基础上得到风洞试验中风雨荷载缩尺比,通过输电塔气弹模型的风雨激励试验,验证了理论计算的可行性和有效性。

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