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工程力学  2013 

箱型吊杆的风致振动特性

DOI: 10.6052/j.issn.1000-4750.2011.10.0675, PP. 233-238

Keywords: 风洞试验,数值模拟,紊流效应,箱型吊杆,涡振,驰振

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Abstract:

该文通过风洞试验研究了箱型吊杆的风振特性,并进一步分析了紊流对吊杆气动性能的影响。箱型吊杆会发生涡振与驰振失稳,高宽比对涡振特性存在较显著影响,对改善驰振性能作用不大。紊流对箱型吊杆涡振起振风速及锁定区间有较大影响,但紊流的作用并不总是有利的。相应的数值模拟显示,紊流是通过改变结构的St数与涡脱力的大小来影响结构的涡振特性。

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