期刊文献+

轴向流对斜拉索气动稳定性影响的试验研究 被引量:5

Effect of Axial Flow on Rain-wind Induced Vibration of Stay-cables
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摘要 在特定的风雨条件下,斜拉桥的斜拉索会发生激烈的风雨振现象,这种振动会造成索-梁和索-塔锚固区结构的疲劳损伤等一系列问题。因此,研究并明确斜拉索风雨振的机理,从而找到这种振动的控制方法,已经成为紧迫的研究课题。通过风洞试验测量了倾斜索模型的轴向流强度和脉动升力的大小,分析了轴向流对卡门涡脱落的影响及对低频率成分涡的形成的影响,指出轴向流能抑制卡门涡的脱落,并促进低频率成分的涡的产生,索在这两方面因素的作用下容易发生发散振动。 In this paper, by means of wind tunnel tests, the axial flow and fluctuating lift force of an inclined cable model with artificial water rivulet are measured, and the effect of axial flow on Karman vortex shedding and on low frequency vortex shedding are analyzed. It is indicated that the axial flow can weaken the Karman vortex shedding, and at the same time it carl enhance the low frequency vortex shedding; the cable shows divergent vibration when Karman vortex shedding is weakened enough and low frequency vortex shedding is strong enough.
出处 《石家庄铁道学院学报》 2008年第4期16-19,共4页 Journal of Shijiazhuang Railway Institute
基金 国家自然科学基金资助项目(50878135/E080802) 河北省自然科学基金资助项目(E2008000442) 河北省归国人员资助项目 石家庄铁道学院科研专项资助项目
关键词 斜拉索 风雨振 轴向流 卡门涡 cable rain-wind induced vibration axial flow Karman vortex
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参考文献10

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