湍流度对斜拉索雷诺数效应影响的试验研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (23) : 96-102.

论文

湍流度对斜拉索雷诺数效应影响的试验研究

刘庆宽1,2，赵桂辰3，安苗3，贾娅娅1,2，马文勇1,2，刘小兵1,2

作者信息 +

Tests for impacts of turbulence on Reynolds number effect of stayed cables

LIU Qingkuan1,2, ZHAO Guichen3, AN Miao3, JIA Yaya1,2, MA Wenyong1,2,LIU Xiaobing1,2

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摘要

大跨度斜拉桥斜拉索为典型的风敏感结构，并且处在复杂的湍流环境中，来流湍流度对斜拉索的气动性能影响十分显著。对斜拉索模型在不同湍流度下进行风洞试验，测得斜拉索的表面压力，对比分析同一湍流度下斜拉索气动力系数随雷诺数的变化规律，以及同一雷诺数斜拉索气动力系数随湍流度的变化规律。结果表明：湍流度使得雷诺数效应提前，湍流度越大，气动参数的雷诺数效应提前的越多；湍流度增加，迎风侧脉动风压系数也会增大；雷诺数越小，不同湍流度下斜拉索的压力系数值相差越大，而在大雷诺数下，其值越接近。

Abstract

Cable-stayed cables of a long-span stayed cable bridge are typical wind sensitive structures under a complex turbulent environment.Incoming flow turbulence has a very significant influence on aerodynamic performance of stayed cables.Wind tunnel tests were conducted for stayed cable model under different turbulences to measure stayed cables’ surface pressure.Under the same turbulence, variation law of stayed cable’s aerodynamic coefficient with Reynolds number and variation law of that with turbulence under the same Reynolds number were analyzed contrastively.The results showed that turbulence makes Reynolds number effect in advance, the larger the turbulence, the earlier the Reynolds number effect; with increase in turbulence, fluctuating wind pressure coefficient on windward side increases; the smaller the Reynolds number, the larger the differences among stayed cable’s pressure coefficients under different turbulences, while the larger the Reynolds number, the smaller the differences.

导出引用

刘庆宽1,2，赵桂辰3，安苗3，贾娅娅1,2，马文勇1,2，刘小兵1,2. 湍流度对斜拉索雷诺数效应影响的试验研究[J]. 振动与冲击, 2019, 38(23): 96-102

LIU Qingkuan1,2, ZHAO Guichen3, AN Miao3, JIA Yaya1,2, MA Wenyong1,2,LIU Xiaobing1,2. Tests for impacts of turbulence on Reynolds number effect of stayed cables[J]. Journal of Vibration and Shock, 2019, 38(23): 96-102

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