EXPERIMENTAL STUDY ON REYNOLDS NUMBER EFFECT OF AERODYNAMIC CHARACTERISTICS OF STAY CABLES

被引：0
|
作者：
Shao L.-Y. [1 ]
Sun Y.-F. [1 ]
Chang X. [1 ]
Han P. [1 ]
Wang Y.-X. [1 ]
Liu Q.-K. [1 ,2 ,3 ]
机构：
[1] School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang
[2] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
[3] Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang
来源：
Gongcheng Lixue/Engineering Mechanics | 2023年 / 40卷
关键词：
aerodynamic characteristics; Reynolds number; stay cable; wind pressure distribution; wind tunnel test;
D O I：
10.6052/j.issn.1000-4750.2022.06.S034
中图分类号：
学科分类号：
摘要：
The stay cable is one of the main force members of cable-stayed bridges, and the study of its aerodynamic characteristics is the basis for the study of the aerodynamic characteristics of the overall structure. In order to explore the Reynolds number effect of aerodynamic force of stay cable with smooth surface, the wind tunnel pressure measurement test of stay cable section model under different wind speeds was carried out under uniform incoming flow, and the variation law of mean drag coefficient and mean wind pressure coefficient of cable-stay with Reynolds number was obtained. The results show that the mean aerodynamic coefficient of the stay cable with smooth surface has different performance in different Reynolds number regions. The mean drag is stable at 1.2 and 0.6 in the subcritical Reynolds number region and the supercritical Reynolds number region, respectively. The mean lift coefficient is 0. The mean drag coefficient decreases rapidly in the critical Reynolds number region. Correspondingly, the mean lift coefficient increases from 0 to the maximum and then decreases to 0. For the fluctuating aerodynamic force, the value of the fluctuating lift in the subcritical Reynolds number region is much larger than the fluctuating drag, which means that the cross-wind excitation of the stay cable is much larger than the along-wind excitation. The distribution of the mean wind pressure coefficient experienced a symmetric-asymmetric-symmetric variation process with the increase of Reynolds number, which reflected the variation law of laminar separation, unilateral turbulent separation and bilateral turbulent separation, and was a qualitative response to the variation trend of the mean lift coefficient. The variation trend of the absolute value of the mean base pressure coefficient at the back pressure of the stay cable was consistent with the mean drag coefficient. © 2023 Tsinghua University. All rights reserved.
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页码：120 / 125
页数：5
相关论文
共 20 条
  • [1] SEIDEL C, DINKLER D., Rain–wind induced vibrations – phenomenology, mechanical modelling and numerical analysis, Computers & Structures, 84, 24, (2006)
  • [2] CHEN Zhengqing, LI Shouying, DENG Yangchen, Et al., Recent challenges and advances on study of wind-induced vibrations of bridge cables, Journal of Hunan University (Natural Sciences), 49, 5, (2022)
  • [3] BREUER M., A challenging test case for large eddy simulation: High Reynolds number circular cylinder flow, International Journal of Heat and Fluid Flow, 21, 5, (2000)
  • [4] COUTANCEAU M, DEFAYE J R., Circular cylinder wake configurations: A flow visualization survey, Applied Mechanics Reviews, 44, 6, (1991)
  • [5] DERAKHSHANDEH J F, ALAM M., A review of bluff body wakes, Ocean Engineering, 182, (2019)
  • [6] RAGHAVAN K, BERNITSAS M M., Experimental investigation of Reynolds number effect on vortex induced vibration of rigid circular cylinder on elastic supports, Ocean Engineering, 38, 5, (2011)
  • [7] SU Mingde, KANG Qinjun, Large eddy simulation of the turbulent flow around a circularcylinder at sub-critical reynolds numbers, Acta Mechanica Sinica, 31, 1, (1999)
  • [8] LIN Zhixing, YANG Libo, LI Wenbo, Experimental Study on drag coefficients of stay-cables corresponding to wind direction along the bridge central line, Journal of Zhengzhou University (Engineering Science), 26, 1, (2005)
  • [9] ACHENBACH E., Influence of surface roughness on the cross-flow around a circular cylinder, Journal of Fluid Mechanics, 46, 2, (1971)
  • [10] ABRAHAMSEN PRSIC M, ONG M C, PETTERSEN B, Et al., Large eddy simulations of flow around a smooth circular cylinder in a uniform current in the subcritical flow regime, Ocean Engineering, 77, (2014)
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