桥梁断面三分力系数的数值模拟计算

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摘要 The three-component force coefficient of a streamlined bridge section that varies with the Reynolds number (Re) was numerically simulated based on the computational fluid dynamics software FLUENT in studying the Re effect on a bridge section through numerical simulation. Three turbulent models were used in this paper: standard k-ε model, Reynolds stress model, and Spalart-Allmaras model. Several important conclusions were drawn by comparing results of the numerical simulation with those of the wind tunnel test. First, results of the numerical simulation and the wind tunnel test are very similar. Maximum error of the drag coefficient is less than 4%; calculation results of the lift coefficient are greater than the test result; and the relative error is less than 3%. When the Re is less than 6×10⁵, calculation results of the lift pitching moment coefficient is less than that of the test result. When the Reynolds number is bigger than 6×10⁵, calculation results of the lift pitching moment coefficient is greater than that of the test result, and calculation error is less than 6%. The study confirms the existence of the Re effect on static aerodynamic coefficients on a bridge deck. The model should be used to simulate the three-component force coefficient for a streamlined bridge section. Calculation results can meet accuracy requirement through this method.

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	李薇
	张悦
	胡兆同

关键词 ： bridge engineering, Reynolds number effect, numerical simulation, streamlined bridge section, three-component force coefficient, standard k-ε model

Abstract：The three-component force coefficient of a streamlined bridge section that varies with the Reynolds number (Re) was numerically simulated based on the computational fluid dynamics software FLUENT in studying the Re effect on a bridge section through numerical simulation. Three turbulent models were used in this paper: standard k-ε model, Reynolds stress model, and Spalart-Allmaras model. Several important conclusions were drawn by comparing results of the numerical simulation with those of the wind tunnel test. First, results of the numerical simulation and the wind tunnel test are very similar. Maximum error of the drag coefficient is less than 4%; calculation results of the lift coefficient are greater than the test result; and the relative error is less than 3%. When the Re is less than 6×10⁵, calculation results of the lift pitching moment coefficient is less than that of the test result. When the Reynolds number is bigger than 6×10⁵, calculation results of the lift pitching moment coefficient is greater than that of the test result, and calculation error is less than 6%. The study confirms the existence of the Re effect on static aerodynamic coefficients on a bridge deck. The model should be used to simulate the three-component force coefficient for a streamlined bridge section. Calculation results can meet accuracy requirement through this method.

Key words： bridge engineering Reynolds number effect numerical simulation streamlined bridge section three-component force coefficient standard k-ε model

收稿日期: 2012-01-15

基金资助:Supported by the National Natural Science Foundation of China (No.50578014)

通讯作者: LI Wei, liwei0087@126.com E-mail: liwei0087@126.com

引用本文:

李薇, 张悦, 胡兆同. 桥梁断面三分力系数的数值模拟计算[J]. Journal of Highway and Transportation Research and Development, 2013, 7(2): 46-49.
LI Wei, ZHANG Yue, HU Zhao-tong. Numerical Simulation of the Three-Component Force Coefficient of a Bridge Section. Journal of Highway and Transportation Research and Development, 2013, 7(2): 46-49.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2013/V7/I2/46

[1] HE Han-xin,LIU Jian-xin. Study on Wind-resistant Measures and Their Optimization for Long-span and Slender Suspension Bridge[J].Journal of Highway and Transportation Research and Development, 2011, 27(3):93-97,102. (in Chinese)
[2] ZHAO Kai, LI Yong-le, OU YANG-wei, et al. Aerostatic Instability Characteristic of Long-span Cable-stayed Bridges[J]. Journal of Highway and Transportation Research and Development, 2011,28(8):67-72. (in Chinese)
[3] SCHEWE G, LARSEN A. Reynolds Number Effects in the Flow around a Bluff bridge Deck cross Section[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1998, 74/76:829-838.
[4] MURAKAMI S. Comparison of Various Turbulence Models Applied to a Bluff Body[J].Journal of Wind Engineering and Industrial Aerodynamics, 1993, 46/47:21-36.
[5] LI Jia-wu, ZHANG Hong-jie, HAN Wan-shui. Wind-induced Response of Cable-stayed Bridge with Consideration of Reynolds Number Effect[J]. China Journal of Highway and Transport, 2009, 22(2):42-46. (in Chinese)
[6] LI Jia-wu, LIN Zhi-xing, XIANG Hai-fan. Study on the Reynolds Number Effect of Two Extreme Bridge Sections[J]. Journal of Zhengzhou University:Engineering Science Edition, 2003, 24(2):22-25. (in Chinese)
[7] LI Jia-wu, CUI Xin, ZHANG Hong-jie. Influence of Surface Roughness on Reynolds Number Effects[J]. Journal of Chang'an University:Natural Science Edition, 2009, 29(2):56-59, 64. (in Chinese)
[8] BAI Hua, LI Jia-wu, HU Zhao-tong, et al. Identification of Reynolds Number Effect of Tri-component Force Coefficient of Streamline-liked Section[J]. Journal of Architecture and Civil Engineering, 2007, 24(4):60-63. (in Chinese)
[9] LOU Xiao-feng. Numerical Simulation of Aerodynamic Characteristics of Bridge Section.[D].Shanghai:Tongji University, 2002. (in Chinese)
[10] LI Jia-wu. Research on Reynolds Number Effect s of Bridge Deck Section and the Effects-restraint[D].Shanghai:Tongji University, 2003. (in Chinese)
[11] CUI Xin. Investigation into Reynolds-number Effects of Streamline-like Bridge Deck Section and Mitigating Measure[D]. Xi'an:Chang'an University, 2008. (in Chinese)
[12] LI Wei, HU Zhao-tong, LI Jia-wu. An Investigation of the Reynolds Number Effect of Static Aerodynamic Coefficients in Bridge Deck Using CFD[J]. Journal of Chang'an University:Natural Science Edition, 2011, 30(6):44-49. (in Chinese)