紊流风特性参数对方形结构表面脉动风荷载影响研究
|
摘要
紊流风特性参数如紊流强度与紊流积分尺度的试验模拟精度会影响风洞试验结果,导致不同的风振响应.为得到影响规律,分析了紊流风特性参数对方形结构表面脉动风荷载的影响.为减小干扰因素,利用格栅形成局部紊流场,在此流场中研究紊流强度或紊流积分尺度单参数变化,其它参数不变对结构表面脉动风荷载分布规律的影响.结果表明:方形结构底部区域的概率分布曲线与高斯分布吻合较好,随来流紊流强度增大,分布曲线较高斯分布偏移幅度有增大趋势.紊流强度增大会导致脉动风压系数增大,方形结构迎风面中上部区域对紊流强度非常敏感.紊流积分尺度对脉动风压系数的影响很小,来流积分尺度越大,水平相关性与竖向相关性越好.
Turbulent parameters such as turbulence intensity and integral scale test simulationprecision influence the structural wind-induced vibration test results.In order to obtainthe rules,this paper analyzed the laws about the effects of turbulent parameters onsurface fluctuating wind load of square structure.The grille was used in wind tunnel toform same identical turbulence intensities but different integral scale wind fields,andsame identical integral scale but different turbulence intensity wind fields.Make theother turbulent parameters as a constant,studied the effects of a single parameter suchas turbulence intensity or integral scale on structural surface wind pressure distribution.The results show that the probability distribution curve of square structural base area isgood agreement with the Gauss distribution.With the increasing of the turbulenceintensity,the offset range of the distribution curve compared with the Gauss curve hasan increasing trend.The fluctuating wind pressure coefficient increases with theincreasing of turbulence intensity on the square structural surface,and the middle andupper area of windward surface are sensitive to the turbulence intensity.Turbulenceintegral scale has little effect on the fluctuating wind pressure coefficient,and the largerturbulence integral scale,the better horizontal correlation and vertical correlation.
Turbulent parameters such as turbulence intensity and integral scale test simulationprecision influence the structural wind-induced vibration test results.In order to obtainthe rules,this paper analyzed the laws about the effects of turbulent parameters onsurface fluctuating wind load of square structure.The grille was used in wind tunnel toform same identical turbulence intensities but different integral scale wind fields,andsame identical integral scale but different turbulence intensity wind fields.Make theother turbulent parameters as a constant,studied the effects of a single parameter suchas turbulence intensity or integral scale on structural surface wind pressure distribution.The results show that the probability distribution curve of square structural base area isgood agreement with the Gauss distribution.With the increasing of the turbulenceintensity,the offset range of the distribution curve compared with the Gauss curve hasan increasing trend.The fluctuating wind pressure coefficient increases with theincreasing of turbulence intensity on the square structural surface,and the middle andupper area of windward surface are sensitive to the turbulence intensity.Turbulenceintegral scale has little effect on the fluctuating wind pressure coefficient,and the largerturbulence integral scale,the better horizontal correlation and vertical correlation.
引文
[1]Wang T,Han W,Yang F,et al.Wind-vehicle-bridge coupled vibration analysis based on random traffic flow simulation[J].Journal of Traffic and Transportation Engineering(English Edition),2014,1(4):293-308
[2]Stathopoulos T.Scale effects in wind tunnel testing of low buildings[J].Journal of Wind Engineering&Industrial Aerodynamics,1983,13:314-326
[3]Tieleman H W.Wind tunnel simulation of the turbulence in the surface layer[C].The Proceedings of the 6th U.S.National Conference on Wind Eng,University of Houston March 8-10,1989
[4]Bearman P W,Morel T.Effect of free stream turbulence on the flow around bluff bodies[J].Progress in Aerospace sciences,1983,V(20):97-123
[5]Vickery P J.A wind tunnel study on a model of the full scale experimental house at Aylesbury,England[D].London,Canada:Thesis,Faculty of Engineering Science,The University of Western Ontario,1981
[6]Melbourne W H.Turbulence effects on maximum surface pressures a mechanism and possibility of reduction[C].Proceedings of the 5th International Conference on Wind Engineering,Fort Collins Colorado,U S,July,1979
[7]Hunt A.Scale effects on wind Tunnel measurements of surface pressure on model buildings[C].Proceedings of Colloquium Designing with the Wind,Nantes,France,June,1981
[8]隋杰,孙树立,李燕,等.脉动风荷载对公路防眩板结构抗风性能的影响[J].应用基础与工程科学学报,2013,21(5):899-907Sui Jie,Sui Shuli,Li Yan,et al.Wind resistance performance of anti-glare panel under fluctuating wind loads[J].Journal of Basic Science and Engineering,2013,21(5):899-907
[9]卢占斌,魏庆鼎.网格紊流CAARC模型风洞实验[J].空气动力学学报,2001,19(3):16-23Lu Zhanbin,Wei Qingding.An experiment on a CAARC model in grille turbulent flow[J].ACTAAerodynamica Sinica,2001,19(3):16-23
[10]白桦.影响桥梁及建筑结构风洞试验结果若干因素研究[D].西安:长安大学,2012Bai Hua.Research on the effect of several factors on the wind tunnel test results of bridge and building structure[D].Xi’an:Chang’an University,2012
[11]李春光,张记,陈政清.紊流积分尺度对桥梁颤振导数影响的试验研究[J].公路交通科技,2016,33(11):69-75Li Chunguang,Zhang Ji,Chen Zhengqing.Experimental study on influence of turbulence integral scale on flutter derivatives of bridge[J].Journal of Highway and Transportation Research and Development,2016,33(11):69-75
[12]潘韬,赵林,曹曙阳,等.多风扇主动控制风洞类平板断面抖振力识别研究[J].振动与冲击,2010,29(6):178-183Pan Tao,Zhao Lin,Cao Shuyang,et al.Buffeting force analysis of thin plate section in multiple fans active control wind tunnel[J].Journal of Vibration and Shock,2010,29(6):178-183
[13]白瑜光,赵岩,孙东科,等.钝体结构倒U形梁气动特性试验和数值研究[J].应用基础与工程科学学报,2014,22(4):793-802Bai Yuguang,Zhao Yan,Sun Dongke,et al.Aerodynamic characteristic investigation of a blunt body structure named inverse-U shaped beam with wind tunnel tests and numerical simulations[J].Journal of Basic Science and Engineering,2014,22(4):793-802
[14]白桦,何晗欣,刘健新,等.格栅紊流风特性参数模拟规律[J].振动与冲击,2016,35(22):209-214Bai Hua,He Hanxin,Liu Jianxin,et al.Wind characteristic parameters in grille turbulent flow[J].Journal of Vibration and Shock,2016,35(22):209-214
[15]白桦,回城玉,刘健新.紊流风特性参数对矩形结构表面平均风荷载的影响[J].建筑科学与工程学报,2017,34(6):77-84Bai Hua,Hui Chengyu,Liu Jianxin.Effects of turbulence parameters on surface average wind load of rectangular structure[J].Journal of Architecture and Civil Engineering,2017,34(6):77-84
[2]Stathopoulos T.Scale effects in wind tunnel testing of low buildings[J].Journal of Wind Engineering&Industrial Aerodynamics,1983,13:314-326
[3]Tieleman H W.Wind tunnel simulation of the turbulence in the surface layer[C].The Proceedings of the 6th U.S.National Conference on Wind Eng,University of Houston March 8-10,1989
[4]Bearman P W,Morel T.Effect of free stream turbulence on the flow around bluff bodies[J].Progress in Aerospace sciences,1983,V(20):97-123
[5]Vickery P J.A wind tunnel study on a model of the full scale experimental house at Aylesbury,England[D].London,Canada:Thesis,Faculty of Engineering Science,The University of Western Ontario,1981
[6]Melbourne W H.Turbulence effects on maximum surface pressures a mechanism and possibility of reduction[C].Proceedings of the 5th International Conference on Wind Engineering,Fort Collins Colorado,U S,July,1979
[7]Hunt A.Scale effects on wind Tunnel measurements of surface pressure on model buildings[C].Proceedings of Colloquium Designing with the Wind,Nantes,France,June,1981
[8]隋杰,孙树立,李燕,等.脉动风荷载对公路防眩板结构抗风性能的影响[J].应用基础与工程科学学报,2013,21(5):899-907Sui Jie,Sui Shuli,Li Yan,et al.Wind resistance performance of anti-glare panel under fluctuating wind loads[J].Journal of Basic Science and Engineering,2013,21(5):899-907
[9]卢占斌,魏庆鼎.网格紊流CAARC模型风洞实验[J].空气动力学学报,2001,19(3):16-23Lu Zhanbin,Wei Qingding.An experiment on a CAARC model in grille turbulent flow[J].ACTAAerodynamica Sinica,2001,19(3):16-23
[10]白桦.影响桥梁及建筑结构风洞试验结果若干因素研究[D].西安:长安大学,2012Bai Hua.Research on the effect of several factors on the wind tunnel test results of bridge and building structure[D].Xi’an:Chang’an University,2012
[11]李春光,张记,陈政清.紊流积分尺度对桥梁颤振导数影响的试验研究[J].公路交通科技,2016,33(11):69-75Li Chunguang,Zhang Ji,Chen Zhengqing.Experimental study on influence of turbulence integral scale on flutter derivatives of bridge[J].Journal of Highway and Transportation Research and Development,2016,33(11):69-75
[12]潘韬,赵林,曹曙阳,等.多风扇主动控制风洞类平板断面抖振力识别研究[J].振动与冲击,2010,29(6):178-183Pan Tao,Zhao Lin,Cao Shuyang,et al.Buffeting force analysis of thin plate section in multiple fans active control wind tunnel[J].Journal of Vibration and Shock,2010,29(6):178-183
[13]白瑜光,赵岩,孙东科,等.钝体结构倒U形梁气动特性试验和数值研究[J].应用基础与工程科学学报,2014,22(4):793-802Bai Yuguang,Zhao Yan,Sun Dongke,et al.Aerodynamic characteristic investigation of a blunt body structure named inverse-U shaped beam with wind tunnel tests and numerical simulations[J].Journal of Basic Science and Engineering,2014,22(4):793-802
[14]白桦,何晗欣,刘健新,等.格栅紊流风特性参数模拟规律[J].振动与冲击,2016,35(22):209-214Bai Hua,He Hanxin,Liu Jianxin,et al.Wind characteristic parameters in grille turbulent flow[J].Journal of Vibration and Shock,2016,35(22):209-214
[15]白桦,回城玉,刘健新.紊流风特性参数对矩形结构表面平均风荷载的影响[J].建筑科学与工程学报,2017,34(6):77-84Bai Hua,Hui Chengyu,Liu Jianxin.Effects of turbulence parameters on surface average wind load of rectangular structure[J].Journal of Architecture and Civil Engineering,2017,34(6):77-84