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-  2017 

零风速下桥梁主梁断面的自由振动响应 Free vibration response of bridge deck section at zero wind speed

Keywords: 桥梁主梁断面,零风速,自由振动,数值模拟,计算流体力学

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Abstract:

基于ANSYS FLUENT12.0,采用任意拉格朗日-欧拉(ALE)方法和弱耦合方法搭建了求解气动弹性问题的数值计算模型,提出了零风速下桥梁断面气动力的理论表达式,模拟了薄平板断面和大贝尔特桥主梁断面在零风速下的自由振动响应.基于所提出的气动力模型识别出了相应的气动力系数,进而计算出模型的振动频率和阻尼比,并分析了气动力对零风速下桥梁断面的自由振动响应的影响.结果表明:零风速下模型在振动时,对周围空气的干扰作用最小的是侧弯,其次是扭转,最大的是竖弯.当模型在竖弯振动时,若忽略周围空气的气动干扰作用,将会带来较大的误差

References

[1]  张哲,许福友,应旭永.大连星海湾跨海大桥抗风性能研究[C]//中国土木工程学会桥梁及结构工程分会.第21届全国桥梁学术会议论文集.北京:人民交通出版社,2014:823-830.Zhang Zhe,Xu Fuyou,Ying Xuyong.Study on wind stability of Dalian Xinghai bay bridge[C]//Bridge and Structural Engineering Branch of China Civil Engineering Society.Prof.of 21th National Conference on Bridges.Beijing:China Communications Press,2014:823-830.
[2]  刘高,刘天成.分体式钝体双箱钢箱梁斜拉桥节段模型风洞试验研究[J].土木工程学报,2010,(S2):49-54.Liu Gao,Liu Tiancheng.Sectional model wind tunnel test of a cable-stayed bridge with separated bluff steel twin-box girder[J].China Civil Engineering Journal,2010,(s2):49-54.
[3]  Menter F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA Journal,1994,32(8):1598-1605.
[4]  Xu F Y,Ying Xuyong,Zhang Z.Three-degree-offreedom coupled numerical technique for extracting 18aerodynamic derivatives of bridge decks[J].Journal of Structural Engineering,2014,140(11):04014085.
[5]  应旭永.桥梁结构气动参数识别的数值模拟研究[D].大连:大连理工大学,2012.Ying Xuyong.Numerical simulation study on identification of aerodynamic parameters for bridge structures[D].Dalian:Dalian University of Technology,2012.
[6]  刘庆宽,盛永青,马文永,等.小宽高比钢桁架悬索桥颤振稳定气动措施的试验研究[J].实验流体力学,2012,26(3):26-31.Liu Qingkuan,Sheng Yongqing,Ma Wenyong,et al.Experimental study on aerodynamic measures for flutter stability of suspension bridge with small aspect ratio steel truss girder[J].Journal of Experiments in Fluid Mechanics,2012,26(3):26-31.
[7]  Jain A,Jones N P,Scanlan R H.Effect of modal damping on bridge aeroelasticity[J].Journal of Wind Engineering and Industrial Aerodynamics,1998,77&78:421-430.

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