超大跨度渡槽脉动风频率特性分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
贵州龙场渡槽是我国目前最大的拱跨渡槽,其脉动风频率特性分析对设计工作具有极其重要的指导作用。计算了龙场渡槽在有水、无水工况下的前20阶自振频率,分析了相应的振型;采用极值Ⅰ型概率分布函数,计算得到龙场渡槽所在地的50年一遇最大设计风速为17.6m/s;针对1986~2010年间的3次强风风速和50年一遇最大设计风速,计算了龙场渡槽所在地典型高程处的脉动风功率谱密度。研究表明:在同一高度,随着年平均最大风速的增加,功率谱密度最大值逐渐增大,其对应的频率也在增大;对于同一风速,随着高度的增加,功率谱密度的最大值逐渐增大,其对应的频率也在增大。通过比较龙场渡槽自振频率与脉动风功率谱密度显著值所对应的频率,认为龙场渡槽在上述风速下不会发生共振现象。
At present,Longchang aqueduct in Guizhou Province is the largest arch span aqueduct in China.The pulsating wind frequency characteristics analysis plays an important guiding role in design.The first twenty natural frequencies of the Longchang aqueduct were calculated in water and anhydrous conditions,and the corresponding vibration modes were analyzed.The maximum designed wind velocity for once in 50 years of Longchang aqueduct,which is obtained by using extreme value Ⅰ-type probability distribution function,is 17.6 m/s.For the 3 strong breeze velocities during 1986-2010 and the maximum designed wind velocity for once in 50 years,pulsating wind power spectrum density at typical elevation of Longchang aqueduct was calculated.By comparing natural frequency and the frequency corresponding to the significant value of pulsating wind power spectrum density,it is shown that the resonance phenomenon of the Longchang aqueduct will not occur at above wind velocities.
引文
[1]Matsumoto M,Shirato H,Yagi T,et al.Effects ofaerodynamic interferences between heaving and tor-sional vibration of bridge decks:the case of TacomaNarrows Bridge[J].Journal of Wind Engineering andIndustrial Aerodynamics,2003,(91):1547-1557.
    [2]Hu Sh W,You R.Dynamic analysis of tall-pier aque-duct using ODE solver[C]∥Proceeding of The ThirdInternational Joint Conference on Computational Sci-ences and Optimization.Washington DC:IEEE,2010.68-72.
    [3]胡少伟,游日.超大跨径变截面钢筋混凝土拱式渡槽抗震分析[J].水电能源科学,2012,(1):103-106.Hu Sh W,You R.Aseismic analysis of long span rein-forced concrete arched flume with variable cross section[J].Water Resources and Power,2012,(1):103-106.
    [4]游日,胡少伟.超大拱式变截面渡槽收缩徐变影响研究[J].水电能源科学,2012,(1):107-109.You R,Hu Sh W.Shrinkage and creep analysis oflong span arched flume with variable cross section[J].Water Resources and Power,2012,(1):107-109.
    [5]胡少伟,游日.南水北调大型渡槽结构抗震安全性研究[J].防灾减灾工程学报,2011,31(5):496-500.Hu Sh W,You R.Structural safety analysis of large-sized aqueduct for South-north water diversion project[J].Journal of Disaster Prevention and Mitigation En-gineering,2011,31(5):496-500.
    [6]胡少伟,游日,涂启华.南水北调工程渡槽结构复合弯扭相关性分析[J].灌溉排水学报,2009,28(3):61-65.Hu Sh W,You R,Tu Q H.Bending-torsion relativityanalysis of aqueducts in the South-to-North Water Di-version Project[J].Journal of Irrigation and Drainage,2009,28(3):61-65.
    [7]刘亮,张华.排架渡槽流固耦合风振动力响应分析[J].人民黄河,2011,33(5):94-96.Liu L,Zhang H.Fluid-solid coupling wind-induceddynamic response analysis of frame supported aqueduct[J].Yellow River,2011,33(5):94-96.
    [8]徐伟,王博.基于梁壳复合有限条法的矩形渡槽自振特性分析[J].武汉理工大学学报,2010,32(9):323-327.Xu W,Wang B.Free vibration analysis of rectangleaqueducts based on beam-shell compound finite stipmethod[J].Journal of Wuhan University of Technol-ogy,2010,32(9):323-327.
    [9]刘登科,武晓琰,袁吉娜.大型渡槽有限条法自振特性分析[J].河南水利与南水北调,2010,(10):72-74.Liu D K,Wu X Y,Yuan J N.Finite strip method inanalysis of natural vibration characteristics of large aq-ueduct[J].Henan Water Conservancy and South-to-North Water Transfer Project,2010,(10):72-74.
    [10]刘福义,吴红华,李正农.排架支承式渡槽自振频率的简化计算方法[J].地震工程与工程振动,2003,23(3):87-91.Liu F Y,Wu H H,Li Zh N.Simplified calculatingmethod for natural frequency of aqueduct structureswith framed bent support[J].Earthquake Engineeringand Engineering Vibration,2003,23(3):87-91.
    [11]李正农,吴红华,楼梦麟.排架支承式渡槽结构自振特性的分析[J].地震工程与工程振动,2003,23(4):69-72.Li Zh N,Wu H H,Lou M L.Natural vibration char-acter analysis of aqueduct structure with framed bentsupports[J].Earthquake Engineering and EngineeringVibration,2003,23(4):69-72.
    [12]李正农,孟吉复.多槽体渡槽的自振特性分析[J].武汉大学学报(工学版),2001,34(4):11-16.Li Zh N,Meng J F.Analysis of natural vibrationcharacteristics of multi-body aqueduct[J].Engineer-ing Journal of Wuhan University,2001,34(4):11-16.
    [13]徐建国,李育文,王红卫.一种简支渡槽结构自振特性研究的方法[J].郑州轻工业学院学报(自然科学版),2001,16(4):20-22.Xu J G,Li Y W,Wang H W.A method for resear-ching the self-vibratory specialties of simple-supportflume structure[J].Journal of Zhengzhou Institute ofLight Industry(Natural Science),2001,16(4):20-22.
    [14]周立运,李普安.二道河斜拉渡槽自振特性的模型试验[J].水利水电技术,1989,(7):44-48.Zhou L Y,Li P A.Self-vibration characteristic modeltest of Erdao River cable-stayed aqueduct[J].Waterresources and Hydropower Engineering,1989,(7):44-48.
    [15]苏志,范万新,黄颖,等.北部湾沿海最大风速分布特征及工程设计风速推算[J].台湾海峡,2010,29(2):167-172.Su Zh,Fan W X,Huang Y,et al.Distribution char-acteristics of maximum wind speed and wind speed cal-culations for engineering design purposes on the BeibuGulf coast[J].Journal of Oceanography in TaiwanStrait,2010,29(2):167-172.
    [16]邓国红,陈超超,欧健,等.桥梁检测车臂架结构风振响应分析[J].重庆理工大学学报(自然科学),2010,24(5):12-17.Deng G H,Chen Ch Ch,Ou J,et al.Wind induceddynamic response analysis of bridge inspect vehicle′sarm structure[J].Journal of Chongqing University ofTechnology(Natural Science),2010,24(5):12-17.
    [17]GB50009-2001,建筑结构荷载规范[S].
    [18]周云.结构风振控制的设计方法与应用[M].北京:科学出版社,2009.Zhou Y.The Structure Wind Vibration Control DesignMethod and Application[M].Beijing:Science Press,2009.
    [19]杨宏青,陈正洪,高雪飞.鄂东长江公路大桥设计风速推算研究[J].气象科学,2010,30(4):526-529.Yang H Q,Chen Zh H,Gao X F.Study on the esti-mation of designed wind speed for Yangtze River high-way bridge in the east Hubei[J].Scientia Meteorolog-ica Sinica,2010,30(4):526-529.
    [20]黄浩辉,宋丽莉,植石群,等.广东省风速极值Ⅰ型分布参数估计方法的比较[J].气象,2007,33(3):101-106.Huang H H,Song L L,Zhi Sh Q,et al.Comparisonof estimation of wind speed extreme-Ⅰdistributionpara-meters in Guangdong Province[J].Meteorologi-cal Monthly,2007,33(3):101-106.
    [21]刘峰,许德德,陈正洪.北盘江大桥设计风速及脉动风频率的确定[J].中国港湾建设,2002,(1):23-27.Liu F,Xu D D,Chen Zh H.Calculation of designedwind velocity and wind pulsating frequency for thegreat bridge over the Beipan River[J].China HarbourEngineering,2002,(1):23-27.
    [22]JTG/TD60-01-2004,公路桥梁抗风设计规范[S].

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心