超大型冷却塔风荷载和风振响应参数分析:自激力效应
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摘要
以内陆在建打破世界纪录的某核电超大型冷却塔(高度为215m)为例,基于改进的等效梁格设计方法,在国内外首次实现了同步测压和测振的冷却塔气弹模型风洞试验,采用作者已提出的大型冷却塔风振计算方法并加载试验获得的两种气动力参数进行风振响应分析,探讨自激力效应对于大型冷却塔表面风压和风振响应的影响。分析表明:自激力对于大型冷却塔表面平均风压的分布特性影响较小、但对脉动风压的分布形式和数值影响较大;自激力对于结构大部分区域风振响应影响的误差都在5%以内,最大值达到10%,定性影响有利有弊。
Taking the super large cooling tower with world record as the example,based on modified equivalent beam-net design method,wind tunnel test of simultaneous pressure and vibration measurement for large cooling towers was carried out.By the numerical algorithm proposed by the author,the wind-induced response analysis was conducted,using the two aero-dynamic parameters obtained from experiments.The effects of self-excited force on the surface pressures and wind induced responses were discussed.The results show that: the self-excited force has little influence on the average surface pressure distribution characteristics,while it has greater influence on fluctuant wind pressures;the response errors of most structures under self-excited forces are between 5% and 10% and the impact is advantageous or disadvantageous even the maximum value is 10%.
Taking the super large cooling tower with world record as the example,based on modified equivalent beam-net design method,wind tunnel test of simultaneous pressure and vibration measurement for large cooling towers was carried out.By the numerical algorithm proposed by the author,the wind-induced response analysis was conducted,using the two aero-dynamic parameters obtained from experiments.The effects of self-excited force on the surface pressures and wind induced responses were discussed.The results show that: the self-excited force has little influence on the average surface pressure distribution characteristics,while it has greater influence on fluctuant wind pressures;the response errors of most structures under self-excited forces are between 5% and 10% and the impact is advantageous or disadvantageous even the maximum value is 10%.
引文
[1]张彬乾,李建英,阎文成.超大型双曲冷却塔双塔干扰的风荷载特性研究[J].流体力学实验与测量,2003,17(增):93-97(Zhang Binqian,Li Jianying,Yan Wencheng.Investigation on interrelation of wind load for double superlarge hyperbolic cooling tower[J].Experiments andMeasurements in Fluid Mechanics,2003,17(S):93-97(inChinese))
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[9]鲍侃袁.大型双曲冷却塔的风荷载和风致响应理论分析与试验研究[D].浙江:浙江大学,2009(BaoKanyuan.Theoretical and experimental research on windload and wind induced response of large hyperbolic coolingtowers[D].Zhejiang:Zhejiang University,2009(inChinese))
[10]柯世堂,葛耀君,赵林,等.大型冷却塔结构的等效静力风荷载[J].同济大学学报:自然科学版,2011,39(8):1132-1137(Ke Shitang,Ge Yaojun,Zhao Lin,et al.Equivalent static wind load of large cooling tower[J].Journal of Tongji University:Natural Science Edition,2011,39(8):1132-1137(in Chinese))
[11]柯世堂,葛耀君.基于一致耦合法的大型博物馆结构风致响应精细化研究[J].建筑结构学报,2012,33(2):23-29(Ke Shitang,Ge Yaojun.Refined research on wind-induced response of roof structure of a large museum basedon consistent coupled method[J].Journal of BuildingStructures,2012,32(2):23-29(in Chinese))
[12]柯世堂,赵林,葛耀君,等.大型双曲冷却塔气弹模型风洞试验和响应特性[J].建筑结构学报,2010,31(2):61-68(Ke Shitang,Zhao Lin,Ge Yaojun.Wind tunnel teston aeroelastic model of large hyperbolic cooling towers andfeatures of wind-induced response[J].Journal of BuildingStructures,2010,31(2):61-68(in Chinese))
[2]柯世堂,赵林,葛耀君.超大型冷却塔结构风振与地震作用影响比较[J].哈尔滨工业大学学报,2010,42(10):1635-1641(Ke Shitang,Zhao Lin,Ge Yaojun.Comparison of super-large cooling towers under earthquakeexcitation and wind load[J].Journal of Harbin Institute ofTechnology,2010,42(10):1635-1641(in Chinese))
[3]赵林,李鹏飞,葛耀君.等效静风荷载下超大型冷却塔受力性能分析[J].工程力学,2008,25(7):79-86(ZhaoLin,Li Pengfei,Ge Yaojun.Numerical investigation onperformance of super large cooling towers under equivalentstatic wind load[J].Engineering Mechanics,2008,25(7):79-86(in Chinese))
[4]Chen Kai,Wei Qingding.Investigation of wind-inducedvibration of cooling towers[C]//Proceedings of the 11thStructural Wind Engineering Conference,2003:177-182
[5]柯世堂,葛耀君,赵林.大型双曲冷却塔表面脉动风压随机特性——非高斯特性研究[J].实验流体力学,2010,24(3):12-18(Ke Shitang,Ge Yaojun,Zhao Lin.Research on features of fluctuating wind pressure on largehyperbolic cooling tower:features of non-Gaussian[J].Journal of Experiments in Fluid Mechanics,2010,24(3):12-18(in Chinese))
[6]Niemann H J,Kpper H D.Influence of adjacent buildingson wind effects on cooling towers[J].EngineeringStructures,1998,20(10):874-880
[7]Sun T F,Gu Z F,Zhou L M,et al.Full-scale measurementand wind-tunnel testing of wind loading on two neighboringcooling towers[J].Journal of Wind Engineering and IndustrialAerodynamics,1992,43(1/2/3):2213-2224
[8]刘若斐,沈国辉,孙炳楠.大型冷却塔风荷载的数值模拟研究[J].工程力学,2006,23(增1):177-183(LiuRuofei,Shen Guohui,Sun Bingnan.Numerical simulationstudy of wind load on large hyperbolic cooling tower[J].Engineering Mechanics,2006,23(S1):177-183(inChinese))
[9]鲍侃袁.大型双曲冷却塔的风荷载和风致响应理论分析与试验研究[D].浙江:浙江大学,2009(BaoKanyuan.Theoretical and experimental research on windload and wind induced response of large hyperbolic coolingtowers[D].Zhejiang:Zhejiang University,2009(inChinese))
[10]柯世堂,葛耀君,赵林,等.大型冷却塔结构的等效静力风荷载[J].同济大学学报:自然科学版,2011,39(8):1132-1137(Ke Shitang,Ge Yaojun,Zhao Lin,et al.Equivalent static wind load of large cooling tower[J].Journal of Tongji University:Natural Science Edition,2011,39(8):1132-1137(in Chinese))
[11]柯世堂,葛耀君.基于一致耦合法的大型博物馆结构风致响应精细化研究[J].建筑结构学报,2012,33(2):23-29(Ke Shitang,Ge Yaojun.Refined research on wind-induced response of roof structure of a large museum basedon consistent coupled method[J].Journal of BuildingStructures,2012,32(2):23-29(in Chinese))
[12]柯世堂,赵林,葛耀君,等.大型双曲冷却塔气弹模型风洞试验和响应特性[J].建筑结构学报,2010,31(2):61-68(Ke Shitang,Zhao Lin,Ge Yaojun.Wind tunnel teston aeroelastic model of large hyperbolic cooling towers andfeatures of wind-induced response[J].Journal of BuildingStructures,2010,31(2):61-68(in Chinese))
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