南宁五象东盟塔风振响应大涡模拟研究
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摘要
以建筑总高度为528 m高的南宁五象东盟塔为工程案例,采用一种新的湍流入口生成方法——窄带叠加法(NSRFG)对其进行了风振响应大涡模拟(LES)研究,计算了该结构的基底荷载和位移响应,并把数值风洞模拟结果与高频天平测力(HFFB)风洞试验结果进行详细对比。结果表明,顺风向和横方向基底弯矩功率谱数值模拟结果与风洞试验基本一致,扭转方向模拟结果有一定差距。在风振响应方面,数值模拟顺风向风振响应计算结果与风洞试验结果吻合较好,横风向响应和扭转方向计算结果稍偏小。另外在横风向上,该研究的数值模拟方法较好地预测了与试验结果相近的建筑模型漩涡脱落频率,能为结构设计提供有价值的参考。
Here,528 m high Nanning Wuxiang ASEAN Tower was taken as an engineering example,a new turbulent inflow generator named the narrowband synthetic random flow generator( NSRFG) was used to do the large eddy simulation( LES) for its wind-induced vibration response. Its base loads and displacement responses were calculated. The numerical wind tunnel's simulation results were compared with those of the HFFB wind tunnel tests,and the effectiveness and correctness of NSRFG were verified. The results showed that the base bending moment power spectra simulation results in downwind and crosswind directions agree well with those of the wind tunnel tests,but the simulation results in torsional direction have a certain gap compared with the wind tunnel test ones; for the tower's wind-induced vibration responses,the numerical simulation results in downwind direction agree well with the wind tunnel test ones,but the simulation results in crosswind and torsional directions are a little smaller; in across-wind direction,the predicted value for the vortex shedding frequency of the tower model with NSRFG was close to the wind tunnel test one. The study results provided a valuable reference for structural design.
Here,528 m high Nanning Wuxiang ASEAN Tower was taken as an engineering example,a new turbulent inflow generator named the narrowband synthetic random flow generator( NSRFG) was used to do the large eddy simulation( LES) for its wind-induced vibration response. Its base loads and displacement responses were calculated. The numerical wind tunnel's simulation results were compared with those of the HFFB wind tunnel tests,and the effectiveness and correctness of NSRFG were verified. The results showed that the base bending moment power spectra simulation results in downwind and crosswind directions agree well with those of the wind tunnel tests,but the simulation results in torsional direction have a certain gap compared with the wind tunnel test ones; for the tower's wind-induced vibration responses,the numerical simulation results in downwind direction agree well with the wind tunnel test ones,but the simulation results in crosswind and torsional directions are a little smaller; in across-wind direction,the predicted value for the vortex shedding frequency of the tower model with NSRFG was close to the wind tunnel test one. The study results provided a valuable reference for structural design.
引文
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[12]CASTRO H G,PAZ R R. A time and space correlated turbulence synthesis method for Large Eddy Simulatins[J].Journal of Wind Engineering and Industrial Aerodynamics,2013,235(4):742-763.
[13]郑德乾,顾明,张爱社.基于POD的大涡模拟入流脉动合成方法研究[J].振动与冲击,2014,33(6):90-96.ZHENG Deqian,GU Ming,ZHANG Aishe. POD based inflow turbulence generation method for large eddy simulation[J]. Journal of Vibration and Shock,2014,33(6):90-96.
[14]Engineering Sciences Data Unit(ESDU). Characteristics of atmospheric turbulence near the ground. Part II:single point data for strong winds:85020[R].(2001-08-01).
[15]HEMON P,SANTI F. Simulation of a spatially correlated turbulent velocity field using biorthogonal decomposition[J].Journal of Wind Engineering and Industrial Aerodynamics,2007,95(1):21-29.
[16](日)风洞实验指南研究委员会.建筑风洞试验指南[M].孙瑛,武岳,曹正罡,译.北京:中国建筑工业出版社,2011.
[2]李秋胜,刘顺.基于大涡模拟的平屋盖锥形涡数值模拟研究[J].湖南大学学报(自然科学版),2015,42(11):72-79.LI Qiusheng, LIU Shun. Large eddy simulation of the characteristics of conical vortex on a flat roof[J]. Journal of Hunan University(Natural Sciences), 2015, 42(11):72-79.
[3]卢春玲,李秋胜,黄生洪,等.深圳平安国际金融大厦风致响应大涡模拟分析[J].建筑结构学报,2012,33(11):1-11.LU Chunling,LI Qiusheng,HUANG Shenghong,et al. Large eddy simulation of wind induced response on the Shenzhen Pingan IFC Building[J]. Journal of Building Structures,2012,33(11):1-11.
[4]建筑结构荷载规范:GB 50009—2012[S].北京:中国建筑工业出版社,2012.
[5]YU Yuanlin,YANG Yi,XIE Zhuangning. A new inflow turbulence generator for large eddy simulation evaluation of wind effects on a standard high-rise building[J]. Building and Environment,2018,138:300-313.
[6]TOMINAGA Y, MOCHIDA A, YOSHIE R, et al. AIJ guidelines for practical applications of CFD to pedestrian wind environment around buildings[J]. Journal of Wind Engineering and Industrial Aerodynamics,2008,96(10):1749-1761.
[7]MARUYAMA T,MORIKAWA H. Numerical simulation of wind fluctuation conditioned by experimental data in turbulent boundary layer[C]∥In:Proceedings of the 13th Symposium on Wind Engineering. Tokyo:Japan Association for Wind Engineering,1994.
[8]KONDO K,MURAKAMI S,MOCHIDA A. Generation of velocity fluctuations for inflow boundary condition of LES[J].Journal of Wind Engineering and Industrial Aerodynamics,1997,67/68(97):51-64.
[9]ABOSHOSHA H,ELSHAER A,GIRMA T,et al. Consistent inflow turbulence generator for LES evaluation of windinduced responses for tall buildings[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2015, 142:198-216.
[10]SMIRNOV R,SHI S,CELIK I. Random flow generation technique for large eddy simulations and particle-dynamics modeling[J]. Journal of Fluids Engineering,2001,123(2):359-371.
[11]HUANG S H,LI Q S,WU J R. A general inflow turbulence generator for large eddy simulation[J]. Journal of Wind Engineering and Industrial Aerodynamics,2010,98(10):600-617.
[12]CASTRO H G,PAZ R R. A time and space correlated turbulence synthesis method for Large Eddy Simulatins[J].Journal of Wind Engineering and Industrial Aerodynamics,2013,235(4):742-763.
[13]郑德乾,顾明,张爱社.基于POD的大涡模拟入流脉动合成方法研究[J].振动与冲击,2014,33(6):90-96.ZHENG Deqian,GU Ming,ZHANG Aishe. POD based inflow turbulence generation method for large eddy simulation[J]. Journal of Vibration and Shock,2014,33(6):90-96.
[14]Engineering Sciences Data Unit(ESDU). Characteristics of atmospheric turbulence near the ground. Part II:single point data for strong winds:85020[R].(2001-08-01).
[15]HEMON P,SANTI F. Simulation of a spatially correlated turbulent velocity field using biorthogonal decomposition[J].Journal of Wind Engineering and Industrial Aerodynamics,2007,95(1):21-29.
[16](日)风洞实验指南研究委员会.建筑风洞试验指南[M].孙瑛,武岳,曹正罡,译.北京:中国建筑工业出版社,2011.