输电塔体系风雨激励的动力分析模型
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摘要
考虑输电塔结构体型特征、平均风剖面变化、功率谱能量特性与相干性等影响因素,通过谐波叠加法,对输电塔结构进行了脉动风速模拟,并以Kaimal谱为谱模型生成脉动风,通过数值计算验证了脉动风模拟方法的有效性。结合脉动风速模拟提出一种雨激励的模拟方法,计算出在一定风速情况下雨的冲击力。建立了输电塔的精细化有限元分析模型,研究了在风单独作用与风雨共同作用下的输电塔体系的动力响应,探讨了雨荷载对输电塔体系动力响应的影响。研究结果表明,雨荷载激励对输电塔的影响不能忽略。
Considering various influences such as structural style,variation of mean velocity profile,characteristics of power spectral energy and cross-spectral coherence i.e.,based on the harmonic wave superimposing method,the time marching generating method of fluctuating wind has been developed. Based on Kaimal spectra,the time march of fluctuating wind is simulated. The validity of the method is demonstrated. Combined with the simulation of wind field,a simulating method of rain loading is presented. A rain-wind-induced dynamic model for transmission tower system is established. A precise finite element model of transmission tower is established. The results of rain-wind-induced dynamic response of transmission tower are compared with results of wind-induced response. It is shown that the effect of rain on the transmission towers may not be neglected.
Considering various influences such as structural style,variation of mean velocity profile,characteristics of power spectral energy and cross-spectral coherence i.e.,based on the harmonic wave superimposing method,the time marching generating method of fluctuating wind has been developed. Based on Kaimal spectra,the time march of fluctuating wind is simulated. The validity of the method is demonstrated. Combined with the simulation of wind field,a simulating method of rain loading is presented. A rain-wind-induced dynamic model for transmission tower system is established. A precise finite element model of transmission tower is established. The results of rain-wind-induced dynamic response of transmission tower are compared with results of wind-induced response. It is shown that the effect of rain on the transmission towers may not be neglected.
引文
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[2]王韶,周家启.双回平行输电线路可靠性模型[J].中国电机工程学报,2003,23(9):53-56.Wang Shao,Zhou Jiaqi.A reliability evaluation model for two transmission lines in parallel[J].Proceedings of the CSEE,2003,23(9):53-56(in Chinese).
[3]刘健,程红丽,毕鹏翔.配电网的简化模型[J].中国电机工程学报,2003,21(12):77-82.Liu Jian,Cheng Hongli,Bi Pengxiang.A simplified model for distribution system[J].Proceedings of the CSEE,2003,21(12):77-82(in Chinese).
[4]宋之平.从可持续发展的战略高度重新审视热电联产[J].中国电机工程学报,1998,18(4):225-230.Song Zhiping.Rediscovering the combined heat and power in terms of the sustainable development[J].Proceedings of the CSEE,1998,18(4):225-230(in Chinese).
[5]陈国庆,孙才新,张志劲,等.计及风速影响的500kV同杆双回线路绕击耐雷性能计算模型研究[J].中国电机工程学报,2003,23(5):108-112.Chen Guoqing,Sun Caixin,Zhang Zhijin,et al.Study on the calculation model of lightning protection performance of shielding failure for500kV double circuit transmission line[J].Proceedings of the CSEE,2003,23(5):108-112(in Chinese).
[6]汤振飞,唐国庆,于尔铿,等.电力市场输电定价[J].中国电机工程学报,2001,21(10):91-95.Tang Zhenfei,Tang Guoqing,Yu Erkeng,et al.Power market transmission pricing[J].Proceedings of the CSEE,2001,21(10):91-95(in Chinese).
[7]项立人.应该加快我国特高压输电前期工作研究[J].电网技术,1999,20(2):54-58.Xiang Liren.Speed up earlier UHV transmission research in China[J].Power System Technology,1999,20(2):54-58(in Chinese).
[8]李宏男,陆鸣,王前信.大跨越自立式高压输电塔电缆体系的简化抗震计算[J].地震工程与工程震动,1990,10(2):73-87.Li Hongnan,Lu Ming,Wang Qianxin.Simplified aseismic calculation of high voltage system consisting of long span transmission lines and their supporting towers[J].Earthquake Engineering and Engineering Vibration,1990,10(2):73-87(in Chinese).
[9]李宏男,王前信.大跨越输电塔体系的动力特性[J].土木工程学报,1997,30(5):28-36.Li Hongnan,Wang Qianxin.Dynamic characteristics of long-span transmission lines and their supporting towers[J].China Civil Engineering Journal,1997,30(5):28-36(in Chinese).
[10]李宏男,石文龙,贾连光.导线对输电塔体系纵向振动的影响界限及简化抗震计算方法[J].振动与冲击,2004,23(2):1-8.Li Hongnan,Shi Wenlong,Jia Lianguang.Limitations of effects of lines on in-plane vibrations of transmission towers and simplified seismic calculation method[J].Journal of Vibration and Shock,2004,23(2):1-8(in Chinese).
[11]岳茂光,王东升,李宏男,等.近断层地震动作用下输电塔-导线体系反应分析[J].地震工程与工程振动,2005,25(4):116-125.Yue Maoguang,Wang Dongsheng,Li Hongnan,et al.Response of power transmission tower-cable system subjected to near-fault ground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(4):116-125(in Chinese).
[12]石文龙,李宏男,贾连光.输电塔-导线耦联体系模型的振动台试验研究[J].工程力学,2006,23(5):89-93.Shi Wenlong,Li Hongnan,Jia Lianguang.Shaking table test of coupled system of transmission lines and towers[J].Engineering Mechanics,2006,23(5):89-93(in Chinese).
[13]Ronaldo C B,Rosangela S R,Michele S P.et al.Dynamic behavior and stability of transmission line towers under wind forces[J].J.Wind Eng.Ind.Aerodyn,2003,91(8):1051-1067.
[14]Kikuchi N,Matsuzaki Y,Yukino T,et al.Aerodynamic drag of new-design electric power wire in a heavy rainfall and wind[J].J.Wind Eng.Ind.Aerodyn,2003,91(1):41-51.
[15]Li Hongnan,Bai Haifeng.High-voltage transmission tower-line system subjected to disaster loads[J].Progress In Natural Science,2006,16(9):899-911.
[16]Simiu E,Scanlan R H.Wind effects on structures[M].New York:John Wiley and Sons,1996.
[17]Shinozuka M,Jan C M.Digital simulation of random processes and its applications[J].Sound Vib,1972,25(1):111-128.
[18]王之宏.风荷载的模拟研究[J].建筑结构学报,1994,15(1):44-52.Wang Zhihong.Simulation of Wind Loading[J].Journal of building structures,1994,15(1):44-52(in Chinese).
[19]盛裴轩,毛节泰,李建国,等.大气物理学[M].北京:北京大学出版社,2003.
[20]贡力.黄土高原降雨雨滴动能的侵蚀计算[J].兰州交通大学学报(自然科学版),2005,24(4):43-45.Gong Li.Erosion calculation of raindrops'kinetic energy of loess plateau's rainfall[J].Journal of Lanzhou Jiaotong University(Natural Sciences),2005,24(4):43-45(in Chinese).
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