空冷桥架风机随机扰力模型
|
摘要
分析不同转速下直接空冷风机桥架振动实测速度响应表明,传统简谐扰力作用的振动响应不能反映实测振幅、相位缓慢变化的窄带随机特性;采用载波理论建立的风机扰力模型可有效反映桥架振动的随机性。结合风机桥架振动时、频域分析结果,以速度响应功率谱为目标识别扰力模型参数。模拟结果表明,扰力模型标准差随风机转速增加而增大。
The vibration response to traditional harmonic exciting force can't be used to the narrowband random characteristics of the measured vibration velocities of direct air cooling fan bridges. Consequently,a random exciting force model based on the carrier wave theory was proposed to reflect effectively the random features of the bridge's vibration.Combined with the analysis results time domain and frequency one,the exciting force model's parameters were identified with the power spectra of the velocity responses the targets. The results showed that the standard deviation of the random exciting force model increases with increase in rotating speed of fans.
The vibration response to traditional harmonic exciting force can't be used to the narrowband random characteristics of the measured vibration velocities of direct air cooling fan bridges. Consequently,a random exciting force model based on the carrier wave theory was proposed to reflect effectively the random features of the bridge's vibration.Combined with the analysis results time domain and frequency one,the exciting force model's parameters were identified with the power spectra of the velocity responses the targets. The results showed that the standard deviation of the random exciting force model increases with increase in rotating speed of fans.
引文
[1]戴振会,孙奉仲,王宏国.国内外直接空冷系统的发展现状[J].电站系统工程,2009,25(3):1-4.DAI Zhen-hui,SUN Feng-zhong,WANG Hong-guo.Presentstatus and development of direct air-cooling unit in the world[J].Power System Engineering,2009,25(3):1-4.
[2]徐亚洲,刘林,白国良.大型直接空冷系统风机桥架振动分析[J].中国电机工程学报,2011,31(S):161-164.XU Ya-zhou,LIU Lin,BAI Guo-liang.Vibration analysis of fan bridge in direct air cooled condenser system subjected to running large draught fans[J].Proceedings of the CSEE,2011,31(S):161-164.
[3]白国良,朱丽华,赵春莲,等.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42-49.BAI Guo-liang,ZHU Li-hua,ZHAO Chun-lian,et al.Modeltest on behavior of direct air cooled condenser support platform under service load and earthquake action[J].Journalof Building Structures,2008,29(5):42-49.
[4]屈铁军,王献云,窦瑞杰,等.直接空冷系统风机运行扰力试验研究[J].土木工程学报,2011,44(S):71-80.QU Tie-jun,WANG Xian-yun,DOU Rui-jie,et al.Experimental research of oscillation forces of fans in operationof direct air cooling system[J].Journal for Civil Engineering,2011,44(S):71-80.
[5]李红星,赵春莲,试小虎.空冷风机桥架谐响应计算分析[J].武汉大学学报,2008,41(S):104-107.LI Hong-xing,ZHAO Chun-lian,SHI Xiao-hu.Analysis of harmonic response of fan bridgetruss in ACC structure system[J].Engineering Journal of Wuhan University,2008,41(S):104-107.
[6]李国强,陈素文,李杰,等.上海金茂大厦动力特性测试[J].土木工程学报,2003,3(2):35-39.LI Guo-qiang,CHEN Su-wen,LI Jie,et al.Measurements of dynamic properties of Shanghai Jinmaomasion[J].Journal for Civil Engineering,2003,3(2):35-39.
[7]Wilson E L.Static and dynamic analysis of structures,Forth edition(revised)[M].Computers and Structures,Inc,2003.
[8]胡异丁,任伟新,杨栋,等.基于希尔伯特变换的非平稳调幅信号解调[J].振动与冲击,2013,32(10):181-183.HU Yi-ding,REN Wei-xin,YANG Dong,et al.Demodulation of non-stationary amplitude modulated signal based on Hilbert transform[J].Journalof Vibration and Shock,2013,32(10):181-183.
[9]罗鹏飞,张文明.随机信号分析与处理[M].北京:清华大学出版社,2010.
[10]张德丰.matlab数字信号处理与应用[M].北京:清华大学出版社,2010.
[11]余岭,陈鸿天,罗绍湘.用时域法和频时域法识别桥面移动车载[J].工程力学,2001,18(5):100-107.YU Ling,CHEN Hong-tian,LUO Shao-xiang.Identification of moving vehicle loads on bridges using time domain and frequency-time domain method[J].Engineering Mechanics,2001,18(5):100-107.
[12]任忠运,薛飞.空冷风机桥谐响应动力设计与分析[J].武汉大学学报,2010,41(S):77-80.REN Zhong-yun,XUE Fei.Dynamic analysis of fan bridge truss and structural design[J].Engineering Journal of Wuhan University,2010,41(S):77-80.
[13]王忠友,杨志刚.电站直接空冷系统大直径风机振动分析[J].应用能源技术,2007(1):31-34.WANG Zhong-you,YANG Zhi-gang.Vibration analysis of the full diameter fan for the direct air cooling system of power station[J].Applied Energy Technology,2007(1):31-34.
[14]刘林,白国良,曾金盛,等.直接空冷电厂低频运转大直径风机系统研究[J].钢结构,2012,27(5):21-25.LIU Lin,BAI Guo-liang,ZENG Jin-sheng,et al.Vibration study on the big diameter and low-frequency operation axial flow fan system in direct air cooled technique thermo power plant[J].Steel Construction,2012,27(5):21-25.
[2]徐亚洲,刘林,白国良.大型直接空冷系统风机桥架振动分析[J].中国电机工程学报,2011,31(S):161-164.XU Ya-zhou,LIU Lin,BAI Guo-liang.Vibration analysis of fan bridge in direct air cooled condenser system subjected to running large draught fans[J].Proceedings of the CSEE,2011,31(S):161-164.
[3]白国良,朱丽华,赵春莲,等.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42-49.BAI Guo-liang,ZHU Li-hua,ZHAO Chun-lian,et al.Modeltest on behavior of direct air cooled condenser support platform under service load and earthquake action[J].Journalof Building Structures,2008,29(5):42-49.
[4]屈铁军,王献云,窦瑞杰,等.直接空冷系统风机运行扰力试验研究[J].土木工程学报,2011,44(S):71-80.QU Tie-jun,WANG Xian-yun,DOU Rui-jie,et al.Experimental research of oscillation forces of fans in operationof direct air cooling system[J].Journal for Civil Engineering,2011,44(S):71-80.
[5]李红星,赵春莲,试小虎.空冷风机桥架谐响应计算分析[J].武汉大学学报,2008,41(S):104-107.LI Hong-xing,ZHAO Chun-lian,SHI Xiao-hu.Analysis of harmonic response of fan bridgetruss in ACC structure system[J].Engineering Journal of Wuhan University,2008,41(S):104-107.
[6]李国强,陈素文,李杰,等.上海金茂大厦动力特性测试[J].土木工程学报,2003,3(2):35-39.LI Guo-qiang,CHEN Su-wen,LI Jie,et al.Measurements of dynamic properties of Shanghai Jinmaomasion[J].Journal for Civil Engineering,2003,3(2):35-39.
[7]Wilson E L.Static and dynamic analysis of structures,Forth edition(revised)[M].Computers and Structures,Inc,2003.
[8]胡异丁,任伟新,杨栋,等.基于希尔伯特变换的非平稳调幅信号解调[J].振动与冲击,2013,32(10):181-183.HU Yi-ding,REN Wei-xin,YANG Dong,et al.Demodulation of non-stationary amplitude modulated signal based on Hilbert transform[J].Journalof Vibration and Shock,2013,32(10):181-183.
[9]罗鹏飞,张文明.随机信号分析与处理[M].北京:清华大学出版社,2010.
[10]张德丰.matlab数字信号处理与应用[M].北京:清华大学出版社,2010.
[11]余岭,陈鸿天,罗绍湘.用时域法和频时域法识别桥面移动车载[J].工程力学,2001,18(5):100-107.YU Ling,CHEN Hong-tian,LUO Shao-xiang.Identification of moving vehicle loads on bridges using time domain and frequency-time domain method[J].Engineering Mechanics,2001,18(5):100-107.
[12]任忠运,薛飞.空冷风机桥谐响应动力设计与分析[J].武汉大学学报,2010,41(S):77-80.REN Zhong-yun,XUE Fei.Dynamic analysis of fan bridge truss and structural design[J].Engineering Journal of Wuhan University,2010,41(S):77-80.
[13]王忠友,杨志刚.电站直接空冷系统大直径风机振动分析[J].应用能源技术,2007(1):31-34.WANG Zhong-you,YANG Zhi-gang.Vibration analysis of the full diameter fan for the direct air cooling system of power station[J].Applied Energy Technology,2007(1):31-34.
[14]刘林,白国良,曾金盛,等.直接空冷电厂低频运转大直径风机系统研究[J].钢结构,2012,27(5):21-25.LIU Lin,BAI Guo-liang,ZENG Jin-sheng,et al.Vibration study on the big diameter and low-frequency operation axial flow fan system in direct air cooled technique thermo power plant[J].Steel Construction,2012,27(5):21-25.
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