1000MW带伞撑空冷支架结构动力特性试验研究与有限元分析
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摘要
结合模型试验及有限元分析,研究了带伞撑空冷支架结构的动力特性。首先选取原型结构的1/4,并按照1/8缩尺比制作试验模型,采用锤击法获得模型结构的动力特性参数;然后采用ABAQUS有限元软件建立了模型结构计算模型,结果表明计算值与实测结果吻合较好,说明有限元建模方法比较合理;接着,建立了原型结构的有限元模型,进行了动力特性计算,分析了引起结构扭转效应严重的原因,并提出了考虑扭转效应的设计建议;最后,结合模型拟动力试验研究,分析了结构基本周期与阻尼的变化规律。研究结果可为推广应用带伞撑的新型空冷支架结构体系提供基础研究资料。
This paper studies the dynamic characteristics of air-cooled condenser structure through model test and finite element analysis.Firstly,Selecting a 1 /4 substructure,a 1 /8 scale model was constructed,The natural vibration frequencies and mode shapes of experimental model were obtained with hammering method;Then,the finite element model of the experiment structure was built with ABAQUS soft ware,the results show that the calculated values agree with the experimental results,the method of finite element model is reasonable;And then,the finite element model of the prototype structure was built to calculate the dynamic character,analyze the causes of the torsional effect of the structure,and design proposal considering the torsional effect was given;Finally,the basic period and damping variation of the structure was analyzed through pseudo dynamic test of the model.The results of this paper can be used for application of new type air-cooled condenser structure with umbrella brace.
This paper studies the dynamic characteristics of air-cooled condenser structure through model test and finite element analysis.Firstly,Selecting a 1 /4 substructure,a 1 /8 scale model was constructed,The natural vibration frequencies and mode shapes of experimental model were obtained with hammering method;Then,the finite element model of the experiment structure was built with ABAQUS soft ware,the results show that the calculated values agree with the experimental results,the method of finite element model is reasonable;And then,the finite element model of the prototype structure was built to calculate the dynamic character,analyze the causes of the torsional effect of the structure,and design proposal considering the torsional effect was given;Finally,the basic period and damping variation of the structure was analyzed through pseudo dynamic test of the model.The results of this paper can be used for application of new type air-cooled condenser structure with umbrella brace.
引文
[1]朱丽华,白国良,李晓文,等.基于主子系统耦合效应的直接空冷结构体系抗震性能研究[J].土木工程学报,2009,42(2):58-64.ZHU Lihua,BAI Guoliang,LI Xiaowen,et al.Study on the seismic behavior of direct air cooled condenser support platform based on primary-secondary system coupling effect[J].China Civil Engineering Journal,2009,42(2):58-64.
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[6]康灵果.大型火力发电厂少墙型钢混凝土框架主厂房抗震性能试验与设计方法研究[D].西安:西安建筑科技大学,2010.KANG Lingguo.Study on seismic performance experiment and design method of the few walls and SRC frame main building in large thermal powerplant[D].Xi’an:Xi’an University of Architecture&Technology,2010.
[7]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001.YAO Qianfeng,CHEN Ping.Civil engineering structural experiment[M].Beijing:China Architecture&Building Press,2001.
[8]李红星.大型火力发电厂空冷凝汽器支架结构体系研究[D].西安:西安建筑科技大学,2006.LI Hongxing.Study on the support structure system for air cooled condenser of big power plant[D].Xi’an:Xi’an University ofArchitecture&Technology,2006.
[9]1000MW空冷机组支架结构设备系统振动台试验研究报告[R].西安:中国电力顾问集团西北电力设计院,2011.Study on shaking table experiments of 1000MW-air-cooled condenser structure and equtpment system[R].Xi'an:Northwest Electric Power DesignInsttfute of China Power Engineering Groap,2011.
[10]李宏男,孙立晔.地震面波产生的地震转动分量研究[J].地震工程与工程振动,2001,21(1):15-23.LI Hongnan,Sun liye.Ration components of earthquake ground motions derived from surface waves[J].Earthquake Engineering and EngineeringVibration,2001,21(1):15-23.
[11]刘林,白国良,薛海君,等.1000MW空冷竖向混合结构平扭耦联地震反应分析[J].工业建筑,2012,42(4):131-135.LIU Lin,BAI Guoliang,XUE Haijun,et al.Study on lateral-torsional coupled seismic response analysis of support structure system of air cooledcondenser in 1000 MW thermal power plant[J]Industrial Construction,2012,42(4):131-135.
[2]姚泽良.大容量火电机组直接空冷结构体系环境作用响应研究[D].西安:西安建筑科技大学,2009.YAO Zeliang.Study on Environmental Response for Direct Air Cooled Condenser Structure System in Large Thermal Power Plants[D].Xi’an:Xi’an University of Architecture&Technology,2009.
[3]代慧娟,刘林,赵立涛,等.新型空冷支架结构体系抗震性能的理论分析[J].世界地震工程,2012,28(3):108-114.Dai Huijuan,Liu Lin,Zhao Litao,et al.Theoretical Analysis of the Seismic Performance of the New-type Air-cooled Condenser Structure System[J].Word earthquake engineering 2012,28(3):108-114.
[4]赵春莲,焦江伟,李红星,等.高烈度区1000MW机组带支撑空冷支架结构体系研究[J].武汉大学学报(工学版),2010,43(S1):25～27.ZHAO Chunlian,JIAO Jiangwei,LI Hongxing,etc.Study on 1000MW air-cooled condenser structure system with bracing in high earthquake in-tensity regions[J].Journal of Wuhan University(Engineering Edition),2010,43(S1):25-27.
[5]赵春莲,李红星,冉颢,等.1000MW直接空冷机组支架结构体系研究[J].武汉大学学报(工学版),2007,40(S):180～184.ZHAO Chunlian,LI Hongxing,Ran Hao,et al.Study on 1000MW air-cooled condenser structure system[J].Journal of Wuhan University(En-gineering Edition),2007,40(S):180-184.
[6]康灵果.大型火力发电厂少墙型钢混凝土框架主厂房抗震性能试验与设计方法研究[D].西安:西安建筑科技大学,2010.KANG Lingguo.Study on seismic performance experiment and design method of the few walls and SRC frame main building in large thermal powerplant[D].Xi’an:Xi’an University of Architecture&Technology,2010.
[7]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001.YAO Qianfeng,CHEN Ping.Civil engineering structural experiment[M].Beijing:China Architecture&Building Press,2001.
[8]李红星.大型火力发电厂空冷凝汽器支架结构体系研究[D].西安:西安建筑科技大学,2006.LI Hongxing.Study on the support structure system for air cooled condenser of big power plant[D].Xi’an:Xi’an University ofArchitecture&Technology,2006.
[9]1000MW空冷机组支架结构设备系统振动台试验研究报告[R].西安:中国电力顾问集团西北电力设计院,2011.Study on shaking table experiments of 1000MW-air-cooled condenser structure and equtpment system[R].Xi'an:Northwest Electric Power DesignInsttfute of China Power Engineering Groap,2011.
[10]李宏男,孙立晔.地震面波产生的地震转动分量研究[J].地震工程与工程振动,2001,21(1):15-23.LI Hongnan,Sun liye.Ration components of earthquake ground motions derived from surface waves[J].Earthquake Engineering and EngineeringVibration,2001,21(1):15-23.
[11]刘林,白国良,薛海君,等.1000MW空冷竖向混合结构平扭耦联地震反应分析[J].工业建筑,2012,42(4):131-135.LIU Lin,BAI Guoliang,XUE Haijun,et al.Study on lateral-torsional coupled seismic response analysis of support structure system of air cooledcondenser in 1000 MW thermal power plant[J]Industrial Construction,2012,42(4):131-135.
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