基于SIMULINK的基础滚动隔震输电塔地震仿真分析
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摘要
提出一种新的基于弹簧-偏心轴承的滚动隔震支座,并将此隔震支座应用于一输电铁塔结构地震响应分析中。考虑输电塔为弯剪型多自由度体系模型,建立了输电塔基础滚动隔震体系运动方程。将隔震体系运动方程化为状态方程,在SIMULINK环境下进行仿真分析。研究结果表明,该隔震系统可有效地消减地震能量向上部结构的传递;隔震支座的弹簧可有效地限制滚动板的位移,保证滚动隔震支座的自动复位能力;嵌于滚动板之上的正交轴承系统很好地解决了滚球定位及同步运动问题。
A new rolling isolator based on spring-eccentric bearing was proposed,which was applied to the seismic response analysis of a transmission tower structure.The dynamic equation of the rolling isolation system was established,assuming that the transmission tower be a flexure-shear type MDF system.The dynamic equation of the rolling isolation system was changed into a state equation and was analyzed in SIMULINK environment.The results had shown that the isolation system reduced transfer of earthquake energy;the spring of the isolator restrained effectively the displacement of the motherboard,thus improving the restoring capacity of transmission tower;the orthogonal bearing system embedded on roll board can keep the rolling balls in its position and in same step movement.
A new rolling isolator based on spring-eccentric bearing was proposed,which was applied to the seismic response analysis of a transmission tower structure.The dynamic equation of the rolling isolation system was established,assuming that the transmission tower be a flexure-shear type MDF system.The dynamic equation of the rolling isolation system was changed into a state equation and was analyzed in SIMULINK environment.The results had shown that the isolation system reduced transfer of earthquake energy;the spring of the isolator restrained effectively the displacement of the motherboard,thus improving the restoring capacity of transmission tower;the orthogonal bearing system embedded on roll board can keep the rolling balls in its position and in same step movement.
引文
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[2]史红福,樊剑,李黎.滚动基础隔震机构的动力分析[J].振动与冲击,2005,24(6):91-94(Shi Hongfu,FanJian,Li Li.Dynamic analysis of structure isolated byrolling base[J].Journal of Vibration and Shock,2005,24(6):91-94(in Chinese))
[3]毛利军,李爱群.基于SIMULINK的基础滑移隔震结构仿真计算分析[J].东南大学学报:自然科学版,2002,32(5):804-808(Mao Lijun,Li Aiqun.Seismic simulationof a sliding structure based on SIMULINK[J].Journal ofSoutheast University:Natural Science Edition,2002,32(5):804-808(in Chinese))
[4]吴二军,郭彤,李爱群.滚轴滚动摩擦系数研究与建筑物迁移工程水平动力计算[J].土木工程学报,2006,39(6):57-60(Wu Erjun,Guo Tong,Li Aiqun.A study onthe rolling friction coefficient and the horizontal driving-force calculation in building monolithic moving engineering[J].China Civil Engineering Journal,2006,39(6):57-60(in Chinese))
[5]洛阳轴承研究所.滚动轴承产品样本[M].北京:中国石化出版社,2000
[6]邱杰,原渭兰.数字计算机仿真中消除代数环问题的研究[J].计算机仿真,2003,20(7):33-35(Qiu Jie,YuanWeilan.Research on removing algebraic loop in digitalcomputer simulation[J].Computer Simulation,2003,20(7):33-35(in Chinese))
[7]王肇明,马人乐.塔式结构[M].北京:科学出版社,2004
[8]刘德馨,刘广均.隔震房屋结构沿高度的地震剪力分布及其简化计算[J].四川建筑科学研究,1992,(4):38-50
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