基于MRFD的爆炸冲击隔震体系及其半主动控制
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摘要
为有效减少爆炸冲击荷载对防护工程内人员及设备等的伤害,利用磁流变液阻尼器(MRFD)能够提供连续可调库伦阻尼力的特点,建立了基于MRFD的爆炸冲击隔震体系。对该体系进行了几种基于瞬时最优主动控制算法的半主动控制数值仿真分析,结果表明:选用合适的半主动控制算法及恰当的控制参数,利用MRFD进行冲击隔震,能有效控制结构在爆炸冲击荷载作用下的加速度反应。
To effectively reduce the damage of personnel and equipment in civil defense engineering subjected to blast shock wave, a shock isolation system with magnetorheological fluid dampers (MRFD) is established. MRFD can provide continuous and regulable coulomb friction, which is much efficient to reduce the accelerate response of the structure. The numerical simulation is completed by using a few semi-active control algorithms based on the instantaneous optimal active control algorithm. The results prove that the right semi-active control algorithms with suitable parameters can efficiently mitigate the structural response of acceleration.
To effectively reduce the damage of personnel and equipment in civil defense engineering subjected to blast shock wave, a shock isolation system with magnetorheological fluid dampers (MRFD) is established. MRFD can provide continuous and regulable coulomb friction, which is much efficient to reduce the accelerate response of the structure. The numerical simulation is completed by using a few semi-active control algorithms based on the instantaneous optimal active control algorithm. The results prove that the right semi-active control algorithms with suitable parameters can efficiently mitigate the structural response of acceleration.
引文
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[2]董宏晓,李伯松,贺永胜.爆炸冲击震动与隔震技术进展[C]//中国土木工程学会防护工程分会第九次学术年会论文集.长春:总参工程兵科研三所,2004.1133―1136.Dong Hongxiao,Li Bosong,He Yongsheng.Vibration subjected to blast shock and development of isolation technologies[C]//Proceedings of the9th Academic Conference of Protection Engineering Branch of Civil Engineering Institute in China.Changchun:The Third Engineer Scientific Research Institute of the Headquarters of the General Staff,2004,1133―1136.(in Chinese)
[3]欧进萍.结构振动控制—主动、半主动和智能控制[M].北京:科学出版社,2003.Ou Jinping.Structural vibration control—active,semi-active and smart control[M].Beijing:Science Press,2003.(in Chinese)
[4]徐龙河,周云,李忠献.半主动磁流变阻尼控制方法的比较与分析[J].世界地震工程,2000,16(3):95―100.Xu Longhe,Zhou Yun,Li Zhongxian.Comparison and analysis of semi-active magnetorheological damping control method[J].World Information on Earthquake Engineering,2000,16(3):95―100.(in Chinese)
[5]Jansen L M,Dyke S J.Semiactive control strategies for MR dampers:Comparative study[J].ASCE Journal of Engineering Mechanics,2000,126(8):795―803.
[6]Dyke S J,Spencer B F,Sain M K,Carlson J D.Modeling and control of magnetorheological dampers for seismic response reduction[J].Smart Material Structure,1996,5(5):565―575.
[7]宁欣,阎石,王丰.磁流变阻尼器半主动控制算法的改进[J].沈阳建筑工程学院学报,2004,20(1):4―6.Ning Xin,Yan Shi,Wang Feng.Improvement of the present semi-active control algorithm using MR damper[J].Journal of Shenyang Arch.and Civ.Eng.Univ.,2004,20(1):4―6.(in Chinese)
[8]Griffin M J,Whitham E M.Discomfort produced by impulsive whole-body vibration[J].Acoustical Society of American,1980,68(5):1277―1284.
[9]严东晋,钱七虎,唐德高.爆炸冲击振动对人体健康影响的评价[J].土木工程学报,2000,33(1):100―106.Yan Dongjin,Qian Qihu,Tang Degao.Estimating the effect of blast shock vibration on health of human-body[J].China Civil Engineering Journal,2000,33(1):100―106.(in Chinese)
[10]Izzuddin B A,Fang Q.Rate-sensitive analysis of framed structures part I:Model formulation and verification[J].Structural Engineering and Mechanics,1997,5(3):221―237.
[11]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.Liu Jingbo,Du Xiuli.Structural dynamics[M].Beijing:Mechanism Industry Press,2005.(in Chinese)
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