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南京长江二桥南汊桥地震反应的主动控制及AMD系统参数设计 预览 被引量:4

ACTIVE CONTROL OF SEISMIC RESPONSE AND DESIGN OF AMD SYSTEM PARAMETERS FOR THE SECOND NANJING YANGTZE-RIVER BRIDGE
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摘要 基于模态空间法对结构运动方程进行降阶,运用经典最优控制理论,提出了采用主动质量阻尼系统AMD对大跨度斜拉桥地震反应进行主动控制的方法.以南京长江二桥南汊桥为例,对其在EL-Centro波和人工地震波作用下桥梁横向地震反应的AMD控制进行了仿真计算,分析了控制模态数目和使用的作动器数目;同时,对AMD系统的参数进行设计,分析了不同质量块质量和弹簧刚度对优化目标函数和作动器最大出力的影响,推荐出适合南京长江二桥南汊桥的AMD系统基本参数. Using AMD system, a method for active control of long span cable-stayed bridges under seismic loads is presented. The motion equation order of bridge is reduced by modal technique, and the classical linear optimal control theory is employed. The present method has been used in the active control of seismic response of the Second Nanjing Yangtze River Bridge subjected to EL-Centro and man-made earthquake excitations. The controlled modes number and actuator configurations of bridge are discussed in details. Subsequently, the parameters of AMD system of long-span cable-stayed bridge are designed and optimized. The influences of mass and spring stiffness on the performance index and the maximum actor effect are analyzed. The basic parameters of AMD adapting to the Second Nanjing Yangtze River Bridge are recommended.
作者 李小珍 蔡婧 强士中 Li, Xiao-Zhen[1]; Cao, Jing[1]; Qiang, Shi-Zhong[1]
出处 《工程力学》 EI CSCD 北大核心 2003年第4期 78-85,44,共9页 Engineering Mechanics
基金 国家自然科学基金
关键词 南京长江二桥 地震反应 主动控制 AMD系统 参数设计 Control theory Dynamic response Earthquakes Optimization Stiffness
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参考文献9

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共引文献22

同被引文献28

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