拉索振动控制及最优主动控制力的求解方法  

Cables Vibration Control and Solution of Its Optimal Active Force

作　　者：朱保兵[1] 

机构地区：[1]上海建筑设计研究院有限公司,200041

出　　处：《特种结构》2012年第3期1-5,共5页Special Structures

基　　金：上海市青年科技启明星计划项目(11QB1403200);上海建筑设计研究院青年科研基金项目(11-1类-0056-结)

摘　　要：拉索结构具有极高的强度和极轻的重量,而被广泛地应用于工程结构中。但同时由于其柔性大、阻尼小,外部激励或支座移动将极易使拉索产生低频谐振而可能导致破坏性事故发生,故需要有效的方法控制这种横向振动。文章在开环主动控制技术的基础上,提出了闭环轴向主动控制策略。应用线性二次型最优控制方法,达到了抑制拉索振动的目的,并经过逐步迭代计算求解出最优主动控制力。Cables are widely used in engineering structures due to their high strength and light weight.However, they are flexible and their inherent damping is typically small.Consequently,low frequency harmonic oscillation of cables can be easily induced by external forces or their support motions.Then some destructive accidents will happen,so that efficient control methods will be needed.Based on open loop active control technique,closed loop axial active control strategy was mentioned in this paper.Control of cables vibration is realized through linear quadratic optimal control strategy.Optimal active control force is given by iterative computation method.

关 键 词：拉索低频谐振 轴向主动控制 线性二次型最优控制 迭代计算 最优主动控制力 

分 类 号：TU399[建筑科学—结构工程] TU311.3