粘弹性阻尼器在结构减震控制中的位置优化研究
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摘要
提出一种粘弹性阻尼器优化设置的新型优化数学模型,同时考虑了地震作用下的三种结构控制指标。首先假定优化模型的五种加权系数组合,在阻尼器数量一定的前提下,利用遗传算法对不同形式的结构在四类场地条件地震动作用下的粘弹性阻尼器进行位置优化。然后引入两个性能评价指标,对五种系数组合情况时阻尼器最优布置下的结构反应进行分析研究,使阻尼器布置方案能体现综合控制效果上的最优,得到不同情况下加权系数的建议取值组合。数值算例验证了新模型的有效性,最后,对粘弹性阻尼器优化布置方面提出几点有意义的结论。
A new mathematic model of location optimization for viscoelastic dampers is established.Three response control indices are considered in this model.Firstly,five combination modes of these indices are presented.On the premise that the number of dampers is fixed,the optimal placement of viscoelastic dampers for several building models with different number of stores and ground motions at four types of sites is dealt with using genetic algorithm.Secondly,two new indices are brought forward to assess the reasonable combination mode of coefficients under different conditions,which can generally express the best response control.Some numerical examples are illustrated to verify effectiveness and feasibility of the new mathematic model proposed.At last,several significant conclusions are given.
A new mathematic model of location optimization for viscoelastic dampers is established.Three response control indices are considered in this model.Firstly,five combination modes of these indices are presented.On the premise that the number of dampers is fixed,the optimal placement of viscoelastic dampers for several building models with different number of stores and ground motions at four types of sites is dealt with using genetic algorithm.Secondly,two new indices are brought forward to assess the reasonable combination mode of coefficients under different conditions,which can generally express the best response control.Some numerical examples are illustrated to verify effectiveness and feasibility of the new mathematic model proposed.At last,several significant conclusions are given.
引文
[1]李宏男,常治国,赵柏东.微种群遗传算法优化结构振动控制[J].地震工程与工程振动,2002,22(5):92—96.
[2]李宏男,金峤.遗传BP神经网络主动AMD对偏心结构的减震控制[J].地震工程与工程振动,2003,23(2):134—142.
[3]Zhang R H,Soong TT.Seismic design of viscoelastic damp-ers for structural applications[J].Journal of Structural Engi-neering,ASCE,1992,118(5):1375—1392.
[4]G櫣rg ze M,M櫣ller P C.Optimal positioning of dampers inmulti-body systems[J].Sound Vibration.1992,158:517—530.
[5]Mahendra P.Singh,Luis M.Moreschi.Optimal placement ofdampers for passive response control[J].Earthquake Engi-neering and Structural Dynamics,2002,31:955—976.
[6]周云,徐赵东,邓雪松.粘弹性阻尼结构中阻尼器的优化设置[J].世界地震工程,1998,14(3):15—20.
[7]张琴,楼文娟,陈勇.粘弹性阻尼器位置优化目标函数及其实现方法[J].工业建筑,2003,33(6):10—13.
[8]Chang K C,Lai ML,Soong TT,et al.Seismic behavior anddesign guidelines for steel frame structures with added viscoe-lastic damper[R].NCEER 93-0009,National Center forEarthquake Engineering Research,Buffalo,NY.1993a.
[9]徐赵东,周云,赵鸿铁.粘弹性阻尼结构的优化设计方法[J].西安建筑科技大学学报,1999,31(3):246—248.
[10]谢礼立,瞿长海.最不利设计地震动研究[J].地震学报,2003,25(3):250-261.
[2]李宏男,金峤.遗传BP神经网络主动AMD对偏心结构的减震控制[J].地震工程与工程振动,2003,23(2):134—142.
[3]Zhang R H,Soong TT.Seismic design of viscoelastic damp-ers for structural applications[J].Journal of Structural Engi-neering,ASCE,1992,118(5):1375—1392.
[4]G櫣rg ze M,M櫣ller P C.Optimal positioning of dampers inmulti-body systems[J].Sound Vibration.1992,158:517—530.
[5]Mahendra P.Singh,Luis M.Moreschi.Optimal placement ofdampers for passive response control[J].Earthquake Engi-neering and Structural Dynamics,2002,31:955—976.
[6]周云,徐赵东,邓雪松.粘弹性阻尼结构中阻尼器的优化设置[J].世界地震工程,1998,14(3):15—20.
[7]张琴,楼文娟,陈勇.粘弹性阻尼器位置优化目标函数及其实现方法[J].工业建筑,2003,33(6):10—13.
[8]Chang K C,Lai ML,Soong TT,et al.Seismic behavior anddesign guidelines for steel frame structures with added viscoe-lastic damper[R].NCEER 93-0009,National Center forEarthquake Engineering Research,Buffalo,NY.1993a.
[9]徐赵东,周云,赵鸿铁.粘弹性阻尼结构的优化设计方法[J].西安建筑科技大学学报,1999,31(3):246—248.
[10]谢礼立,瞿长海.最不利设计地震动研究[J].地震学报,2003,25(3):250-261.
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