SMA被动-自适用控制装置及结构地震反应控制分析
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摘要
针对SMA被动控制装置减震效果不理想的问题,通过对SMA本构关系的分析,得出SMA弹性模量与温度的关系式,并对超弹性SMA和形状记忆SMA进行了材料性能试验研究.利用SMA弹性模量随温度变化特性和SMA超弹性滞回耗能特性,设计了一种新型SMA被动-自适用控制装置,并给出SMA控制装置最大输出控制力和等效刚度的计算公式.最后,针对某三层框架结构,分别在未控、主动控制和SMA半主动控制三种情况下,进行了地震时程仿真分析.结果表明:大震下框架结构底层位移和加速度反应幅值分别降低50.4%和41.7%,控制效果接近主动控制效果.
In order to increase the prediction accuracy of protein folding,a prediction strategy of combining the improved simulated annealing algorithm and the sequential quadratic programming is brought forward.In this strategy,the sequential quadratic programming is introduced into the simulated annealing algorithm with tempering annealing function,and its local optimization capacity is used to optimize the optimal result gained by the simulated annealing algorithm once more,then the global optimization can be achieved.Simulation results show that the proposed method can effectively improve the prediction accuracy of protein folding by comparison with other methods.
In order to increase the prediction accuracy of protein folding,a prediction strategy of combining the improved simulated annealing algorithm and the sequential quadratic programming is brought forward.In this strategy,the sequential quadratic programming is introduced into the simulated annealing algorithm with tempering annealing function,and its local optimization capacity is used to optimize the optimal result gained by the simulated annealing algorithm once more,then the global optimization can be achieved.Simulation results show that the proposed method can effectively improve the prediction accuracy of protein folding by comparison with other methods.
引文
[1]欧进萍.结构振动控制-主动、半主动与智能控制[M].北京:科学出版社,2003.
[2]BAZ A,IMAM K.Active vibration control of flexiblebeams using shape memory actuators[J].Journal ofSound and Vibration,1990,140(3):437-456.
[3]RUSTIGHI E,M J BRENNAN.A shape memory alloy a-daptive tuned vibration absorber:design and implementa-tion[J].Smart Material and Structure,2005,14(1):19-28.
[4]DOLCE M,CARDONE D,MARNETTO R.Implementa-tion and testing of passive control devices based on shapememory alloys[J].Earthquake Engineering and Struc-tural Dynamics,2000,29(7):945-968.
[5]李冀龙,欧进萍.X形和三角形SMA板式阻尼器的阻尼力模型[J].地震工程与工程振动,2002,22(6):109-114.
[6]HAN Yulin,XING Dejin,XIAO Ertian.NiTi-wire shapememory alloy dampers to simultaneously damp tension,compression and torsion[J].Journal of Vibration andControl,2005,11(8):1067-1084.
[7]薛素铎,董军辉,卞晓芳.新型SMA阻尼器在体育场挑篷结构中的减振效果分析[J].空间结构,2004,10(2):3-7.
[8]DESROCHES R,MCCORMICK J.Cyclic properties ofsuperelastic shape memory alloy wires and bars[J].Journal of Structural Engineering,2004,130(1):38-46.
[2]BAZ A,IMAM K.Active vibration control of flexiblebeams using shape memory actuators[J].Journal ofSound and Vibration,1990,140(3):437-456.
[3]RUSTIGHI E,M J BRENNAN.A shape memory alloy a-daptive tuned vibration absorber:design and implementa-tion[J].Smart Material and Structure,2005,14(1):19-28.
[4]DOLCE M,CARDONE D,MARNETTO R.Implementa-tion and testing of passive control devices based on shapememory alloys[J].Earthquake Engineering and Struc-tural Dynamics,2000,29(7):945-968.
[5]李冀龙,欧进萍.X形和三角形SMA板式阻尼器的阻尼力模型[J].地震工程与工程振动,2002,22(6):109-114.
[6]HAN Yulin,XING Dejin,XIAO Ertian.NiTi-wire shapememory alloy dampers to simultaneously damp tension,compression and torsion[J].Journal of Vibration andControl,2005,11(8):1067-1084.
[7]薛素铎,董军辉,卞晓芳.新型SMA阻尼器在体育场挑篷结构中的减振效果分析[J].空间结构,2004,10(2):3-7.
[8]DESROCHES R,MCCORMICK J.Cyclic properties ofsuperelastic shape memory alloy wires and bars[J].Journal of Structural Engineering,2004,130(1):38-46.
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