新型形状记忆合金隔震支座设计与分析
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摘要
利用形状记忆合金(Shape Memory Alloy,SMA)的独特性能研制合适的隔震装置是SMA在隔震领域应用的关键之一。利用SMA超弹性特性设计了一种超弹性SMA隔震支座;根据该支座构造及其工作原理推导了该支座的理论模型,进而建立有限元模型,应用理论模型进行数值模拟并与有限元结果进行了对比;数值分析了SMA棒长度、SMA棒半径和SMA棒与水平向夹角等主要参数对SMA支座力学性能的影响。结果表明,所设计的SMA隔震支座呈现出非线性滞回特性,合理调节支座各参数能够在一定程度改善支座性能。
With regard to the application of shape memory alloy(SMA) in isolation field,investigation of isolation devices based on the unique performance of SMA is one of the key points.In order to study the SMA isolation effects,a super-elastic SMA isolator was designed.Its theoretical calculation model was deduced according to its structural construction and working principle.A finite element model was further established,the calculation results by which were to be compared with the results by the theoretical model.Then the main parameters of the isolator such as length of the SMA rods,radius of the SMA rods,angles between SMA rods and horizontal direction were disscussed,and their effects on SMA isolators' mechanical properties were numerically analyzed.The results indicate that the SMA isolator shows a nonlinear hysteresis behavior,and its properties can be improved in some degree by adjusting parameters reasonably.
With regard to the application of shape memory alloy(SMA) in isolation field,investigation of isolation devices based on the unique performance of SMA is one of the key points.In order to study the SMA isolation effects,a super-elastic SMA isolator was designed.Its theoretical calculation model was deduced according to its structural construction and working principle.A finite element model was further established,the calculation results by which were to be compared with the results by the theoretical model.Then the main parameters of the isolator such as length of the SMA rods,radius of the SMA rods,angles between SMA rods and horizontal direction were disscussed,and their effects on SMA isolators' mechanical properties were numerically analyzed.The results indicate that the SMA isolator shows a nonlinear hysteresis behavior,and its properties can be improved in some degree by adjusting parameters reasonably.
引文
[1]赵连城,蔡伟,郑玉峰.合金的形状记忆效应与超弹性[M].北京:国防工业出版社,2002.
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[10]吴冬梅,刘树堂,刘智勇.SMA-滚动隔震火炬塔的地震反应分析[J].广州大学学报(自然科学版),2007,6(1):82-86.
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[12]ANSYS(.User manual[R].Swanson Analysis System,USA,1999.
[13]颜学渊,张永山,王焕定,等.三类三维隔震抗倾覆支座力学性能试验研究[J].振动与冲击,2009,28(10):49-53.
[14]庄表中,李振华,季龙飞,等.隔震支座动态特性的测试与识别[J].振动与冲击,2009,28(10):221.
[2]Dolce M,Cardone D,Marnetto R.Implementation andtesting of passive control devices based on shape memoryalloys[J].Earthquake Engineering and Structural Dynamics,2000,29(2):945-968.
[3]Mayes J J,Lagoudas D,Henderson B K.An experimentalinvestigation of shape memory alloy pseudoelastic springs forpassive vibration isolation[J].Journal of Intelligent MaterialSystem and Structures,2004,15(6):443-470.
[4]Khan M M,Lagoudas D.Modeling of shape memory alloypseudoelastic spring elements using Preisach model forpassive vibration isolation[C]//Modeling,signalprocessing,and control,Proceedings of SPIE,San Diego,2002,4693:336-346.
[5]Corbi O.Shape memory alloys and their application instructural oscillations attenuation[J].Simulation ModelingPractice and Theory,2003,11:387-402.
[6]庄鹏,薛素铎,李彬双.SMA-橡胶支座隔震系统的动力响应研究[J].振动与冲击,2006,25(3):85-89.
[7]庄鹏,薛素铎,李彬双.SMA-橡胶支座滞回性能的理论模型[J].北京工业大学学报,2006,32(10):890-894.
[8]陈海全,李忠献,刘东民.基于SMA复合橡胶支座的桥梁隔震[J].天津大学学报,2006,39(S1):198-202.
[9]刘海卿,李忠献.应用形状记忆合金-橡胶复合支座的结构隔震[J].自然灾害学报,2006,15(3):123-127.
[10]吴冬梅,刘树堂,刘智勇.SMA-滚动隔震火炬塔的地震反应分析[J].广州大学学报(自然科学版),2007,6(1):82-86.
[11]陈鑫,李爱群,左晓宝.超弹性形状记忆合金简化多维本构模型[J].东南大学学报(自然科学版),2009,39(4):813-818.
[12]ANSYS(.User manual[R].Swanson Analysis System,USA,1999.
[13]颜学渊,张永山,王焕定,等.三类三维隔震抗倾覆支座力学性能试验研究[J].振动与冲击,2009,28(10):49-53.
[14]庄表中,李振华,季龙飞,等.隔震支座动态特性的测试与识别[J].振动与冲击,2009,28(10):221.