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形状记忆合金辅助索-简化索网模型振动特性的数值模拟及试验研究

DOI: 10.3969/j.issn.1674-0696.2014.01.02, PP. 8-11

Keywords: 形状记忆合金,辅助索,索网,模态阻尼比,有限元方法,SMA(ShapeMemoryAlloy),c1oss-ties,cablenetwork,modaldampingratio,FEM

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Abstract:

:?采用有限元软件建立了形状记忆合金(ShapeMemoryAlloy,简称SMA)辅助索-简化索网系统模型,该简化索网模型由两根平行的拉索和-根SMA辅助索所组成。由数值模拟得到的简化索网模型的自由振动时程曲线,计算得到振动模态阻尼比,分析了索网系统的振动特性。研究了SMA辅助索连接与普通钢绞线辅助索两种不同连接方式对索网系统阻尼的影响,结果表明:SMA辅助索的减振效果是比普通钢丝辅助索要好。对比数值模拟结果与模型实验结果,发现两者吻合良好。

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