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  

Numerical Simulation and Experimental Study for Vibration of Simple Cable Network with Shape Memory Alloy Cross-Tie

作　　者：周海俊[1] 陈朝骏 杨夏[1] 林焙淳 

机构地区：[1]深圳大学广东省滨海土木工程耐久性重点实验室,广东深圳518060

出　　处：《重庆交通大学学报（自然科学版）》2014年第1期8-11,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51108269);深圳市基础研究计划项目(JC201005280580A)

摘　　要：采用有限元软件建立了形状记忆合金(Shape Memory Alloy,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一根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。The simple cable network model with a shape memory alloy （SMA） cross-tie was established by Finite Element Method （FEM）. And the model was composed of two parallel cables and a SMA cross-tle. The modal damping ratio was calculated from the simulated free vibration time curves of the simplified cable network and the vibration of the cable network was analyzed. The different damping effects between SMA cross-tie and common steel cross-tie were studied. The results show that the damping effect of SMA cross-tie is better than common steel cross-tie. It is found that the numerical simulation results are in good accordance with the modal test results.

关 键 词：形状记忆合金 辅助索 索网 模态阻尼比 有限元方法 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]