SMA弹簧-摩擦支座的滞回性能研究

庄 鹏1, 2,薛素铎3,韩 淼1, 2,聂 攀1,王文婷1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 94-100.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 94-100.
论文

SMA弹簧-摩擦支座的滞回性能研究

  • 庄 鹏1, 2,薛素铎3,韩 淼1, 2,聂 攀1,王文婷1
作者信息 +

Study on hysteretic performance of SMA spring-friction bearing

  • ZHUANG Peng1, 2, XUE Su-duo3, Han Miao1, 2, Nie Pan1,Wang Wen-ting1
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文章历史 +

摘要

本文研究了一种新型形状记忆合金弹簧-摩擦支座(SMA Spring-Friction Bearing,简称SFB)的滞回性能。首先,研制了可用于SFB的大尺寸超弹性NiTi记忆合金(NiTi SMA)螺旋弹簧。在此基础上,加工制作了SFB试件实物模型,对其进行了拟静力试验研究。考察了竖向压力、位移幅值和加载频率对SFB恢复力-位移曲线以及等效刚度、单位循环耗能、等效阻尼比和等效动摩擦系数的影响。最后,将SMA螺旋弹簧恢复力模型和摩擦力模型相叠加,建立了SFB的恢复力模型,利用该模型进行了数值模拟。研究结果表明:SFB可提供饱满的滞回曲线,耗能能力较强,且具有一定的复位能力;数值结果与试验结果吻合较好,验证了SFB恢复力模型的正确性。

Abstract

In this paper, hysteretic performance of a new type of isolator called shape memory alloy spring-friction bearing (SFB) is studied both experimentally and theoretically. First, large scale superelastic NiTi SMA helical springs used for the SFB are developed. Then, the SFB specimen is designed and fabricated. Next, the quasi-static tests on the SFB under different loading conditions are conducted to study the influence of vertical pressure, displacement amplitude and loading frequency on the hysteretic curves and the mechanical parameters, such as the equivalent stiffness, the energy dissipation per cycle, the equivalent damping ratio and the equivalent kinetic friction coefficient. Finally, combining the restoring force model of SMA spring and the model of friction force, a simplified restoring force model of the SFB is established, which is employed to simulate hysteretic behavior of the proposed isolation device. The results show that the SFB exhibits unique restoring force-displacement curves and provides full hysteretic curves, excellent energy dissipation capacity and moderate re-centering feature. Moreover, the numerical results match closely with the experimental data, proving the validity of the restoring force model of the SFB.
 

关键词

滑动隔震支座 / SMA螺旋弹簧 / 滞回性能 / 拟静力试验 / 理论模型

Key words

sliding isolation bearing / SMA helical spring / hysteretic performance / quasi-static test / theoretical model

引用本文

导出引用
庄 鹏1, 2,薛素铎3,韩 淼1, 2,聂 攀1,王文婷1. SMA弹簧-摩擦支座的滞回性能研究[J]. 振动与冲击, 2016, 35(9): 94-100
ZHUANG Peng1, 2, XUE Su-duo3, Han Miao1, 2, Nie Pan1,Wang Wen-ting1. Study on hysteretic performance of SMA spring-friction bearing[J]. Journal of Vibration and Shock, 2016, 35(9): 94-100

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