摘要
本文作者研制了一种新型的形状记忆合金拉压型超弹性阻尼器,介绍了其构造和工作原理,并进行了力学性能试验。试验结果表明:(1)对形状记忆合金阻尼器中NiTi丝缆施加初始预变形可以获得不同的迟滞循环行为,施加预变形到超弹性平台的中点位置,阻尼器可以获得较为饱满的迟滞环和稳定的阻尼力;(2)位移幅值影响阻尼器的力学性能,随着位移幅值的增加,阻尼器的等效刚度逐渐减小,等效阻尼比逐渐线性增大;(3)加载速率影响阻尼器的力学性能,随着加载速率的增加,滞回环变得狭长,其包围的面积逐渐减小,阻尼器的等效刚度略有提高,等效阻尼比逐渐减小。
A damper device based on shape memory alloy (SMA) superelastic wires is developed for structural vibration control in this paper. The design and the working principle of the damper are outlined. The experiment is carried out to investigate the energy dissipation mechanism of the damper. The experimental results illustrate that loading rate, prestrain and the amplitude of displacement influencing the energy dissipation behavior of the damper and the developed SMA dampers is an efficient energy dissipation devices.
出处
《地震工程与工程振动》
CSCD
北大核心
2003年第5期205-208,共4页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助项目(50038010)
