采用形状记忆合金对斜拉索的振动控制试验研究
Experimental Study on Vibration Control of Stay Cables Using Shape Memory Alloy (SMA)
本文利用SMA变弹性模量的特性，提出了将它与拉索轴向连接进行拉索振动控制的方法，并进行了探索性的试验研究。针对实际情况提出了通过周期切换SMA状态给拉索不断施加扰动的方式进行制振的实际控制策略。在试验室里张拉了11.7米长的模型拉索，利用水冷－水热方式对SMA丝进行加热冷却。 试验采用实际控制策略，对分别连接Φ3mm和Φ1mm两种不同直径的SMA丝的拉索在不同控制周期下的一阶自由振动做了研究。试验结果表明：（1）SMA在奥氏体状态与马氏体状态切换时，拉索索力将有明显的变化。连接Φ3mm SMA的拉索索力变化大小与理论值吻合很好，而连接Φ1mm的索力变化与之相变却要小的多；（2）对连接Φ3mm SMA丝的拉索，控制效果随着控制周期的减小而提高，但总的来讲，与未控制情况相比，控制效果并不明显；（3）水冷－水热方式对SMA加热冷却的速度令人满意。
n this paper, exploratory research is carried on the cable vibration control utilizing the variable stiffness of SMA, which is connected with cable directly. Control strategy for practice is put forward, which gives the vibrating cable some perturbation periodically by changing temperature of SMA periodically. A model cable of 11.7 meters in long is set up for experiment, and equipment of water-heating /cooling to heat up or cool down SMA rapidly is designed. SMA ribbons of Φ3mm and Φ1mm are used for comparison. SMA of Φ3mm keeps in elasticity in experiment, and SMA of Φ1mm is in the state of large strain when subjected to the initial tension. In the practical control strategy, the first-order free vibration of cable is studied for various control period and two types of SMA. The experimental result shows: (1) The cable tension is different when SMA in Austenite or in Marstensite. For the cable connected to SMA of Φ3mm, the experimental value of difference of cable tension is almos
吕晓天、孙利民
材料科学工程基础科学
形状记忆合金（SMA），斜拉索半主动控制，试验研究
shape memory alloy (SMA) stay cables vibration experimental study semiactive control
吕晓天,孙利民.采用形状记忆合金对斜拉索的振动控制试验研究[EB/OL].(2005-08-05)[2025-08-21].http://www.paper.edu.cn/releasepaper/content/200508-43.点此复制
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