一种新型金属变摩擦耗能器的研发与应用

基于被动控制理论,提出一种新型的金属变摩擦耗能阻尼器。通过改变金属摩擦面的摩擦面积,使摩擦系数具有随位移改变而变化的特性。在金属摩擦学理论的基础上,建立了金属变摩擦耗能器的阻尼力计算模型与产品的开发。理论计算与实验数据表明:新型金属变摩擦耗能器的减震性能显著优于常规阻尼器,避免了传统阻尼装置(如油阻尼器)存在的造价高、维护复杂、易漏油的问题;克服了常规摩擦耗能器不能在不同大小荷载作用下保持同样控制效果的缺点,能做到抗震耗能器在不同荷载下保持很好的抗震效果,真正做到"小震小位移少耗能,大震大位移多耗能"的智能控制。

Research & Application of New Metal Damper of Variable Friction

Based on the passive control theory,this article presents a new type of metal variable friction damper which depends on energy dissipation.By changing the friction area of metal friction surface,the friction coefficient varies with the change of displacement.On the basis of the theory of metal tribology,we establish damping force calculation model and product development for metal variable friction dampers.Theoretical calculation results and experimental data show that the damping performance of the new metal variable friction damper is significantly better than that of conventional dampers.The proposed damper avoids the defects of the traditional damping devices,such as those of oil dampers: high cost,complicated maintenance and easy spilling.It also overcomes the problem that conventional friction dampers cannot maintain the same control effect in different sizes and loads.The new metal variable friction damper maintains excellent anti-seismic effect under different loads,i.e.less energy consumption and smaller displacement in small earthquakes,while more energy consumption and larger displacement in heavy earthquakes.