为使减震装置具有复阻尼特征，提出一种板式变摩擦阻尼器。基于静力平衡条件推导了根据阻尼器几何、物理参数确定其滞回模型的理论公式，采用非线性有限元对阻尼器在静力往复作用下的滞回曲线进行了模拟，通过低周往复试验进行了阻尼器滞回性能试验研究，基于上述方法对影响滞回性能的关键参数进行了研究。研究结果：该阻尼器的滞回曲线为位于一三象限、关于原点对称的三角形，理论公式和数值模拟得到的滞回曲线与试验数据吻合得较好，影响阻尼器滞回性能的关键因素是弹簧刚度、2个摩擦系数和1个角度。结果表明该阻尼器的滞回曲线具有明显的复阻尼特征，滞回模型的理论公式和数值模拟提供结果可以用于指导此类阻尼器的设计。
Abstract
A plate type variable friction damper is proposed in order to make the damping devices have complex damping characteristics. Based on static equilibrium conditions, the theoretical formulas of damper hysteretic model according to its geometric and physical parameters were derived. And the damper hysteretic curve was simulated using nonlinear finite element analysis. Some periodic static test on hysteretic behavior of the damper was conducted. The key parameters affecting the hysteresis performance based on the above methods were investigated. The results showed that hysteresis curves of the damper are symmetrical triangle about the origin and locate in first and third quadrants, Hysteresis curve of theoretical formulas and numerical simulation agreed very well with the experimental results, the key factors affecting the damper hysteretic performance are spring stiffness, two friction coefficients and one angle. It showed that the damper hysteresis curve has obviously complex damping characteristics, the results of theoretical formulas and numerical simulation of the hysteretic model can be used as a preliminary method to design this damper.
关键词
复阻尼 /
变摩擦阻尼器 /
理论公式 /
性能试验 /
数值模拟
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Key words
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complex damping；variable friction damper；theoretical formula；performance test；numerical simulation
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