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传统的摩擦阻尼器往往只具有单一起滑力,很难兼顾中震与大震对阻尼器性能的要求。本文提出了一种“弹簧—坡面”机构,可以通过调整坡面角度与弹簧刚度使摩擦力与变形成正比,产生三角形滞回曲线。以此为基础,结合工程实际需要,又提出了弹簧—复合坡面机构,此机构能够产生“狗骨形”滞回曲线。本文推导出了弹簧—坡面机构及弹簧—复合坡面机构的阻尼力模型。并对一弹簧—复合坡面变摩擦阻尼器试件进行试验研究,包括等位移增量滞回循环试验、最大变形滞回循环试验,不同起滑力下阻尼器滞回性能试验等,试验所得滞回曲线稳定,满足工程中对阻尼器性能的要求。将试验结果与理论分析作对比,试验结果与理论解基本吻合。
Traditional friction dampers often have only a single sliding force, it is difficult to take into account the moderate and large shock on the damper performance requirements. This paper presents a “spring - slope ” mechanism, you can adjust the slope angle and spring stiffness so that friction and deformation is proportional to the triangle hysteresis curve. Based on this, combined with the practical needs of the project, a spring-composite slope mechanism was proposed, which can produce a “dogbone” hysteresis curve. The paper deduces the damping force model of spring-slope mechanism and spring-composite slope mechanism. And a spring - compound slope friction damper test specimens, including incremental displacement hysteresis loop test, the maximum deformation of the hysteresis loop test, hysteresis performance under different hysteresis damper hysteresis, the test results Hysteresis curve is stable, to meet the performance requirements of the damper. The test results and theoretical analysis for comparison, the experimental results are basically consistent with the theoretical solution.