筒式叠层摩擦阻尼器性能试验及应用研究

    Performance Test and Application Research of Cylindrical Laminated Friction Damper

    • 摘要: 为解决传统摩擦阻尼器在提供较大阻尼力时对正压力需求较高且滞回性能不稳定的问题,提出一种筒式叠层摩擦阻尼器,可以通过楔形体放大摩擦面所需的正压力,利用圆筒的环向约束提高阻尼器加压效率. 基于叠层的原理,中心加压装置提供的正压力可以同时施加给多个摩擦面. 采用摩擦性能更稳定的非石棉复合树脂摩擦片作为阻尼器的摩擦材料,避免传统金属摩擦面在多次循环后摩擦性能不稳定的问题. 对阻尼力理论公式进行推导,得到各构造参数对阻尼器出力的影响;通过力学性能试验和数值模拟对其滞回性能和减震效果展开分析. 结果表明:该阻尼器滞回性能稳定,耐疲劳性能优异,耗能性能良好,对实际结构具有较好的减震效果.

       

      Abstract: To solve the problem that the traditional friction damper has high demand for positive pressure and unstable hysteresis performance when providing large damping force, a new type of cylinder laminated friction damper was proposed. The wedge-shaped entity can amplify the positive pressure required by the friction surface, and the circumferential restriction of the cylinder can de used to improve the pressurization efficiency of the damper. Based on the principle of lamination, the positive pressure provided by the central pressure device can be applied to multiple friction surfaces at the same time. The non-asbestos composite resin friction sheet with more stable friction performance was used as the friction material of the damper to avoid the problem of unstable friction performance of the traditional metal friction surface after several cycles. The theoretical formula of the damping force was deduced, and the influence of each structural parameter on the output of the damper was obtained. The hysteretic performance and shock absorption effect were analyzed through mechanical performance test and numerical simulations. Results show that the damper has stable hysteretic performance, excellent fatigue resistance, good energy dissipation performance, and good shock absorption effect on the actual structure.

       

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