新型弧面摩擦阻尼器力学性能研究

为克服传统摩擦阻尼器自适应能力差及耗能能力低的缺点，提出了一种新型弧面摩擦阻尼器，该阻尼器的结构特征在于其摩擦板和滑块的滑移面均为弧形，两滑块之间装有压缩橡胶，阻尼器通过摩擦板与滑块之间的移动产生摩擦力实现耗能。建立了阻尼器的机理模型，并采用数值模型验证了机理模型的合理性，分析了加载频率和橡胶弹簧初始压缩量对阻尼器滞回阻尼特性的影响规律。研究结果表明：该新型阻尼器具有马鞍形滞回曲线，其摩擦力具有位移随变性；该阻尼器的耗能能力比传统摩擦阻尼器强，耗能能力最多提高了23.84%；其力学性能与加载频率相关性较小，而橡胶弹簧预紧力越大，阻尼器的滞回耗能能力越强。

Research on Mechanics Performance of a New Cambered Friction Damper

A new cambered friction damper was developed, which enabled to overcome the shortages such as poor adaptive capacity and low energy dissipation capacity. There was a block of rubber sandwiched between two sliders bent in a certain configuration. Frictional plates and the sliders were curved. The device dissipates energy through friction between the plate and slider. The mechanism model of the damper was established, and its rational was verified by numerical model. The influences of the initial compression of the rubber and the load frequency on the hysteresis damping characteristics of the damper were conducted. It is shown that the hysteretic curve of the damper is in map of pommel horse and the frictional force is varied with displacement. The energy dissipation capacity of the damper is stronger than that of the conventional one, which exceeds over 23.84%. The damper mechanics properties are less relevant with loading frequency, while the larger the rubber spring preload is, the stronger its energy dissipation energy capacity is.