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.