Abstract：As the aluminum foam/polyurethane composite (AF/PU) is a kind of composite which combines the viscoelastic behavior of polyurethane with the friction behavior of aluminum, an innovative friction damper (i.e. AF/PU friction damper) was developed by using AF/PU. In order to verify the advantages of the AF/PU friction damper which can possess viscoelastic damper and friction damper in energy dissipation, the AF/PU friction damper was examined based on a serial of tests with different loading frequency, displacement amplitude and loading cycles. Based on the performance indices such as the maximum force, stiffness and damping ratio, the mechanical properties of AF/PU friction damper were studied. The modified Bouc-Wen model was proposed to simulate the hysteretic curves of AF/PU friction damper, and then the simulated results were compared to the experimental results. The results show that the AF/PU friction dampers exhibit the full hysteresis loops and possess high and stable energy dissipation capacity. The AF/PU friction damper is a typical displacement amplitude-correlated and variable stiffness damper, and its mechanical properties are not sensitive to the loading frequency, but appear to be multi-phased with the increase of displacement amplitude and cycles. It is also found that the simulated results from the modified Bouc-Wen model agree well with the experimental results.
刘少波 李爱群 . 泡沫铝/聚氨酯复合材料摩擦阻尼器性能试验研究[J]. 土木工程学报, 2018, 51(8): 28-36.
Liu Shaobo Li Aiqun. Experimental study on a friction damper of aluminum foam/polyurethane interpenetrating phase composites. 土木工程学报, 2018, 51(8): 28-36.
