新型自复位变摩擦阻尼器力学性能研究

Study on mechanical properties of a new type of self-centering variable friction damper

本文提出了一种兼具自复位、变摩擦和高耗能于一体的新型自复位变摩擦阻尼器,其自复位功能由碟簧实现,变摩擦机构提供耗能作用。基于该阻尼器独特的构造形式推导了其恢复力模型,并利用MATLAB中的Simulink工具箱建立其动态仿真模型,并引用他人试验数据对比验证。结果表明:所建立的动态仿真模型能够较为准确地计算出阻尼器的恢复力模型;其耗能能力与初始压缩量及位移幅值呈现正相关特性,随着初始压缩量的增加,耗能能力可提高59.56%;加载频率对阻尼器耗能能力影响不大,具有稳定的耗能能力。文中所提出的阻尼器对实际工程的应用具有一定的参考价值。

In this paper,a new type of self-centering variable friction damper is proposed,which combines self-centering,variable friction and high energy consumption.Based on the unique structure of the damper,its restoring force model is derived,and its dynamic simulation model is established by using the Simulink toolbox in MATLAB,which is compared and verified by other test data.The results show that:the dynamic simulation model can accurately calculate the restoring force model of the damper;its energy consumption capacity is positively related to the initial compression and displacement amplitude,with the increase of the initial compression,the energy consumption capacity can be increased by 59.56%;the loading frequency has little effect on the energy consumption capacity of the damper,and has stable energy consumption capacity.The damper proposed in this paper has certain reference value for practical engineering application.