格栅式摩擦阻尼器的试验研究与数值模拟

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (4) : 96-105.

论文

格栅式摩擦阻尼器的试验研究与数值模拟

朱立华1，李钢1，董志骞1，李宏男1,2

作者信息 +

An experimental study and numerical simulation of lattice-shaped friction devices

ZHU Lihua1，LI Gang1，DONG Zhiqian1，LI Hongnan1,2

Author information +

文章历史 +

摘要

位移型阻尼器具有较小的屈服后刚度，在大震下会出现刚度的突然减小，出现明显的损伤集中现象，造成修复成本较高。提出了一种由多种耗能单元组成的新型格栅式摩擦阻尼器，该装置具有屈服后硬化刚度、双重耗能机制、多节点耗能等特点。对耗能单元设计了含6组试件的系数比测定试验和2组试件的耗能单元拟静力试验，并建立了数值模型。系数比测定试验表明：与黄铜摩擦材料相比，无石棉树脂摩擦材料性能更稳定、摩擦出力大；无石棉树脂材料系数比逐渐减小至恒定值，而黄铜材料系数比先增后降至恒定值。通过耗能单元的拟静力试验发现，平动摩擦和转动摩擦行为协同工作良好，耗能单元具有预期的屈服后刚度硬化行为，表现了多阶段耗能特性；其出力中各组分比例可通过控制试件设计参数(如截面尺寸、杆件数量和施加扭矩)进行调整。最后建立了实体单元数值模型，表明数值模拟结果与试验值吻合较好。

Abstract

A new type of lattice-shaped friction damper, composing of many energy dissipation units, was proposed.The device has hardening post-yielding stiffness, dual energy dissipation mechanism and multiple energy dissipation nodes.Measurements of the friction coefficient and torque coefficient ratio, and quasi-static analysis of the lattice-shaped friction unit (LSFU) were successively conducted.The test results were compared with that of the numerical simulation.The results of coefficient ratio test show that the non-asbestos-organic (NAO) friction material has more stable performance and large friction resistance comparing with the brass.The results of quasi-static test for LSFU show that the translational friction and rotational friction work well together.The unit has the expected hardening post-yielding stiffness and exhibits multi-phased seismic performance.The proportion of each resistance component can be adjusted by controlling mechanical parameters.Finally, a numerical model was established, which demonstrates that the results of numerical simulation agree well with that of experiment.

导出引用

朱立华1，李钢1，董志骞1，李宏男1,2. 格栅式摩擦阻尼器的试验研究与数值模拟[J]. 振动与冲击, 2020, 39(4): 96-105

ZHU Lihua1，LI Gang1，DONG Zhiqian1，LI Hongnan1,2. An experimental study and numerical simulation of lattice-shaped friction devices[J]. Journal of Vibration and Shock, 2020, 39(4): 96-105

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