An experimental study and numerical simulation of lattice-shaped friction devices
ZHU Lihua1，LI Gang1，DONG Zhiqian1，LI Hongnan1,2
1.State Key Laboratory of Costal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China;
2.College of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
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.
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. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(4): 96-105.
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