scholarly journals Numerical evaluation of a novel passive variable friction damper for vibration mitigation

2020 ◽  
Vol 220 ◽  
pp. 110920
Author(s):  
Vahid Barzegar ◽  
Simon Laflamme ◽  
Austin Downey ◽  
Meng Li ◽  
Chao Hu
Keyword(s):  
Numerical Evaluation ◽  
Friction Damper ◽  
Vibration Mitigation ◽  
Variable Friction

scholarly journals COMPARE THE EFFICIENCY OF CONTROLLED STIFFNESS DAMPER WITH VARIABLE FRICTION DAMPER FOR SEISMIC PROTECTION OF BUILDING

2009 ◽  
Vol 12 (8) ◽  
pp. 81-89
Author(s):  
Phuc Quang Bao Nguyen ◽  
Hoa Nhan Pham ◽  
Thang Quoc Chu
Keyword(s):  
Control Method ◽  
Seismic Protection ◽  
Control Law ◽  
Modal Control ◽  
Clamping Force ◽  
Friction Damper ◽  
Vibration Mitigation ◽  
Friction Dampers ◽  
Advantages And Disadvantages ◽  
Variable Friction

The implementation of variable friction dampers (VFD) for vibration mitigation of seismic structures generally requires an efficient semi-active control law. In this paper, a semi-active modal control method is proposed to determine the controllable clamping force of a variable friction damper. A comparative study was performed on a multiple DOF structure controlled by passive friction dampers, variable friction dampers in subsection numerical examples. Finally, this paper also provides preliminary conclusions about the advantages and disadvantages for friction dissipators.

Passive Variable Friction Damper for Increased Structural Resilience to Multi-Hazard Excitations

2018 ◽  
Author(s):  
Austin Downey ◽  
MohammadKazem Sadoughi ◽  
Liang Cao ◽  
Simon Laflamme ◽  
Chao Hu
Keyword(s):  
Structural Control ◽  
Seismic Event ◽  
Active Damping ◽  
Friction Damper ◽  
Strength Based ◽  
Story Drift ◽  
Variable Friction ◽  
Wind Events ◽  
Better Than ◽  
Damping Systems

Structural control systems, including passive, semi-active and active damping systems, are used to increase structural resilience to multi-hazard excitations. While semi-active and active damping systems have been investigated for the mitigation of multi-hazard excitations, their requirement for real-time controllers and power availability limit their usefulness. This work proposes the use of a newly developed passive variable friction device for the mitigation of multi-hazard events. This passive variable friction device, when installed in a structure, is capable of mitigating different hazards from wind and ground motions. In wind events, the device ensures serviceability, while during earthquake events, the device reduces the building’s inter-story drift to maintain strength-based motion requirements. Results show that the passive variable friction device performs better than a traditional friction damper during a seismic event while not compromising any performance during wind events.

scholarly journals A new lever-type variable friction damper for freight bogies used in heavy haul railway

2016 ◽  
Vol 24 (3) ◽  
pp. 159-165
Author(s):  
Ximing Xu ◽  
Maohai Fu ◽  
Zhaoxia Xu ◽  
Zhongyi Chen
Keyword(s):  
Friction Damper ◽  
Heavy Haul ◽  
Variable Friction ◽  
Type Variable ◽  
Heavy Haul Railway

716 Passive Vibration Ioslation System by Variable Friction Damper

2003 ◽  
Vol 2003 (0) ◽  
pp. _716-1_-_716-5_
Author(s):  
Yoshihito SATOH ◽  
Hideya YMAGUCHI
Keyword(s):  
Friction Damper ◽  
Variable Friction
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