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Developed steady-state response for a new hybrid damper mounted on structures
Mohammad Ziaee1, Farzad Hejazi2
1Department of Civil Engineering, University Putra Malaysia, Seri Kembangan, Malaysia.
A new hybrid system combining viscous damping and Coulomb friction effectively reduces structural vibrations. This innovative approach enhances structural responses during dynamic loads, offering improved safety and stability.
Area of Science:
- Structural Engineering
- Mechanical Engineering
- Vibration Control
Background:
- Coulomb friction is a known method for reducing structural responses to dynamic excitations.
- Severe oscillations often require supplementary mechanisms beyond friction to mitigate destructive vibration effects.
Purpose of the Study:
- To develop a novel Hybrid System (HS) integrating Viscous Damping (VD) and Coulomb friction.
- To enhance structural resilience against dynamic loads through a combined damping approach.
Main Methods:
- Embedding viscous damper effects into Den Hartog's equation of motion for a Single-Degree-of-Freedom (SDOF) Coulomb system.
- Developing a hybridized damping mechanism (HDM) for dynamic load scenarios.
Main Results:
- The proposed HDM reduced maximum displacement by 1% to 98% across various force amplitudes and viscous damping ratios.
- The HDM increased time lag by up to 24% for frequency ratios exceeding 1.
Conclusions:
- The developed hybridized system offers a new generation of Tuned Mass Damper (TMD).
- This system significantly improves energy dissipation efficiency, particularly under severe dynamic excitations.
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