Structural vibrations are one of the main concerns of engineering in recent decades. The tendency towards a flexible structure such as tall structures or structures with long spans has caused in more intense movements of the structure under service loading. Limiting acceleration in tall and slender buildings and controlling vibrations is one of the complex issues in design. In this research, the new hybrid damper; " tuned liquid column gas damper equipped with variable orifice (H-O-TLCGD)" is introduced and since the dominant mechanism for confronting with vibration in this damper is based on liquid movement and the vibration energy is dissipated by the effects of fluid turbulence and friction caused by the local pressure drop of the orifice opening, The equations governing the dynamic response of the structure equipped with this damper are obtained along with damping modification and removation of some uncertainties, which cause non-linear equations. Also, in this research, according to the advantages of low energy demand, permanent stability of the system and economic efficiency of using semi-active control systems, the combination of semi-active and passive dampers and the increase of stiffness in the systems equipped with them by gas springs, with the aim of improving the performance of system are considered so that the performance level of structures equipped with this new control system improve at an acceptable level. In this research, the differential equations governing the axial performance of the liquid column damper by considering the energy dissipation effects of changes in the flow cross-section in the U-shaped tube, and the effects of the stiffness of the gas spring, are presented separately and how to combine them using hydrodynamics and structural control sciences.
Shiri, Y., Keyvani, J., & Hoseini Lavassani, S. H. (2024). Analytical solution of the closed-form equations governing the hybrid performance of a tuned liquid column gas damper equipped with a variable orifice. Journal of Rehabilitation in Civil Engineering, (), -. doi: 10.22075/jrce.2024.34157.2091
MLA
Yousef Shiri; Jafar Keyvani; Seyed Hossein Hoseini Lavassani. "Analytical solution of the closed-form equations governing the hybrid performance of a tuned liquid column gas damper equipped with a variable orifice", Journal of Rehabilitation in Civil Engineering, , , 2024, -. doi: 10.22075/jrce.2024.34157.2091
HARVARD
Shiri, Y., Keyvani, J., Hoseini Lavassani, S. H. (2024). 'Analytical solution of the closed-form equations governing the hybrid performance of a tuned liquid column gas damper equipped with a variable orifice', Journal of Rehabilitation in Civil Engineering, (), pp. -. doi: 10.22075/jrce.2024.34157.2091
VANCOUVER
Shiri, Y., Keyvani, J., Hoseini Lavassani, S. H. Analytical solution of the closed-form equations governing the hybrid performance of a tuned liquid column gas damper equipped with a variable orifice. Journal of Rehabilitation in Civil Engineering, 2024; (): -. doi: 10.22075/jrce.2024.34157.2091
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