Influence of shock impulse characteristics on vibration control using nonlinear fluid viscous dampers

Narkhede, D. I.; Sinha, Ravi

doi:10.1177/1077546315594062

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…Fluid particles from oblique fluidic actuators are directed into the base fluidic actuator, and an inverse restoring force is induced as a result of fluid particle reverse forcing as briefed in Narkhede et al (2017), because the oblique fluidic actuators are pivoted to oscillate around the side wall member in response to piston displacement by applied force and load-base displacement. The effect of force on the load base urges the upper portion of the composite slab in downward direction, and due to the pivoted joints at the ends of oblique fluidic actuators, piston rods extends and then the fluid in the piston side of the fluidic actuator pushes out and directs to the cover of the base fluidic actuator.…”

Section: Nonlinear Vibration Isolator With Fluidic Actuators and Comp...mentioning

confidence: 99%

Vibration control of an unbalanced system using a quasi-zero stiffness vibration isolator with fluidic actuators and composite material: An experimental study

Solaiachari

Lakshmipathy

2022

Journal of Vibration and Control

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In this study, a new type of vibration isolator based on fluidic actuators and a composite slab was tested experimentally with an unbalanced disturbance. Quasi-zero stiffness vibration isolation techniques are advanced and provide effective isolation performance for non-nominal loads. The isolation performance of the proposed isolator was compared to that of a nonlinear vibration isolator equipped with fluidic actuators and a mechanical coil spring (NLVIFA). The NLVIFA system is better suited to non-nominal loads; however, the mechanical spring axial deflection leads to limited amplitude reduction in the system. To address this issue, a cross buckled slab was developed to replace a mechanical coil spring for absorbing vertical deflection by transverse bending, which is made of a specially developed composite material of Basalt fiber reinforced with epoxy resin and enhanced with graphene nano pellets. This current study was concerned with the theoretical analysis and experimental investigations of the proposed nonlinear vibration isolator with fluidic actuators and composite material (NLVIFA-CM), which performs under quasi-zero stiffness characteristics. Because of its reduced axial deflection, the theoretical and experimental results show that the NLVIFA-CM system outperforms the NLVIFA system and other linear type vibration isolators in terms of isolation performance. Furthermore, the proposed vibration isolator makes a significant contribution to low-frequency vibration.

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Section: Nonlinear Vibration Isolator With Fluidic Actuators and Comp...mentioning

confidence: 99%

Vibration control of an unbalanced system using a quasi-zero stiffness vibration isolator with fluidic actuators and composite material: An experimental study

Solaiachari

Lakshmipathy

2022

Journal of Vibration and Control

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“…The dissipation of energy in the form of cracks leads to the failure of structure during such events, the dissipation of energy by dampers provides ease in damages by such events [20]. The change in damper position improves performance and seismic response of structure [21][22][23]. When non-structural damages happen during earthquakes, in uences economic losses, retro tting such buildings with viscous dampers have shown to reduce storey displacement and inter storey drifts, resulting in reduction of repair cost [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Seismic response control of RCC building with plan and vertical irregularities using dampers

Sanghai,

Gurmule

2023

J Build Rehabil

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Earthquakes can be devastating for cities due to mid and high-rise buildings, as these structures are vulnerable to shaking due to earthquake forces. The effects of earthquake magnify when buildings are constructed with plan or elevational irregularities. To address this issue, in this study, building models with plan and vertical irregularities are analyzed using nonlinear time history analysis. Further, uid viscous dampers are designed for both types of buildings using Performance based methodology. The response of buildings during seismic events for all models with plan and vertical irregularities is checked with and without dampers. The storey displacements, base shear, element forces and energy dissipation of dampers is compared for the various time history earthquake records. It was observed that, the design of uid viscous damper changes drastically when irregularities comes into picture. Also, an increase in base shear, axial force values while decrease in storey displacement, shear forces, bending moment values was observed due to inclusion of dampers. It is found that the dampers in structures are effective in resisting earthquake forces.

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“…He et al (2022), Mller et al (2019), and Chen et al (2020) respectively investigated the performance of viscous dampers used for vibration control of buildings, bridges, and cables. The effect of viscous dampers on mitigating structural responses caused by earthquakes (Guo et al, 2021), wind (Sun et al, 2021), vehicle loads (Yu et al, 2018), and shock loadings (Narkhede and Sinha, 2017) have also been extensively studied by scholars. All the above-mentioned researches verified the effectiveness of viscous dampers.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of the combined viscous-steel damping system suffering from oil leakage

Yang

et al. 2022

Journal of Vibration and Control

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The combined viscous-steel damping system is a passive energy dissipation device consisting of a fluid viscous damper and a steel yielding damper in series. However, many viscous dampers installed in structures have been suffering from severe oil leakage. This study aims to assess the influence of the leaked viscous damper on the seismic performance of the combined system. Cyclic tests were conducted on the viscous damper with different leakage levels to obtain its degraded hysteretic performance. The modeling method of the leaked viscous damper was proposed according to the experimental result. The locking behavior and seismic mitigation effectiveness of the combined system suffering from oil leakage were investigated based on a single-degree-of-freedom system. The result reveals that ( i) The leaked viscous damper cannot generate damping force at the beginning of the reverse movement of its piston, which is reflected in the hysteretic curves as a “gap” phenomenon. ( ii) The proposed modeling method can accurately simulate the damping characteristics of the leaked viscous damper. ( iii) In spite of the leakage severity, the combined system possesses reliable locking behavior and decent vibration mitigation effectiveness under earthquakes. ( iv) The combined system is superior to the viscous damper in mitigating seismic-induced displacement when suffering from oil leakage.

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Influence of shock impulse characteristics on vibration control using nonlinear fluid viscous dampers

Cited by 10 publications

References 16 publications

Vibration control of an unbalanced system using a quasi-zero stiffness vibration isolator with fluidic actuators and composite material: An experimental study

Vibration control of an unbalanced system using a quasi-zero stiffness vibration isolator with fluidic actuators and composite material: An experimental study

Seismic response control of RCC building with plan and vertical irregularities using dampers

Seismic performance of the combined viscous-steel damping system suffering from oil leakage

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