Modification of Classical Hydraulic damper into Semi active damper using MR Approach

Raut, L. B.; Khedkar, Yashpal M.; Salunke, Sharad; Jadhav, Subhash V.

doi:10.29322/ijsrp.9.03.2019.p8795

Cited by 2 publications

(1 citation statement)

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“…In the construction industry, the effectiveness of installing semiactive hydraulic dampers along the diagonal direction of the rectangular frame of a main structure has been verifed to reduce the damage to buildings and bridges caused by earthquakes [14][15][16]. In addition, magnetorheological (MR) dampers, which use a magnetic feld, have been developed to improve the performance of cylinder-type hydraulic dampers, and several research results have been published [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Development of an Impact Energy Absorption Structure by an Arc Shape Stroke Origami Type Hydraulic Damper

Guan,

Yao,

Zhao

et al. 2023

Shock and Vibration

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Cylindrical hydraulic dampers used to reduce impacts and vibrations typically have linear strokes. In this study, a new arc-shaped stroke-type origami hydraulic damper with a nonlinear damping performance was proposed. By examining the damping effect of the origami hydraulic damper, the damping force was found to be proportional to the square of the motion velocity. A nonlinear dynamics governing equation was established using the derived formula for the damping force of the origami hydraulic damper, and a numerical analysis using the Runge–Kutta method was established. An impact test device with an arc-shaped stroke was developed, and the error between the numerical analysis value of the impact displacement and the measured experimental value was confirmed to be sufficiently small. An impact verification experiment confirmed that the damping effect of the origami hydraulic damper increases with the input energy of the impact. By varying the diameter of the orifice hole, which is an important design factor for an origami hydraulic damper, the damping effect of the origami hydraulic damper was found to increase as the diameter of the orifice hole decreased. To examine the effect of the type of hydraulic oil inside the origami hydraulic damper, water and edible oil were used to conduct impact verification experiments, and it was found that the effect on the impact damping effect was relatively small.

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Section: Introductionmentioning

confidence: 99%

Development of an Impact Energy Absorption Structure by an Arc Shape Stroke Origami Type Hydraulic Damper

Guan,

Yao,

Zhao

et al. 2023

Shock and Vibration

View full text Add to dashboard Cite

show abstract

Study on Hydraulic Dampers Using a Foldable Inverted Spiral Origami Structure

Guan

Zuo

Wang³

et al. 2022

Vibration

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Hydraulic dampers for the vibration damping of industrial machinery and building structures are typically cylindrical. This study proposes a novel, axially free-folding hydraulic damper of the origami type to improve the structural characteristics of the conventional cylinder shape with restricted effective stroke in relation to the overall length. First, the basic design equation of the proposed origami hydraulic damper was derived by demonstrating that the fold line cylinders on the sidewalls will always meet the foldable condition of the origami hydraulic damper, that is, α=π/n and π/2n≤β≤π/n. Next, the fluid flow characteristics inside the origami hydraulic damper and in the flow path were analyzed; it was determined that the actual damping force exerted on the origami damper was proportional to the square of the velocity of motion. Equations of motion were developed considering the derived damping force equation, and a vibration analysis method using the Range–Kutta numerical analysis technique was established. A validation test system with an origami hydraulic damper in a mass-spring vibration system was developed, and vibration tests were performed with actual seismic waves to verify the damping characteristics and effectiveness of the origami hydraulic damper. Furthermore, the orifice hole diameter at the end of the origami structure as well as the type of internal fluid, were varied in the vibration tests. The effect of the main components of the origami hydraulic damper on the damping effect was analyzed, revealing that the orifice hole diameter had a more significant effect than the internal fluid.

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Modification of Classical Hydraulic damper into Semi active damper using MR Approach

Cited by 2 publications

References 0 publications

Development of an Impact Energy Absorption Structure by an Arc Shape Stroke Origami Type Hydraulic Damper

Development of an Impact Energy Absorption Structure by an Arc Shape Stroke Origami Type Hydraulic Damper

Study on Hydraulic Dampers Using a Foldable Inverted Spiral Origami Structure

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