Current Trends in Fluid Viscous Dampers with Semi-Active and Adaptive Behavior

Zoccolini, Luca; Bruschi, Eleonora; Cattaneo, Sara; Quaglini, Virginio

doi:10.3390/app131810358

Cited by 11 publications

(7 citation statements)

References 153 publications

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“…properties. This adaptability enhances their ability to mitigate vibrations across various earthquake intensities [10]. By integrating dampers into the structural design using mathematical models, engineers can significantly improve a building's ability to absorb and dissipate energy during earthquakes.…”

Section: Of 17mentioning

confidence: 99%

Time-Optimal Motions of Mechanical System with Viscous Friction

Kamzolkin,

Ternovski

2024

Preprint

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Optimal control is a critical tool for mechanical robotic systems, facilitating precise manipulation of dynamic processes. These processes are described through differential equations governed by a control function, addressing a time-optimal problem with bilinear characteristics. Our study utilizes the classical approach complemented by Pontryagin's Maximum Principle (PMP) to explore this inverse optimal problem. The objective is to develop an exact piecewise control function that effectively manages trajectory control while considering the effects of viscous friction. Our simulations demonstrate that the proposed control law markedly diminishes oscillations induced by boundary conditions. This research not only aims to delineate the reachability set but also strives to determine the minimal time required for the process. The findings include an exact analytical solution for the stated control problem.

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Section: Of 17mentioning

confidence: 99%

Time-Optimal Motions of Mechanical System with Viscous Friction

Kamzolkin,

Ternovski

2024

Preprint

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“…These dampers are increasingly sophisticated, incorporating technologies like electrorheological and magnetorheological fluids, which allow for variable stiffness and damping properties. This adaptability enhances their ability to mitigate vibrations across various earthquake intensities [10]. By integrating dampers into the structural design using mathematical models, engineers can significantly improve a building's ability to absorb and dissipate energy during earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Time-Optimal Motions of a Mechanical System with Viscous Friction

Kamzolkin,

Ternovski

2024

Mathematics

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Optimal control is a critical tool for mechanical robotic systems, facilitating the precise manipulation of dynamic processes. These processes are described through differential equations governed by a control function, addressing a time-optimal problem with bilinear characteristics. Our study utilizes the classical approach complemented by Pontryagin’s Maximum Principle (PMP) to explore this inverse optimal problem. The objective is to develop an exact piecewise control function that effectively manages trajectory control while considering the effects of viscous friction. Our simulations demonstrate that the proposed control law markedly diminishes oscillations induced by boundary conditions. This research not only aims to delineate the reachability set but also strives to determine the minimal time required for the process. The findings include an exact analytical solution for the stated control problem.

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“…They can also be categorized as rate-dependent or rate-independent dampers based on their dependence on velocity [5,6]. Viscous dampers [7][8][9] are the most commonly used velocitybased dissipative devices that utilize the damping characteristics of viscous materials to reduce structural vibration response. They generate a damping force when subjected to external forces, which can absorb and dissipate energy.…”

Section: Introductionmentioning

confidence: 99%

Study on the Damping Efficiency of a Structure with Additional Viscous Dampers Based on the Shaking Table Test

Lan,

Zhang,

Sun

et al. 2024

Buildings

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This study specifically focuses on the damping efficiency of a damped structure with additional viscous dampers. A two-layer steel frame structure with eight sets of viscous dampers is used to conduct a series of seismic simulation shaking table tests, including a non-damped structure without dampers and two damped structures with dampers placed at 1/2 and 1/6 of the beam span, respectively. By conducting these tests, the energy dissipation, force, and displacement of the damper, as well as the parameters of the structure such as floor displacement and acceleration, are obtained. The main damping efficiency indicators of the damped structure are calculated, including the additional damping ratio, inter-story displacement utilization rate, as well as the reduction rate of the vertex displacement and the base shear relative to the non-damped structure. The study shows that the viscous dampers exhibit full hysteresis loops and a strong energy dissipation capacity in the structure. The seismic response of the vertex displacement and base shear in the damped structure is significantly smaller than that in the non-damped structure. Under different seismic levels, including frequent earthquakes, occasional earthquakes, and rare earthquakes, the damping effect of the dampers placed at 1/2 of the beam span is significantly better than that placed at 1/6 of the beam span. For example, the additional damping ratio for the X-direction artificial wave REN is 19% and 11%, 20% and 13%, and 13% and 11%, respectively. The patterns for inter-story displacement utilization ratio, reduction rate of the vertex displacement, and reduction rate of the base shear are similar. The research findings strongly indicate that the damped structure with additional viscous dampers exhibits excellent damping efficiency. In future damping design, designers need to fully consider the placement of viscous dampers within the beam span.

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Current Trends in Fluid Viscous Dampers with Semi-Active and Adaptive Behavior

Cited by 11 publications

References 153 publications

Time-Optimal Motions of Mechanical System with Viscous Friction

Time-Optimal Motions of Mechanical System with Viscous Friction

Time-Optimal Motions of a Mechanical System with Viscous Friction

Study on the Damping Efficiency of a Structure with Additional Viscous Dampers Based on the Shaking Table Test

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