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    Nonlinear Damping Amplifier Friction Bearings

    Source: Journal of Vibration and Acoustics:;2025:;volume( 147 ):;issue: 003::page 34501-1
    Author:
    Chowdhury, Sudip
    ,
    Adhikari, Sondipon
    DOI: 10.1115/1.4067800
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This article introduces damping amplifiers integrated into the core material of conventional nonlinear friction base isolators to improve their vibration attenuation capabilities and mitigate their shortcomings. Four new types of damping amplifier friction bearings are introduced: levered, nested, compound, and damping. The H2 optimization strategy is utilized to obtain the closed-form analytical solution for the optimized designed parameters. The analytical investigation confirms the efficiency of the recently obtained closed-form equations for the optimal design parameters. The frequency response function was used to develop closed-form formulas for the isolator and main structure’s dynamic responses. The harmonic and random white noise excitation served as the basis. Furthermore, numerical analysis by considering real earthquake load has confirmed the novel isolators’ efficiency. The vibration reduction capacities of the H2 optimized damping amplifier friction bearings, compound damping amplifier friction bearings, nested damping amplifier friction bearings, and levered damping amplifier friction bearings are 76.1% superior to the optimum conventional base isolator. These findings demonstrate how the proposed designs may improve structural resistance to dynamic loads.
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      Nonlinear Damping Amplifier Friction Bearings

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    contributor authorChowdhury, Sudip
    contributor authorAdhikari, Sondipon
    date accessioned2025-04-21T10:28:36Z
    date available2025-04-21T10:28:36Z
    date copyright2/14/2025 12:00:00 AM
    date issued2025
    identifier issn1048-9002
    identifier othervib-24-1246.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306275
    description abstractThis article introduces damping amplifiers integrated into the core material of conventional nonlinear friction base isolators to improve their vibration attenuation capabilities and mitigate their shortcomings. Four new types of damping amplifier friction bearings are introduced: levered, nested, compound, and damping. The H2 optimization strategy is utilized to obtain the closed-form analytical solution for the optimized designed parameters. The analytical investigation confirms the efficiency of the recently obtained closed-form equations for the optimal design parameters. The frequency response function was used to develop closed-form formulas for the isolator and main structure’s dynamic responses. The harmonic and random white noise excitation served as the basis. Furthermore, numerical analysis by considering real earthquake load has confirmed the novel isolators’ efficiency. The vibration reduction capacities of the H2 optimized damping amplifier friction bearings, compound damping amplifier friction bearings, nested damping amplifier friction bearings, and levered damping amplifier friction bearings are 76.1% superior to the optimum conventional base isolator. These findings demonstrate how the proposed designs may improve structural resistance to dynamic loads.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNonlinear Damping Amplifier Friction Bearings
    typeJournal Paper
    journal volume147
    journal issue3
    journal titleJournal of Vibration and Acoustics
    identifier doi10.1115/1.4067800
    journal fristpage34501-1
    journal lastpage34501-10
    page10
    treeJournal of Vibration and Acoustics:;2025:;volume( 147 ):;issue: 003
    contenttypeFulltext
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