Enhancing sound insulation performance with active constrained layer damping plates at low frequencies

Min, Hequn; Wang, Bo

doi:10.1016/j.apacoust.2024.110062

Applied Acoustics

2024

DOI: 10.1016/j.apacoust.2024.110062

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Enhancing sound insulation performance with active constrained layer damping plates at low frequencies

Hequn Min,

Bo Wang

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2024

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Cited by 3 publications

References 28 publications

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Innovative Vibration Control of Triply Periodic Minimum Surfaces Lattice Structures: A Hybrid Approach with Constrained Layer Damping Silicone–Viscoelastic Layer Integration

Ozden,

Simsek,

Ozdemir

et al. 2024

Adv Eng Mater

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This article introduces a novel method to enhance the damping performance of triply periodic minimal surface (TPMS) structures by integrating metamaterials with constrained layer damping (CLD) applications. This objective is accomplished by combining a viscoelastic silicone polymer layer with a primitive TPMS structure fabricated through laser powder bed fusion using aluminum alloy powder. Finite‐element method (FEM) models using voxel elements, due to their high accuracy and computational efficiency, are developed to analyze the damping behavior of the TPMS‐based CLD structure across various frequencies. Experimental modal test results validate the FEM model with high accuracy. Two distinct damping characterization methods, both time‐domain and frequency‐based, are employed to quantify the damping performance. The results reveal a fivefold improvement in damping performance in the time domain compared to the metal TPMS structure. In the frequency domain, the structure demonstrates 76% lower cumulative vibration compared to the metallic reference using the integral of frequency response method.

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Innovative Vibration Control of Triply Periodic Minimum Surfaces Lattice Structures: A Hybrid Approach with Constrained Layer Damping Silicone–Viscoelastic Layer Integration

Ozden,

Simsek,

Ozdemir

et al. 2024

Adv Eng Mater

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Preparation and characterization of waste cotton fabric reinforced polylactic acid green composites with multifunctional properties in a low-carbon process

Chen,

Shi,

Dan

et al. 2024

Process Safety and Environmental Protection

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Effect of base slab mass and number of rubber layers on base isolation system performance in enhancing building dynamic response

Abid,

El Janous,

El Ghoulbzouri

2024

WJE

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Purpose Traditional designs might not withstand earthquake forces adequately, potentially leading to structural damage. This paper aims to examine the impact of varying the base slab mass and the number of rubber layers in isolators on the performance of isolation systems to improve the seismic performance of buildings. Design/methodology/approach The isolated structure is modeled as a two-degree of freedom system, and its corresponding equation of motion is established. Displacement expressions for the base slab and roof are derived using the mode superposition method. Findings A base isolation system improves the buildings’ behavior, particularly when higher rubber layer numbers and a heavier base slab are assumed. At an excitation frequency of 8 rad/s, an increase in the rubber layer numbers from 9 to 11 led to a 30% reduction in relative displacement. At an excitation frequency of 6 rad/s, a 40% reduction in relative displacement was observed passing from a base slab mass (mb) of 7.5 tons with damping ratios of 12% and 10% in the first and second modes to a mass (mb) of 30 tons with lower damping ratios of 9.5% and 4.2%. Originality/value The high damping ratio in the isolation mode significantly increases the damping ratio of the fixed-base building. However, higher damping ratios in the first and second modes do not necessarily lead to better seismic performance. Besides, an increase in the base slab mass and the number of rubber layers enhances the dynamic response of the isolated structure by shifting its fundamental frequency away from the excitation frequency.

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Enhancing sound insulation performance with active constrained layer damping plates at low frequencies

Cited by 3 publications

References 28 publications

Innovative Vibration Control of Triply Periodic Minimum Surfaces Lattice Structures: A Hybrid Approach with Constrained Layer Damping Silicone–Viscoelastic Layer Integration

Innovative Vibration Control of Triply Periodic Minimum Surfaces Lattice Structures: A Hybrid Approach with Constrained Layer Damping Silicone–Viscoelastic Layer Integration

Preparation and characterization of waste cotton fabric reinforced polylactic acid green composites with multifunctional properties in a low-carbon process

Effect of base slab mass and number of rubber layers on base isolation system performance in enhancing building dynamic response

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