Delayed resonator for complete vibration suppression of primary structures with nonlinear stiffness

International Journal of Non-Linear Mechanics, Journal Year: 2024, Volume and Issue: 161, P. 104689 - 104689

Published: March 2, 2024

Language: Английский

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Analysis and experiment of a multi-tile magnetic spring with high negative stiffness

Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 223, P. 111914 - 111914

Published: Sept. 11, 2024

Language: Английский

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An adjustable stiffness vibration isolator implemented by a semicircular ring

Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 222, P. 111797 - 111797

Published: Aug. 2, 2024

Language: Английский

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Design and Test of a Quasi-Zero Stiffness Metastructure Based on the Preshaped Beams for Low-Frequency Vibration Isolation

Published: Jan. 1, 2025

The present study introduces a novel QZS metastructure, which is based on monolithic preshaped beams that draw inspiration from the snap-through behavior of cosine beams. feature achieved by incorporating an additional arc segment, serves as elastic boundary, extending end beam to rigid walls. matching mechanism between segment and cosine-shaped analyzed through static mechanical parametric analysis using finite element method, while metastructures fabricated 3D printing techniques are employed experimentally validate conceptual design. relationships features design parameters established conducted. A isolator consisting designed, its dynamic performances verified experimental tests analytical model. demonstrated 70% reduction in peak transmissibility 25% lower beginning frequency vibration compared nonlinear lacking feature, highlighting advantageous low-frequency isolation capability isolator. Moreover, proposed metastructure demonstrates programmable adjusting number units This enables multi-step isolation, has been validated.

Language: Английский

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Vibration Mitigation in the Transport of Fruit Boxes Using 3D-Printed Devices

Agriculture, Journal Year: 2025, Volume and Issue: 15(2), P. 131 - 131

Published: Jan. 9, 2025

The transport of freshly post-harvested fruit to its collection point is mainly achieved using trailers over uneven terrain, which generates impacts and vibrations that negatively affect the quality fruit. Although some solutions mitigate these effects have been proposed in previous studies, none them are applied directly source problem, i.e., boxes. In this context, metamaterial sheets inspired by design quasi-zero stiffness isolators (QZSs) open up possibility exploring ways vibration isolation thanks their associated nonlinear characteristics. work, ABS with different internal geometries were manufactured compared as possible bottoms Vibration reduction not only protects physical integrity fruit, avoiding visible damage such bumps or bruises, but also preserves chemical properties, texture freshness, shelf life presentation for sale. variables analyzed included number ribs, thickness angle inclination. specimens, behavior impact-type forces experimental dynamic studied an electromagnetic shaker against a sinusoidal signal uniaxial recorded at base trailer real rural route. results showed specimens rib 30° 0.4 mm best impact performance higher amplification transmissibility steady state. presence on route, percentages between 13% 19% obtained principal acceleration impact.

Language: Английский

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Effects of series sequence on the nonlinear dynamic responses of integrated quasi-zero stiffness isolators

Nonlinear Dynamics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Language: Английский

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A multiple layer enhanced quasi-zero stiffness vibration isolator with magnetically modulated nonlinear stiffness

Aerospace Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 110113 - 110113

Published: March 1, 2025

Language: Английский

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Research on Quasi-Zero Stiffness Vibration Isolation System of Buckled Flexural Leaf Spring Structure for Double Crystal Monochromator

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(6), P. 3024 - 3024

Published: March 11, 2025

The double crystal monochromator (DCM) is a spectrometer in synchrotron radiation beamlines, and its stability directly impacts the quality of emitted light. In order to meet requirements fourth generation light sources, researchers have designed DCM using an active control method ensure by actively compensating for displacement through voice coil motors. imposes high demands on vibration isolation performance frame. response external excitation characteristics, this paper proposes quasi-zero stiffness (QZS) system based compressed buckling beam structure. Random simulations finite element analysis revealed that, under different operating conditions, 3σ core part maintained at nanometer level. Moreover, presents calculation elastic potential energy establish force equilibrium equations negative analyzes stress distribution during derived deflection curve. Validation confirms method’s accuracy calculating distribution. Because structural similarities, some results can be applied study honeycomb materials.

Language: Английский

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Zero-stiffness in rolling-lobe air springs for passive, load adaptable and low-frequency vibration isolation

Journal of Sound and Vibration, Journal Year: 2025, Volume and Issue: unknown, P. 119061 - 119061

Published: March 1, 2025

Language: Английский

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Design and test of a quasi-zero stiffness metastructure based on the preshaped beams for low-frequency vibration isolation

Materials & Design, Journal Year: 2025, Volume and Issue: unknown, P. 113853 - 113853

Published: March 1, 2025

Language: Английский

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