A variable positive-negative stiffness joint with low frequency vibration isolation performance

Chen, Renzhen; Li, Xiaopeng; Yang, Zhou; Xu, Jinchi; Yang, Hui

doi:10.1016/j.measurement.2021.110046

Cited by 19 publications

(3 citation statements)

References 48 publications

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“…However, the isolation frequency band is narrow and concentrated, and it cannot be solved by this technique alone for the broadband vibration isolation problem. Many scholars have adopted negative stiffness structural vibration isolation systems (Chen et al, 2021;Le and Ahn, 2013). In addition, some researchers adopt the idea of combining active and passive, relying on the passive vibration isolator of the 6-DOF vibration isolation platform (Qian et al, 2018) to isolate highfrequency vibration, while the low-frequency vibration is isolated by active control or semi-active control.…”

Section: Introductionmentioning

confidence: 99%

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Optimization design of a two-stage multidirectional vibration isolation system for large airborne equipment

Zhu,

Wu,

et al. 2023

MMMS

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Purpose Improvement and optimization design of a two-stage vibration isolation system proposed in this paper are conducted to ensure the device of electronic work effective.Design/methodology/approach The proposed two-stage vibration isolation system of airborne equipment is optimized and parameterized based on multi-objective genetic algorithm.Findings The results show that compared with initial two-stage vibration isolation system, the angular vibration of the two-stage vibration isolation system becomes 3.55 × 10-4 rad, which decreases by 89%. The linear isolation effect is improved by at least 67.7%.Originality/value The optimized two-stage vibration isolation system effectively improves the vibration reduction effect, the resonance peak is obviously improved and the reliability of the mounting bracket and the shock absorber is highly improved, which provides an analysis method for two-stage airborne equipment isolation design under complex dynamic environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization design of a two-stage multidirectional vibration isolation system for large airborne equipment

Zhu,

Wu,

et al. 2023

MMMS

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“…The specific nonlinear behaviors relying on the buckling instability motivated numerous fundamentals studies, as [11] followed by [12,13]. Most of these studies focus on the mathematical way to obtain low dynamic stiffness [14,15], and some show experimental results on prototypes for various industrial applications as [16] or as [17,18] to improve the comfort seat suspension of the vehicle. The performance of more recent systems is demonstrated experimentally under harmonic and random conditions [19].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Bending Model Describing the Generation of Negative Stiffness by Buckled Beams: Qualitative Analysis and Experimental Verification

Fossat,

Kothakota,

Ichchou

et al. 2023

Applied Sciences

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This work addresses the dynamic modeling of a negative stiffness absorber consisting of an assembly of curved beams. Design rules are derived from the orders of magnitude of stiffness and elastic energy stored by the negative stiffness elements. Although static and dynamic performances are widely documented using equivalent spring–mass system equations of motion, this paper presents a modeling approach based on beam dynamics to predict the behavior by incorporating the generation of negative stiffness with prestressed Euler beams. The static behavior is first recalled to feed the dynamic beam model with realistic orders of magnitude. The latter is derived from the beam balance instead of the spring–mass system and aims at solving the beam problem, which encompasses more realistic phenomena compared to introducing the equivalent stiffness in the spring–mass equation of motion. The consistency of the beam modeling is confirmed by comparison with available models in the literature and finite element simulations. A mock-up is built in which beam-type components are 3D-printed. Axial loading is introduced on the curved beams to evaluate its influence on the response of the isolator, and the observed softening trend complies with the theoretical predictions.

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An active high-static-low-dynamic-stiffness vibration isolator with adjustable buckling beams: theory and experiment

Xu,

Niu,

Zhang

et al. 2024

Appl. Math. Mech.-Engl. Ed.

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A variable positive-negative stiffness joint with low frequency vibration isolation performance

Cited by 19 publications

References 48 publications

Optimization design of a two-stage multidirectional vibration isolation system for large airborne equipment

Optimization design of a two-stage multidirectional vibration isolation system for large airborne equipment

Dynamic Bending Model Describing the Generation of Negative Stiffness by Buckled Beams: Qualitative Analysis and Experimental Verification

An active high-static-low-dynamic-stiffness vibration isolator with adjustable buckling beams: theory and experiment

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