Quasi-zero stiffness vibration isolators with slender Euler beams as positive stiffness elements

Chao, Tinglong; Xu, Xinhua; Wu, Zhijing; Wen, Shurui; Li, Fengming

doi:10.1080/15376494.2023.2192207

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…Nonlinear isolators, owing to their wider frequency bands and superior isolation efficiency relative to linear isolators, have emerged as a focal point of research [1,2]. Within this class, quasi-zero stiffness (QZS) represents a typical nonlinear vibration isolation feature [2], capable of imparting high-static-low-dynamic-stiffness (HSLDS) properties and furnishing a range of anti-vibration structures such as beams [4,5], cam-roller [6,7], horizontal springs [8][9], and magnets [11][12][13]. Bio-inspired vibration isolators, on the other hand, draw inspiration from natural systems to create effective and efficient solutions for vibration control, including achieving QZS characteristics [14].…”

Section: Introductionmentioning

confidence: 99%

Palm petiole inspired nonlinear anti-vibration ring with deformable crescent-shaped cross-section

Feng,

et al. 2024

Nonlinear Dyn

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This paper presents a novel nonlinear anti-vibration ring with deformable crescent-shaped cross-sections (NAVR-DCCS) inspired by the petiole of palm leaf. The proposed NAVR-DCCS exhibits markedly enhanced nonlinear quasi-zero stiffness through deformable cross-sections, which endow it with advantageous vibration isolation attributes. A comprehensive investigation of the structural nonlinearities and dynamic behaviors of the NAVR-DCCS is undertaken, with emphasis on the principle of cross-sectional deformation and its nonlinear stiffness properties. This study explores the influence of pertinent parameters on the nonlinear characteristics and displacement transmissibility. Tensile-compression testing and transmissibility measurements are conducted to verify theoretical calculations, and the experimental results are found to be in congruity with theoretical predictions. The beneficial nonlinear characteristics of the NAVR-DCCS hold promise for providing a passive vibration isolation methodology, representing a potentially innovative solution with broad-reaching applicability and utility across diverse research domains.

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Section: Introductionmentioning

confidence: 99%

Palm petiole inspired nonlinear anti-vibration ring with deformable crescent-shaped cross-section

Feng,

et al. 2024

Nonlinear Dyn

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“…Huang et al 21,22 used two pairs of buckling beams as negative stiffness structures to improve the stability of the system. Chao et al 23 proposed a quasi‐zero‐stiffness isolator with a slender beam as a positive stiffness element. Kim et al 24 applied this QZS isolator to precision and ultra‐precision measurement systems.…”

Section: Introductionmentioning

confidence: 99%

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Wang,

Hou,

Meng

et al. 2024

Int Journal of Mech Sys Dyn

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A three‐magnet‐ring quasi‐zero stiffness (QZS‐TMR) isolator is designed to solve the problem of low‐frequency vibration isolation in the vertical direction of precision equipment. QZS‐TMR has both positive and negative stiffness structures. The positive stiffness structure consists of two mutually repelling magnetic rings and the negative stiffness structure consists of two magnetic rings nested within each other. By modulating the relative distance between positive and negative stiffness structures, the isolator can have QZS characteristics. Compared with other QZS isolators, the QZS‐TMR is compact and easy to manufacture. In addition, the working load of QZS‐TMR can be flexibly adjusted by varying the radial widths of the inner magnetic ring. In this paper, the static analysis of QZS‐TMR is carried out to guide the design, and the low‐frequency vibration isolation performance is studied. In addition, the experimental prototype of QZS‐TMR is designed and manufactured. The static and vibration isolation experiments are carried out on the prototype. The results show that the initial vibration isolation frequency of the experimental prototype is about 4 Hz. The results show an excellent low‐frequency vibration isolation effect, which is consistent with the theoretical research. This paper introduces a new approach to the design of the QZS isolator.

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“…The methods to achieve QZS characteristic has been a prominent research area among scholars. Most of them consist of positive stiffness unit in parallel with negative stiffness unit, such as: mechanical springs [4,5], pre-flexed beams [6,7], electromagnetic springs [8], bionic structures [9], geometric nonlinearities [10], composite structures [11], and the other types. Mechanical springs mechanism was the first proposed QZS structure.…”

Section: Introductionmentioning

confidence: 99%

Design of a Dual-arched Structure for Low-frequency Vibration Isolation with Enhanced Quasi-Zero-Stiffness Characteristics

Feng,

Guo,

Feng

et al. 2023

Preprint

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This paper proposes a dual-arched nonlinear anti-vibration structure (D-ANAVS) and systematically investigates its nonlinear characteristics to assess its vibration suppression performance. The D-ANAVS consists of a dual arrangement of arch-shaped arcs, which demonstrates a distinctive characteristic characterized by the combination of linear and geometric nonlinear stiffness during the compression. This distinctive attribute distinguishes the D-ANAVS from other structures, endowing it with an extended quasi-zero stiffness range in displacement and greatly enhancing its performance in effectively suppressing vibrations. A lumped parameter model of the D-ANAVS is introduced to comprehensively analyze its static and dynamic behaviors. The investigation specifically focuses on examining the influence of various structural parameters on the observed nonlinearities. A prototype is meticulously designed and fabricated using thermoplastic polyurethane (TPU) material. Experimental tests are conducted to assess its efficacy in suppressing vibrations. The obtained results unequivocally demonstrate the remarkable capability of the D-ANAVS to significantly attenuate vibrations within the low-frequency range. The results obtained from this study offer compelling empirical evidence that substantiates the effectiveness of the D-ANAVS as a robust vibration suppression solution applicable to a wide range of engineering applications.

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Quasi-zero stiffness vibration isolators with slender Euler beams as positive stiffness elements

Cited by 8 publications

References 36 publications

Palm petiole inspired nonlinear anti-vibration ring with deformable crescent-shaped cross-section

Palm petiole inspired nonlinear anti-vibration ring with deformable crescent-shaped cross-section

Three‐magnet‐ring quasi‐zero stiffness isolator for low‐frequency vibration isolation

Design of a Dual-arched Structure for Low-frequency Vibration Isolation with Enhanced Quasi-Zero-Stiffness Characteristics

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