Design of a metastructure for vibration isolation with quasi-zero-stiffness characteristics using bistable curved beam

Dalela, Srajan; Balaji, P. S.; Jena, D.P.

doi:10.1007/s11071-022-07301-0

Cited by 70 publications

(7 citation statements)

References 46 publications

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“…In prior studies, quasi-zero stiffness metastructures were typically constructed by combining positive- and negative-stiffness structures. − These investigations validated that quasi-zero stiffness metastructures possess outstanding vibrational attenuation properties, particularly at low frequencies. Nevertheless, their ability to achieve a zero stiffness range is primarily limited to low preloads, posing challenges in effectively dampening vibrations while simultaneously supporting heavy structures.…”

Section: Introductionmentioning

confidence: 82%

Machine Learning-Driven Design Optimization of Buckling-Induced Quasi-Zero Stiffness Metastructures for Low-Frequency Vibration Isolation

Hong,

Kim,

Kim

et al. 2024

ACS Appl. Mater. Interfaces

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Metastructures, artificial arrangements of micro/ macrostructures, possess unique properties and are of significant interest in aerospace, stealth technology, and various other applications. Recent studies have focused on quasi-zero stiffness metastructures, providing an outstanding vibration isolation capability. However, existing methods are constrained to low preloads and lack the consideration of structural analysis, despite their intended use in practical structures. This study introduces metastructures with quasi-zero stiffness characteristics under high preloads by inducing local buckling. An optimization framework combining deep reinforcement learning and finite-element analysis is employed to derive an optimal model that considers both structural safety and quasi-zero stiffness characteristics. To validate the optimization results, quasi-zero stiffness metastructures are fabricated via 3D printing, and compression and vibration experiments are conducted. The fabricated metastructures exhibit quasizero stiffness characteristics under a high target preload along with outstanding vibration reduction performance, even in the lowfrequency range.

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Section: Introductionmentioning

confidence: 82%

Machine Learning-Driven Design Optimization of Buckling-Induced Quasi-Zero Stiffness Metastructures for Low-Frequency Vibration Isolation

Hong,

Kim,

Kim

et al. 2024

ACS Appl. Mater. Interfaces

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“…It has constant stiffness and damping and can be used for ultra-precision measurement sensors. Dalela et al 14 designed a single DOF vibration isolation system in the vertical direction by adopting the bistable chord beam as the negative stiffness mechanism, instead of the nonlinear diagonal spring. In addition, there are also negative stiffness mechanisms designed in combination with Euler buckling beams, 11,15 air springs, 16,17 bionic structures, [18][19][20] and composite structures, [21][22][23] which greatly increase the types of QZS isolators and make them truly applied to social life.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Wang,

Xin,

et al. 2024

Advances in Mechanical Engineering

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Multi-dimensional vibration isolation platforms often use parallel mechanisms to achieve multi-dimensional vibration isolation control. However, due to the high stiffness of the parallel mechanism, its own natural frequency is high, and it has good performance when applied to high-frequency vibration isolation, but it is hard to achieve low-frequency vibration isolation. This paper aims at the problem that the actual polishing and grinding equipment is often subjected to axial and circumferential low-frequency disturbances during operation, a novel C/2-(2-RRR) RR two-degree-of-freedom (2-DOF) translational-rotation low-frequency vibration isolation platform is proposed based on the singular configuration of planar 2-RRR mechanism. The coupling dynamic model of the vibration isolation platform is established, and the amplitude-frequency curve and force transmissibility curve are analyzed. The simulation analysis and prototype experiment are carried out by using the independent external excitation in both translational and rotational directions, and the corresponding linear system is compared to verify the effectiveness of the low-frequency vibration isolation of the two-degree-of-freedom vibration isolation platform.

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“…Compared with a linear vibration isolation system, the QZS system can overcome the barrier between static and dynamic performance design. The methods to achieve QZS include curved beam systems with snap-through mechanisms [2], linear oblique springs [3], magnet [4] or magnetic springs [5], X-shaped structures to obtain multi-direction isolation [6], and rigidflexible coupled isolation system [7].…”

Section: Introductionmentioning

confidence: 99%

Tunable stiffness design of curved-crease origami and extended quasi-zero stiffness vibration isolator

Zhou,

Tachi,

Cai

et al. 2024

Smart Mater. Struct.

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A kind of origami tube based on the curved crease, which has a tunable stiffness, was designed, fabricated, tested, and extended to the concept of a quasi-zero stiffness vibration isolator. The regulating function of crease stiffness on the overall origami stiffness without changes in the crease pattern was verified by single-crease models. With various opening ratios along the creases, three tubes composed of mirrored single-crease origami were designed, fabricated by 3D printing, and compressively tested. The test results present the potential of the approach of quasi-zero stiffness (QZS). Further, the elastic-frictionless origami tubes were redesigned and simulated to obtain the target stiffness. The cubic term fitting of the load curve was adopted by the harmonic balance method (HBM) to solve the steady-state vibration response, and then the simulation results obtained by the finite element method (FEM) were compared. The study shows that the designed elastic-frictionless isolator has a good low-frequency vibration isolation performance. The concept of the simple stiffness control method of curved-crease origami provides more practice options for high static and low dynamic stiffness systems.

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Design of a metastructure for vibration isolation with quasi-zero-stiffness characteristics using bistable curved beam

Cited by 70 publications

References 46 publications

Machine Learning-Driven Design Optimization of Buckling-Induced Quasi-Zero Stiffness Metastructures for Low-Frequency Vibration Isolation

Machine Learning-Driven Design Optimization of Buckling-Induced Quasi-Zero Stiffness Metastructures for Low-Frequency Vibration Isolation

Design of a novel two-degree-of-freedom translational-rotation low-frequency vibration isolation platform

Tunable stiffness design of curved-crease origami and extended quasi-zero stiffness vibration isolator

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