Design and Analysis of a High-Static-Low-Dynamic Stiffness Isolator Using the Cam-Roller-Spring Mechanism

Yao, Yu-Hui; Wang, Xiaojian; Li, Hongguang

doi:10.1115/1.4045583

Cited by 20 publications

(5 citation statements)

References 28 publications

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“…This approach sidesteps the approximation errors inherent in theoretical design based solely on Taylor expansions and assumptions neglecting friction. Yuhui Yao [48] introduced a novel design for a high-static, low-dynamic-stiffness (HSLDS) isolator featuring an adjustable cam profile. This isolator utilizes the interaction force between the cam and roller to provide negative stiffness, while a linear spring contributes positive stiffness within the HSLDS system.…”

Section: Cam-roller As Negative Stiffness Mechanismmentioning

confidence: 99%

Magnetic Negative Stiffness Devices for Vibration Isolation Systems: A State-of-the-Art Review from Theoretical Models to Engineering Applications

Zhu,

Chai

2024

Applied Sciences

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This paper presents a comprehensive state-of-the-art review of magnetic negative stiffness (MNS) devices in the realm of vibration isolation systems, spanning from foundational theoretical models to practical engineering applications. The emergence of MNS technology represents a significant advancement in the field of vibration isolation, introducing a method capable of achieving near-zero stiffness to effectively attenuate low-frequency vibration. Through a systematic exploration of the evolution of vibration isolation methodologies—encompassing passive, active, and hybrid techniques—this article elucidates the underlying principles of quasi-zero stiffness (QZS) and investigates various configurations of MNS isolators, such as the linear spring, bending beam, level spring-link, and cam-roller designs. Our comprehensive analysis extends to the optimization and application of these isolators across diverse engineering domains, highlighting their pivotal role in enhancing the isolation efficiency against low-frequency vibrations. By integrating experimental validations with theoretical insights, this study underscores the transformative potential of MNS devices in redefining vibration isolation capabilities, particularly in expanding the isolation frequency band while preserving the load-bearing capacities. As the authors of this review, not only are the current advancements within MNS device research cataloged but also future trajectories are projected, advocating for continued innovation and tailored designs to fully exploit the advantages of MNS technology in specialized vibration isolation scenarios.

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Section: Cam-roller As Negative Stiffness Mechanismmentioning

confidence: 99%

Magnetic Negative Stiffness Devices for Vibration Isolation Systems: A State-of-the-Art Review from Theoretical Models to Engineering Applications

Zhu,

Chai

2024

Applied Sciences

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“…According to Eqs. (28) and (31), the stiffness can be decomposed into two parts, i.e., horizontal stiffness and oblique stiffness. Transforming horizontal stiffness Eq.…”

Section: Negative Stiffness Mechanismmentioning

confidence: 99%

“…The fairly typical case is the cam mechanism. Li et al designed and fabricated two different HSLDS vibration isolators with a cam-roller-spring mechanism [27,28] to test the isolation performance in the lowfrequency range. Inspired by the bird limb skeleton, Jing proposed a series of HSLDS vibration isolation systems based on nonlinear scissor-like structured platforms and combined the parallel mechanism to expand the vibration signal to multidimensional vibration isolation platforms [29,30,31,32].…”

Section: Introductionmentioning

confidence: 99%

Design and Characteristics of a Novel QZS Vibration Isolation System with Origami-inspired Corrector

Liu

Peng

Jin

2021

Preprint

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A new class of quasi-zero-stiffness (QZS) vibration isolation systems, inspired by the origami metamaterial, is proposed to achieve high-performance vibration suppression in this paper. According to the mechanical characteristics of Tachi-Miura origami (TMO) with single degree-of-freedom, the nonlinear geometric relationship is developed with the folding angle as the master variable. By utilizing equivalent transformation and virtual work principle, the static model is established, the influence of structural parameters on stiffness is investigated, and the negative stiffness mechanism of origami mechanism is revealed. By adding a linear spring with positive stiffness to the origami in parallel, the Tachi-Miura origami vibration isolator (TMOriVi) is obtained. Subsequently, the governing equation is presented by means of the harmonic balance method. Two types of instability situations, jump phenomenon and unbounded response, are studied, and their analytic criteria and relationship are derived. Finally, through the parametric influence analysis and a series of comparative studies, the effectiveness and superiority of the proposed isolator are verified. The proposed vibration isolation system with great design flexibility exhibits a significant potential in the field of low-frequency vibration isolation.

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“…This means that the restoring force at any position could be designed according to the demand, unlike the restoring force of other QZS isolators governed by the trigonometric function or the interaction of the magnet. Yao et al [69][70] designed a variation of the CRSM by replacing the traditional cam by a welldesigned track. It helps the CRSM isolator achieve a big motion region, and thus makes the restoring force discontinuous [71] .…”

Section: Introductionmentioning

confidence: 99%

Modeling, analysis, and simulation of X-shape quasi-zero-stiffness-roller vibration isolators

Mao

Yin

Ding

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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Existing quasi-zero stiffness (QZS) isolators are reviewed. In terms of their advantages, a novel X-shape QZS isolator combined with the cam-roller-spring mechanism (CRSM) is proposed. Different from the existing X-shape isolators, oblique springs are used to enhance the negative stiffness of the system. Meanwhile, the CRSM is used to eliminate the gravity of the loading mass, while the X-shape structure leaves its static position. The existing QZS isolators are demonstrated and classified according to their nonlinearity mechanisms and classical shapes. It is shown that the oblique spring can realize negative stiffness based on the simplest mechanism. The X-shape has a strong capacity of loading mass, while the CRSM can achieve a designed restoring force at any position. The proposed isolator combines all these advantages together. Based on the harmonic balance method (HBM) and the simulation, the displacement transmissibilities of the proposed isolator, the X-shape isolators just with oblique springs, and the X-shape isolators in the traditional form are studied. The results show that the proposed isolator has the lowest beginning isolation frequency and the smallest maximum displacement transmissibility. However, it still has some disadvantages similar to the existing QZS isolators. This means that its parameters should be designed carefully so as to avoid becoming a bistable system, in which there are two potential wells in the potential energy curve and thus the isolation performance will be worsened.

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Design and Analysis of a High-Static-Low-Dynamic Stiffness Isolator Using the Cam-Roller-Spring Mechanism

Cited by 20 publications

References 28 publications

Magnetic Negative Stiffness Devices for Vibration Isolation Systems: A State-of-the-Art Review from Theoretical Models to Engineering Applications

Magnetic Negative Stiffness Devices for Vibration Isolation Systems: A State-of-the-Art Review from Theoretical Models to Engineering Applications

Design and Characteristics of a Novel QZS Vibration Isolation System with Origami-inspired Corrector

Modeling, analysis, and simulation of X-shape quasi-zero-stiffness-roller vibration isolators

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