A novel multi-layer isolation structure for transverse stabilization inspired by neck structure

A cylindrical plunge grinding process was modeled to investigate nonlinear regenerative chatter vibration. The rotating workpiece was a slender Euler–Bernoulli beam, and the grinding wheel was a rigid body moving towards the workpiece at a very low feed speed. A numerical method was proposed to provide the critical boundaries for chatter-free grinding. It was demonstrated that the intersection set surrounded by these critical boundaries was the chatter-free region for the considered parameters. When these parameters were outside of the chatter-free region, the stable grinding process underwent a supercritical Hopf bifurcation, resulting in the loss of the chatter-free behavior and the emergence of periodic chatter motions. Then, the periodic motions of both the grinding wheel and the workpiece were predicted analytically using the method of multiple scales, showing the effect of the regenerative force on the grinding process. We demonstrated that the analytical prediction was valid since it agreed with the numerical simulation. The results showed that there exist three kinds of nonlinear chatter motion, with different amplitudes and mode frequencies.

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“…and ε is a small dimensionless coefficient. This is a typical multi-dimensional nonlinear dynamic system [28][29][30].…”

Section: Grinding Wheel Workpiecementioning

confidence: 99%

Stability Analysis and Nonlinear Chatter Prediction for Grinding a Slender Cylindrical Part

Sun

Yan

2023

Processes

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“…Recently, biomimetic nonlinear isolators have received widespread attention from scholars and have achieved many important results. The body structure of animals and humans has greatly inspired researchers and some nonlinear vibration isolators with new structures have emerged, such as bionic polygonal skeleton structure [2], X-shaped structure [3][4][5][6], multi-layer and series structure [7][8]. The QZS isolator has been widely used in engineering practice.…”

Section: Introductionmentioning

confidence: 99%

Study on the performance of a novel 1DOF isolator with QZS characteristics

Wei

2024

J. Phys.: Conf. Ser.

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A typical one-degree-of-freedom (1DOF) shock isolator that has quasi-zero stiffness (QZS) characteristics consists of two transversal springs and one portrait spring. The transversal springs can provide negative stiffness and the vertical spring is used as a load-bearing component. In this article, an improved 1DOF QZS shock isolator is obtained by utilizing the combination of lateral bars and springs. The displacement transmissibility under the harmonic excitation is obtained and the principle of minimum displacement transmissibility under the condition of system stability is proposed. Finally, numerical simulation is conducted, and the simulation results reflect that the proposed 1DOF QZS isolator significantly performs better than the previous one.

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H-infinity optimal control based on output feedback for nonlinear two-degree-of-freedom vibration isolator with quasi-zero stiffness

Wei

2024

Acta Mech

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A novel multi-layer isolation structure for transverse stabilization inspired by neck structure

Cited by 20 publications

References 40 publications

Stability Analysis and Nonlinear Chatter Prediction for Grinding a Slender Cylindrical Part

Stability Analysis and Nonlinear Chatter Prediction for Grinding a Slender Cylindrical Part

Study on the performance of a novel 1DOF isolator with QZS characteristics

H-infinity optimal control based on output feedback for nonlinear two-degree-of-freedom vibration isolator with quasi-zero stiffness

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