Genetic Optimization of Repulsive Magnetic Array Negative Stiffness Structure for High-Performance Precision Micro-vibration Isolation

Zhao, Yijun; Cui, Junning; Zou, Limin

doi:10.1007/s42417-022-00449-4

Cited by 3 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, mechanisms to achieve negative stiffness mainly include mechanical springs [39,40], pre-buckled beams [41], geometrically nonlinear structures [42], magnetic structures [43,44], and composite material structures [45]. Linear springs and magnetic repulsion provide positive stiffness.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Zero Stiffness Isolator Suitable for Low-Frequency Vibration

et al. 2023

View full text Add to dashboard Cite

This paper proposes a quasi-zero stiffness (QZS) isolator based on an inclined trapezoidal beam to explore its advantages in low-frequency passive vibration isolation. The nonlinear stiffness of the inclined trapezoidal beam due to the buckling effect is investigated through finite element simulation, and a linear positive stiffness spring is connected in parallel to form a QZS isolator with high-static and low-dynamic stiffness performance. The natural frequency of the isolator in the QZS region is simulated and analyzed, and the dynamic response of the QZS isolator under different damping ratios, excitation and load conditions is explored. The prototype of the QZS isolator was manufactured, and a static compression experiment was conducted to obtain its nonlinear stiffness. The dynamic experiment results verify the correctness of the simulation conclusions. The simulation and experimental data demonstrate that the QZS isolator has the characteristics of lower initial isolation frequency compared with the equivalent linear isolator. The proposed QZS isolator has an initial isolation frequency of 2.91 Hz and achieves a 90% isolation efficiency at 7.02 Hz. The proposed QZS isolator has great application prospects and can provide a reference for optimizing low-frequency or ultra-low-frequency isolators.

show abstract