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Design of Multiple Quasi-Zero Stiffness Isolators Based on a Shallow Arch
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DOI：10.1142/S0219455426501476.png)
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Abstract
En 中文
The quasi-zero stiffness (QZS) structure is capable of achieving a satisfactory low-frequency vibration isolation effect. However, the majority of current QZS structure designs are complex, comprising a single working load and a relatively limited QZS zone. This paper presents the development of a multi-quasi-zero (MQZS) stiffness vibration structure based on a circular shallow arch structure. The static compression of the unit structure was studied in detail using the theoretical derivation, and finite element simulation, which can achieve multiple loads and a big QZS zone using the symmetrical and orthogonal connections, respectively. An analytical solution for the transfer rate was derived by solving the nonlinear dynamic equations of the system using the Harmonic Balance Method (HBM). In comparison to the conventional QZS system and the linear system, the vibration isolation frequency of the MQZS system is reduced by 75%, and the vibration transmissibility is reduced by 22dB at the same frequency. Furthermore, the findings based on 3D printing demonstrate that the designed MQZS isolator exhibits an effective low-frequency vibration isolation effect and has promising potential for meeting the requirements of integration and lightweight design.
Keywords:
Quasi-zero stiffness (QZS)
vibration isolation
nonlinear dynamic
low-frequency
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