Vibration isolators are widely used in various industries.Despite the wide applications of traditional linear isolators owing to their simplicity,low cost,high reliability and robustness,there exists an inherent contradiction between the static load carrying capacity and low-frequency vibration isolation performance due to their suppress vibration occurring only under the condition that the excitation frequency is greater than √2 times the natural frequency.Nonlinear quasi-zero stiffness(QZS)isolators developed in recent decades can reduce dynamic stiffness when high load carrying capacity is guaranteed,thus widening the isolation band to lower frequencies.This paper reviews main research progress of QZS isolators in terms of construction method,design improvement,and engineering applications,summarizes shortcomings of existing research,and looks forward to future development directions,providing reference for researchers in related fields.
维普
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