An adaptive tuned vibration absorber using a string-mass system with quasi-zero stiffness string tension adjustment mechanism

摘要

This research introduces a new self-tunable Tuned Vibration Absorber (TVA) design employing a stiff string under tension with a mass attached at its midpoint. The major tuning parameter of the design is the string tension. This approach allows varying the natural frequency of the TVA over a wide range with relatively small displacement inputs to the string tip. Dynamic behavior of this system is analyzed both analytically and numerically. A leaf-spring having negative-stiffness behavior is designed using finite element method to be used together with the string to achieve a quasi-zero stiffness (QZS) structure. The force required to vary the string tension is significantly reduced with this combination.