Abstract
ABSTRACT The wide bandwidth and low frequency of band gap characteristic are important points in vibration reduction. A novel three-ligament chiral structure with flexure hinges is proposed. The effects on in-plane and out-of-plane mechanical properties of the new structure are studied through altering different geometric parameters of the flexure hinge. The results indicate that this new structure has excellent mechanical properties by only adjusting geometric parameters of the flexure hinge without changing geometric parameters of the chiral structure. Those parameters such as the radius and central angle of the notch arc, quantity of arc flexure hinges, and distance between centers of the notch arc of two flexure hinges have significant effects on mechanical properties. In addition, flexure hinges can affect the band gap characteristic of the chiral structure. The novel structure has a lower starting frequency and narrower bandwidth than the common chiral structure. The results of this paper may provide references for the design of the chiral structure in engineering.
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