Achieving low-frequency and wide band gaps with a simple and small structure can be a challenging task. In this paper, a new type of six-ligament chiral structure with simple geometric parameters and smaller geometric dimensions is designed. The side length of the chiral unit cell is only 20 mm. The proposed structure and the design idea it embodies may be of assistance to deal with the challenges mentioned above. A numerical simulation is performed to analyze the relationship between the geometric parameters and band gap characteristics of the structure. Based on this relationship, a geometrically optimized structure is proposed and the simulation results show it has better band gap characteristics which can achieve low-frequency and wide band gaps. Moreover, frequency response analysis is used to verify the accuracy of the simulation. Finally, the band gap mechanism is analyzed by analyzing the mode diagrams of the structure.

用简单而小巧的结构实现低频和宽带隙可能是一项具有挑战性的任务。本文设计了一种几何参数简单、几何尺寸更小的新型六韧带手性结构。手性晶胞的边长仅为 20 mm。提议的结构及其体现的设计理念可能有助于应对上述挑战。通过数值模拟分析了结构的几何参数与带隙特性之间的关系。基于这种关系，提出了一种几何优化的结构，仿真结果表明它具有更好的带隙特性，可以实现低频和宽带隙。此外，频率响应分析用于验证仿真的准确性。最后，