The use of phononic crystals for vibration attenuation and isolation has been widely studied, showing that the attenuation frequency range depends on their mass and stiffness. The concepts of chirality and tacticity have been introduced into classical phononic crystals to enrich the dynamics of the mass elements and thereby achieve lower frequency ranges with high vibration attenuation. Although these concepts have demonstrated their effectiveness on lab-scale crystals, their implementation in industrial applications is still rare. Chiral phononic crystals require a complex geometry that complicates their manufacturing. Existing examples require to be fabricated by 3D printing, making them expensive to build on a large scale for demonstration purposes or in-situ applications. In this study, we redefine a chiral phononic crystal design for translational-rotational coupling in order to enable its manufacturability using exclusively conventional processes. We then investigate the design space of these newly designed phononic crystals, using a simplified unit cell FEM model that minimizes computation time. A parametric study is conducted to investigate the crystal's tunability by modifying the dimensions of the chiral links between the masses. A large crystal with ultra-low frequency range attenuation -- starting at 60~Hz -- is then designed, with the aim to demonstrate the influence of the crystal's tacticity on the vibration isolation by hand sensing. A crystal composed of 2 unit cells is manufactured and its measured transfer function is compared with numerical predictions, thus highlighting the disparities between the behavior of the structure under real-life and ideal excitation conditions.
在声子学领域，周期性模式控制振动，从而控制物质中的热和声音的流动。在这种声子晶体中产生的带隙实现了低耗散振动模式，并实现了对机械量子比特、高效波导和最先进传感的应用。在这里，我们结合声子和二维材料，并探讨通过施加机械压力操纵声子晶体的可能性。为此，我们制造了最薄的声子晶体从单层石墨烯和模拟其振动特性。我们发现一个带隙的MHz制度，在此范围内，我们本地化的缺陷模式与一个小的有效质量为0.72 ag = 0.002 $m_{physical}$。最后，我们利用石墨烯的灵活性和机械调谐有限大小的声子晶体。在高达30千帕的静电压力下，我们观察到整个声子系统的频率上升超过350%。同时，缺陷模式保持在带隙内并保持局部化，这表明高质量、动态可调的机械系统。
