标题： 干扰转变和多分散软粒子包装的正常模式 显示英文标题

标题： Jamming transition and normal modes of polydispersed soft particle packing

摘要： 软粒子的干扰转变，由窄尺寸分布表征，已由物理学家进行了深入研究。 然而，多分散系统更与工程相关，而多分散性对干扰现象的影响仍未被探索。 在此，我们数值研究了二维多分散软粒子的干扰转变。 我们发现，多分散性强烈影响接触力、局部配位和干扰转变密度。 相反，压力和弹性模量的临界标度不受粒子尺寸分布的影响。 与此观察一致，我们发现振动态密度也对多分散性不敏感。 我们的结果表明，无论粒子尺寸分布如何，接近干扰的软粒子堆积的机械和振动性质均由到干扰的距离所支配。 显示英文摘要

摘要： The jamming transition of soft particles characterized by narrow size distributions has been well studied by physicists. However, polydispersed systems are more relevant to engineering, and the influence of polydispersity on jamming phenomena is still unexplored. Here, we numerically investigate jamming transitions of polydispersed soft particles in two dimensions. We find that polydispersity strongly influences contact forces, local coordination, and the jamming transition density. In contrast, the critical scaling of pressure and elastic moduli is not affected by the particle size distribution. Consistent with this observation, we find that the vibrational density of states is also insensitive to the polydispersity. Our results suggest that, regardless of particle size distributions, both mechanical and vibrational properties of soft particle packings near jamming are governed by the distance to jamming.