It is traditionally believed that particles will settle at the nodes or antinodes of a vibrating plate, forming stable standard or inverse Chladni patterns. The Chladni effect has been utilized to manipulate or pattern objects such as solid particles and even biological cells. The motion of particles near the nodal point is usually considered stochastic, and the stable and orderly movement of particles is impossible. Here, we experimentally show that the aggregation of particles can keep in-place rotating with different chirality at the nodal point of a vibrating plate, by utilizing specific dual-frequency oscillating signals to a single vibrator. To understand the motion of particles, irregular whirlpool force fields are calculated by considering the function of time dependent terms of the vibration response. Our findings reveal the time averaged vibrational vortex which can trap and rotate objects or particle clusters. It offers a new controllable degree of freedom for the movement of objects on a Chladni plate.

传统上认为，颗粒会沉降在振动板的节点或波腹处，形成稳定的标准或反向克拉尼图案。克拉尼效应已被用于操纵或图案化物体，例如固体颗粒甚至生物细胞。粒子在节点附近的运动通常被认为是随机的，粒子的稳定有序运动是不可能的。在这里，我们通过实验表明，通过将特定的双频振荡信号用于单个振动器，粒子的聚集可以在振动板的节点处以不同的手性保持原位旋转。为了理解粒子的运动，通过考虑振动响应的时间相关项的函数来计算不规则漩涡力场。我们的研究结果揭示了可以捕获和旋转物体或粒子簇的时间平均振动涡旋。它为 Chladni 板上的物体移动提供了新的可控自由度。