Investigation of Rope-sheave Dynamic Contact Characteristics Based on Absolute Nodal Coordinate Formulation

Abstract Rope-sheave traction mechanisms are crucial components in weight lifting equipment, where the interaction between the rope and the traction sheave is essential for the system’s performance. To address the dynamic contact characteristics of this interaction, this study employs the Absolute Nodal Coordinate Formulation (ANCF) to develop a detailed contact dynamics model of the rope-sheave system. By applying this method, the model accurately simulates the contact force distribution on the traction interface under varying acceleration conditions, revealing that violent impacts lead to significant increases in relative sliding velocity, causing notable fluctuations in friction forces while the normal contact force remains relatively stable. This approach not only enhances our understanding of the underlying mechanics but also provides a robust foundation for improving the motion control strategies of traction systems, thereby effectively reducing friction-induced energy losses.