关键词: 煤矿机械, 冲击行为, 能量分配, 装置设计, 仿真分析

Abstract:  To study the impact damage behaviors of coal mining machinery during service, the horizontal impact of a spherical projectile on a metallic rectangular plate was used as a case study to derive the energy distribution relationship during impact processes. In line with the actual impact conditions, a pneumatic horizontal impact testing system was designed and constructed to capture the impact response of plates under varying air pressures. Through simulations and experiments, the theoretically calculated deformation and acceleration were validated, and a polynomial fitting approach was used to optimize the acceleration of output parameters. The computations, experiments, and simulations were compared. Results show that the kinetic energy of the projectile is primarily expended on plastic deformation of material, kinetic energy of motion, and collision loss during impact. When the central region of impacted plate fractures, the energy dissipates through plastic deformation and collision loss decreases. The refined theoretical, experimental, and simulation results for energy distribution relationship show good agreement during the impact processes, with a maximum deviation of less than 9.39%. 

Key words: coal mining machinery, impact behavior, energy distribution, device design, simulation analysis