CAJ | 학술논문

基于三维接触分形理论和固定结合面切向接触阻尼耗能机理，建立了考虑弹塑性接触变形机制的固定结合面切向接触阻尼分形模型。模型仿真结果表明：切向接触阻尼会随着法向接触载荷的增大而增大；当表面分形维数小于等于2.5时，切向接触阻尼会随着分形维数的增大而增大；当表面分形维数大于2.5时，切向接触阻尼会随着分形维数的增大而减小。模型仿真结果也揭示了分形粗糙度尺度参数、塑性指数和摩擦因数对切向接触阻尼的影响。
기우삼유접촉분형이론화고정결합면절향접촉조니모능궤리，건립료고필탄소성접촉변형궤제적고정결합면절향접촉조니분형모형。모형방진결과표명：절향접촉조니회수착법향접촉재하적증대이증대；당표면분형유수소우등우2.5시，절향접촉조니회수착분형유수적증대이증대；당표면분형유수대우2.5시，절향접촉조니회수착분형유수적증대이감소。모형방진결과야게시료분형조조도척도삼수、소성지수화마찰인수대절향접촉조니적영향。
Based on the three-dimensional contact fractal theory and the energy dissipation mechanism of tangential contact damping on fixed joint surfaces,a fractal model of the tangential contact damping on fixed joint surfaces considering the elasto-plastic contact deformation mechanism is proposed. Numerical simulation shows that the tan-gential damping increases with the normal load and the fractal dimension when D≤2. 5,but when > 2. 5 it decrea-ses with the fractal dimension. The results also reveal the other parameters such as fractal roughness scaling param-eter,plasticity index and friction factor are also very important to the tangential contact damping.