横倾状态下地板表面形貌对人体步进摩擦的影响

人体在行走过程中足底与地面之间产生的间歇性摩擦现象称为步进摩擦，地板表面形貌作为步进摩擦的重要影响因素之一而受到广泛关注. 现有研究成果多是基于水平路面，对坡度道路，特别是横倾状态下地板表面形貌对人体步进摩擦的影响研究较少. 本文作者以普通碳钢作为地板材料，机械加工出不同的表面形貌，利用止滑试验机研究了水平状态下地板表面形貌与其能够提供的最大临界摩擦系数的关系，利用步进摩擦试验平台研究了横倾状态下地板表面形貌对人体步进摩擦的影响. 结果表明:水平状态下，随着表面粗糙度的增大和表面纹理间距的减小，临界摩擦系数与人体行走实际所产生的有效摩擦系数均增加，防滑性能提高；横倾状态下，随着路面横倾角度的增大，有效摩擦系数及其侧向分量增大，侧滑风险提高；地板表面纹理排列方向对有效摩擦系数的影响明显，横向分布的防滑性能优于纵向. 

Effect of Floor Morphology on Human Stepping Friction under Heeling Condition

Stepping friction of human is an intermittent friction between sole and floor during walking. As one of the important factors of stepping friction, the effect of floor surface morphology had been paid many attentions in recent years. However, the existing researches focus on level walking, and there are only small amounts on ramp walking, especially under heeling condition. Different surface morphologies of floor were planed on carbon steel, the relationships between floor morphology and its maximum critical friction coefficient on level walking were obtained by slipmeter. The effects of floor morphology on stepping friction under heeling condition were measured by gait friction tester. Results showed that both of the critical friction coefficient and available coefficient of friction increased along with the increasing of surface roughness or decreasing of texture distance on level walking, the available coefficient of friction and its lateral component increased along with the increasing of angle under heeling condition, orientation of surface texture significantly affected the slip resistance of floor.