弯道行走地面支反力与利用摩擦系数的研究

发布时间：2018-06-29 19:29

  本文选题：弯道行走 + 地面支反力　； 参考：《生物医学工程学杂志》2017年01期

【摘要】：通过地面支反力(GRF)求得的利用摩擦系数(UCOF)是预测行走滑跌可能性的一个有效方法。为了研究不同转弯策略下的利用摩擦系数,进而预测其滑跌可能性,本研究选取了10名健康男性青年进行直道行走与两种转弯策略(外侧脚转弯与内侧脚转弯)下的60°、90°转弯行走试验,使用ATMI测力台采集地面支反力数据,进而求出各行走条件下的利用摩擦系数。结果表明,各行走条件下的足-地间内外剪切力差异较大;弯道行走的滑跌可能性显著大于直道行走。对于内侧脚转弯,转弯角度对利用摩擦系数峰值没有显著影响。对于外侧脚转弯,推进力随转弯角度的增大而减小,这使得60°转弯时的利用摩擦系数峰值相较于90°转弯明显增大。这表明,弯道角度对内侧脚转弯时的滑跌概率影响较小,而对外侧脚转弯影响较大,角度越大滑跌概率越小。
[Abstract]:The coefficient of friction (UCOF) obtained by the ground branch reaction force (GRF) is an effective method to predict the possibility of strike-slip. In order to study the use of friction coefficient under different turning strategies, and then predict the possibility of sliding, In this study, 10 healthy young men were selected to carry out 60 掳/ 90 掳turn walking test under straight walk and two turning strategies (lateral foot turn and inner foot turn), and ATMI force table was used to collect the data of ground branch reaction force. Then, the friction coefficient of each walking condition is obtained. The results show that there are great differences in the shear forces between the foot and the ground under different walking conditions, and the slip and fall probability of curve walking is significantly higher than that of straight track walking. For the inner foot turn, the turning angle has no significant effect on the peak value of the coefficient of friction. For the lateral foot turn, the propelling force decreases with the increase of the turning angle, which makes the peak value of the coefficient of friction at 60 掳turn significantly larger than that of the 90 掳turn. The results show that the angle of curve has little effect on the slip probability of the inner foot, but the bigger the angle is, the smaller the slip probability is.
【作者单位】： 天津科技大学机械工程学院;天津科技大学天津市轻工与食品工程机械装备集成设计与在线监控重点实验室;西北工业大学工业设计研究所;
【基金】：高等学校博士学科点专项科研基金资助项目(20131208110005)
【分类号】：O313.5;R318
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本文编号：2083126