發(fā)布時間：2018-06-29 19:29

  本文選題：彎道行走 + 地面支反力�。� 參考：《生物醫(yī)學工程學雜志》2017年01期

【摘要】：通過地面支反力(GRF)求得的利用摩擦系數(shù)(UCOF)是預測行走滑跌可能性的一個有效方法。為了研究不同轉(zhuǎn)彎策略下的利用摩擦系數(shù),進而預測其滑跌可能性,本研究選取了10名健康男性青年進行直道行走與兩種轉(zhuǎn)彎策略(外側(cè)腳轉(zhuǎn)彎與內(nèi)側(cè)腳轉(zhuǎn)彎)下的60°、90°轉(zhuǎn)彎行走試驗,使用ATMI測力臺采集地面支反力數(shù)據(jù),進而求出各行走條件下的利用摩擦系數(shù)。結(jié)果表明,各行走條件下的足-地間內(nèi)外剪切力差異較大;彎道行走的滑跌可能性顯著大于直道行走。對于內(nèi)側(cè)腳轉(zhuǎn)彎,轉(zhuǎn)彎角度對利用摩擦系數(shù)峰值沒有顯著影響。對于外側(cè)腳轉(zhuǎn)彎,推進力隨轉(zhuǎn)彎角度的增大而減小,這使得60°轉(zhuǎn)彎時的利用摩擦系數(shù)峰值相較于90°轉(zhuǎn)彎明顯增大。這表明,彎道角度對內(nèi)側(cè)腳轉(zhuǎn)彎時的滑跌概率影響較小,而對外側(cè)腳轉(zhuǎn)彎影響較大,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 擄/ 90 擄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 擄turn significantly larger than that of the 90 擄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.
【作者單位】： 天津科技大學機械工程學院;天津科技大學天津市輕工與食品工程機械裝備集成設計與在線監(jiān)控重點實驗室;西北工業(yè)大學工業(yè)設計研究所;
【基金】：高等學校博士學科點專項科研基金資助項目(20131208110005)
【分類號】：O313.5;R318
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本文編號：2083126