自行车骑行过程中脚踏力的分析

PEDAL FORCES ANALYSIS IN BICYCLE RIDING

本文提出了把在骑行过程中的脚踏力分解为直接由纯关节力矩而产生的肌肉分量和由重量与惯性力的作用产生的非肌肉分量的分析方法．在平面关节运动和关节力矩给定条件下，利用Ｎｅｗｔｏｎ－Ｅｕｌｅｒ系统中的动力学方程求解两个分量．通过在３个不同转速下承受普通载荷的自行车脚踏力的分析为例来说明脚踏力的分解方法．主要的结果是：非肌肉力分量的大小随转速增加而增加，肌肉力分量的大小基本保持相对恒定．

An analysis method on pedal forces in bicycle riding is presented in this paper. Pedal forces are divided into two parts, one is muscle force resulted pure joint torque, another is non-muscle force exerted by gravity and inertia force. When planar joint motion and joint torque are given, we can find out two components by Newton-Euler equation. As an example that a bicycle works under three different revolution speeds and normal load, we demonstrate the method of pedal force. Main conclusions are: non-muscle component of force increases with the revolution speed and muscle components of force essentially maintains fixed.