弹力方程式赛车驱动橡皮筋极限性能测试试验与研究

Performance test and study on the limit of driving rubber band of Formula-E cars

针对弹力方程式赛车国际设计锦标赛中规定使用的驱动橡皮筋进行单轴拉伸和多股旋拧的极限性能测试试验,建立橡皮筋单轴极限拉伸长度与最大旋拧圈数(临界圈数)之间的关系,并推导橡皮筋处于1股状态时的最大旋拧圈数Qmax值。以Qmax为常数,建立橡皮筋缠绕股数n和对应理论临界圈数QnL之间的关系。将得出的理论值QnL与试验值QnS进行对比并计算修正量,推导橡皮筋的实际临界圈数Qn的计算公式,并列出常用参考数据表,为指导弹力方程式赛车的设计工作及提升赛车速度和行驶距离提供理论依据。

In this article,the performance test based on the uniaxial tension and the multi-strand twisting is carried out for the limit of the driving rubber band in the Formula-E International Design Championship.Specifically,the relationship between the uniaxial ultimate tensile length and the maximum twisting circle number(critical circle number)of the rubber band is identified,in order to deduce the maximum twisting circle number Qmax for the rubber band in the 1-strand status;then,Qmax is regarded as a constant to identify the relationship between the rubber band winding strand number n and the corresponding theoretical critical circle number QnL;finally,the theoretical value Qn Lobtained is compared with the experimental value Qn Sfor correction,so as to work out the formula of the actual critical circle number Qn of the rubber band and formulate the list of common reference data,which has provided theoretical basis for both the Formula-E design and the improvement in car speed and driving distance.