关键词: 悬架, 变节距弹簧, 方程式赛车, 平顺性

Abstract: As the seats of formula student racings were rigid connected with frame, the vibration load might has great influences on the drivers. A characteristic curve fitting method of variable pitch spring was analyzed herein, and the variation laws of pitch with loads were obtained. Then, the effects of variable pitch spring on the ride comfort were analyzed, which were compared with linear spring, through random input experiments and determine input experiments. Experiments show that:(1) with the increase of speed, the maximum vertical vibration acceleration of each measuring points increases, while using variable pitch spring they are less than that using linear spring,(2) when the vehicle speed is as 50 km/h, the vertical vibration acceleration of the RMS value of the front axle measuring points and floor near the seat measuring points using variable pitch spring are reduced by 11.02% and 20.06% respectively and ride comfort and damping property are improved visibly comparing with using linear spring.

Key words: suspension, variable pitch spring, formula student racing, ride comfort