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 max...
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