汽车试验场中度标准搓板路的强化系数

Enhancement Coefficient of Moderate Standard Washboard Road of Automobile Proving Ground

为了进一步提高试验场可靠性强化试验及结果评价的合理性,利用有限元仿真的方法和Smith-WatsonTopper疲劳寿命预测理论,分析了不同车速、车辆质量及轴距条件下试验样车前地板部件的疲劳寿命,计算了中度标准搓板路的强化系数,绘制了K-v,K-m和K-L曲线,探讨了车速、质量及轴距对强化系数的影响。绘制了K-vm和K-v-L曲面,给出了K-v-m和K-v-L回归模型。研究结果把强化系数扩展到了强化区间,揭示了强化系数随着车速、车辆质量及轴距变化的规律。根据强化系数的变化可对试验规程适当修正,进而得到更加准确的评价结果。

The finite element method and Smith-Watson-Topper theory are used to improve the rationality of the reliability enhancement test and its results evaluation on proving ground and.The fatigue life of the test car＇s front floor is assessed in different velocities,masses and wheelbases by calculating each coefficient of a moderate standard washboard road.Then,the influences of vehicle velocity,mass and wheelbase on the washboard road enhancement coefficient are discussed according to the K-v,K-m and K-L curves.K-v-m and K-v-L surfaces are drawn,and K-v-m and K-v-L regression models are given.The study extends the enhancement coefficient to the enhancement interval,revealing its changing rules with velocity,mass and wheelbase in order to help accurately evaluate the results.