论文部分内容阅读
提供了一种利用颗粒流模型模拟刹车失灵货车驶入避险车道制动床后的运动过程,进而确定制动床长度的方法。所建立的颗粒流模型能够较好地模拟刹车失灵货车驶入避险车道制动床后的运动过程。仿真模拟结果显示,FHWA方法偏不安全,工程设计时制动床长度不应小于FHWA方法计算值;制动床坡度越小,FHWA方法计算出的制动床长度越偏不安全。为不同制动床设计条件下制动床长度的确定提供了一种较为简便、实用的方法。
A method of using the particle flow model to simulate the movement process of a brake failure truck into the brake bed of the safe haven and then to determine the length of the brake bed is provided. The established particle flow model can well simulate the movement process of the brake failure truck entering the braking bed of the safe haven. The simulation results show that the FHWA method is unsafe and the length of the brake bed should not be less than that calculated by the FHWA method. The smaller the brake bed slope, the more unstable the brake bed length calculated by the FHWA method. It provides a more convenient and practical method for the determination of the length of the brake bed under different design conditions of the brake bed.