Abstract
According to the accident analysis of vehicles in the curve, the skidding, rollover, and lateral drift of vehicles are determined as means to evaluate the lateral stability of vehicles. The utility truck of rear-wheel drive (RWD) is researched, which is high accident rate. Human-vehicle-road simulation models are established by CarSim. Through the orthogonal experiment method, the effects of different road geometries, speed, and interaction factors between road geometries on vehicle lateral stability are studied. In this paper, skidding risk of the vehicle is characterized by the Side-way Force Coefficient (SFC). Rollover risk of the vehicle is characterized by lateral acceleration and the load transfer ratio. Lateral drift risk of the vehicle is characterized by the sideslip angle of wheels. The results of orthogonal analysis reveal that the maximum tire-road friction coefficient and speed are highly significant in skidding of the vehicle. The effects of the combination of horizontal alignment and superelevation on vehicle skidding are important. The effects of horizontal alignment and speed on vehicle rollover risk are highly significant. The effects of superelevation on vehicle rollover risk are significant. The effects of the interaction of horizontal alignment and superelevation are also important on vehicles’ rollover risk. The speed and the maximum tire-road friction coefficient have highly significant effect on the vehicle’s lateral drift. The superelevation has a significant effect on the vehicle’s lateral drift. The effects of the interaction of horizontal alignment and superelevation and longitudinal slope are also important on the lateral drift of the vehicle.
Highlights
Road accidents caused by lateral stability of the vehicle have always been a tough concern of vehicle safety in the world
Based on the analysis of vehicles accident in a curve, the skidding, rollover, and lateral drift of vehicles are determined as the means to evaluate the lateral stability of vehicles
Aiming at the high accident rate of utility trucks with rear-wheel drive (RWD), simulation models of Human-Vehicle-Road are established by CarSim. rough the orthogonal analysis design method, the effects of road geometry, speed factors, and interaction between road geometries on the lateral stability of vehicles are studied
Summary
Road accidents caused by lateral stability of the vehicle have always been a tough concern of vehicle safety in the world. Road traffic accidents are mainly caused by three factors: roads, drivers, and vehicles. E shortcomings of the existing research on the impact of road factors on vehicle accidents caused by lateral stability are reflected in threefold. E references were seldom on the effect of road geometry on vehicle dynamics and, extended to vehicle lateral stability. The existing research studies on the effect of road geometry on vehicle lateral stability mainly consider vehicle rollover or skidding. Compared with passenger cars, pickup, vans, large trucks, and buses, utility trucks have the highest rollover occurrence caused by single-vehicle crashes (64.7%). Rough orthogonal experiment, the effects of different road geometries, speed, and interaction factors on vehicle lateral stability are studied. Significance analysis of skidding, rollover, and lateral drift are carried out to characterize vehicle lateral stability
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