| With China’s sustained economic growth, the highway has realized leap-forwarddevelopment.Although the accident rate has declined in recent years, but the number ofaccidents has not been effectively controlled.Many traffic accidents will happen underthe bad weather,and more fatal or serious traffic accidents will occur.How to effectivelysafeguard the traffic safety under bad weather is a major social problem.The speed limitas an important measure to prevent traffic accident and reduce the traffic accidentseverity is particularly important in bad weather.The speed limit of bad weather is morefrom the aspects of visibility, traffic flow and other aspects,but less for the caritself.The paper focused on the influence of the speed limit for vehicle performance as astarting point, systematic study vehicle safety speed problem of bad weather.In this paper, based on ADAMS/car, simulation of the vehicle’s safe driving speedin bad weather.Through the analysis of the effect of bad weather on traffic safety, focuson analysis of rain, snow, fog, strong wind weather on traffic safety, to determine theinfluence factors of them. By analyzing the impact of the speed of the driver, vehicleand traffic safety, the paper expounds the importance of reasonable speed limit.In orderto ensure the safety of vehicles on the highway,according to the dangerous workingconditions in different weather conditions,the paper selects the appropriate parametersdetermine the threshold,for how to judge whether under adverse weather vehicle in asafe state provides discriminant standard.By analyzing the modeling principle ofADAMS/car software,the paper uses ADAMS/car software building roads model,vehicles model and the driver model respectively, and sets up car driving systems underadverse weather,to prepare for next step simulation.Finally, selecting the turns andovertaking which are dangerous working conditions of rainfall weather for simulationanalysis, it is concluded that the critical value of rainfall weather safety speed.In thefreezing weather, choose the conditions of the braking and overtaking for simulationanalysis, and get the critical value. Through evaluate the analysis the critical value ofthe safe speed on rainfall and snow and ice weather,the paper provides reference for thespeed limit under the bad weather. |
