【作者】 王程远；

【导师】 蒋工亮；

【作者基本信息】 重庆交通大学 ， 载运工具运用工程， 2014， 硕士

【摘要】 随着我国经济持续增长，高速公路实现了跨越式发展。虽然近年的交通事故率有所下降，但是交通事故数并没有得到有效的控制。在不良天气下交通事故多发，且更易发生重大或者特大交通事故，如何有效的保障不良天气下交通安全是重大的社会问题。限速作为预防交通事故和降低交通事故严重性的重要措施，在不良天气下表现的尤为重要。我国对不良天气下的限速问题多从能见度、交通流等方面进行考虑，而对于车的自身性能方面的考虑较少。本文针对车辆性能对限速的影响为出发点，系统的研究不良天气的安全行驶速度问题。本文基于ADAMS/car，对车辆在不良天气下的安全行驶速度进行仿真。通过分析不良天气对交通安全的影响，重点分析降雨、冰雪、雾、大风天气对交通安全影响，确定它们的影响因素；分析车速对驾驶员、车辆和交通安全的影响，简述了合理限速的重要性；为了保证车辆在高速公路的行驶安全，针对不同天气条件下所选取的危险工况，选取了合适的参数判断阀值，为如何判断不良天气下车辆是否处于安全状态提供判别标准；通过分析ADAMS/car软件的建模原理，应用ADAMS/car软件分别构建道路、车辆、驾驶员模型，建立不良天气下小轿车行驶系统，为下一步仿真做好准备；最后，针对降雨天气选择转弯和超车两种危险工况进行仿真分析，得出降雨天气的安全行驶速度的临界值。冰雪天气，选择制动和超车两种工况进行仿真分析，并得到其临界值。对降雨和冰雪天气的安全速度临界值进行评估分析，为不良天气下的限速提供参考依据。更多还原

【Abstract】 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.更多还原