华南理工大学学报(自然科学版)
華南理工大學學報(自然科學版)
화남리공대학학보(자연과학판)
JOURNAL OF SOUTH CHINA UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
4期
7-13,27
,共8页
许伦辉%胡三根%伍帅%罗强
許倫輝%鬍三根%伍帥%囉彊
허륜휘%호삼근%오수%라강
公路运输%超车模型%车辆类型%双车道超车%车辆运行特性
公路運輸%超車模型%車輛類型%雙車道超車%車輛運行特性
공로운수%초차모형%차량류형%쌍차도초차%차량운행특성
highway transportation%overtaking model%vehicle type%two-lane overtaking%vehicle running charac-teristic
鉴于现有的超车模型往往会忽视超车过程中车辆运行特性对超车行为的影响,文中在现有超车模型的基础上,对超车车辆依据车辆运行特性进行分类,设计了双车道车辆超车场景,并考虑不同道路等级的设计时速,建立了计算超车车辆从超车行为产生到超车过程结束所需的超车时间和距离的数学模型。最后,选择不同类型车辆、超车速度及行车速度,分别计算了微型车、小客车和中大型车在双车道公路超车的时间和距离,并与现有的超车模型计算结果进行对比分析。结果表明:双车道公路超车时间和距离与车辆类型、超车速度、超车车辆与被超车辆的行车速度和对向车辆速度密切相关;文中模型由于考虑车辆的运行特性,不同车辆超车所需的超车时间和距离是不相同的,计算结果更符合实际超车现象。
鑒于現有的超車模型往往會忽視超車過程中車輛運行特性對超車行為的影響,文中在現有超車模型的基礎上,對超車車輛依據車輛運行特性進行分類,設計瞭雙車道車輛超車場景,併攷慮不同道路等級的設計時速,建立瞭計算超車車輛從超車行為產生到超車過程結束所需的超車時間和距離的數學模型。最後,選擇不同類型車輛、超車速度及行車速度,分彆計算瞭微型車、小客車和中大型車在雙車道公路超車的時間和距離,併與現有的超車模型計算結果進行對比分析。結果錶明:雙車道公路超車時間和距離與車輛類型、超車速度、超車車輛與被超車輛的行車速度和對嚮車輛速度密切相關;文中模型由于攷慮車輛的運行特性,不同車輛超車所需的超車時間和距離是不相同的,計算結果更符閤實際超車現象。
감우현유적초차모형왕왕회홀시초차과정중차량운행특성대초차행위적영향,문중재현유초차모형적기출상,대초차차량의거차량운행특성진행분류,설계료쌍차도차량초차장경,병고필불동도로등급적설계시속,건립료계산초차차량종초차행위산생도초차과정결속소수적초차시간화거리적수학모형。최후,선택불동류형차량、초차속도급행차속도,분별계산료미형차、소객차화중대형차재쌍차도공로초차적시간화거리,병여현유적초차모형계산결과진행대비분석。결과표명:쌍차도공로초차시간화거리여차량류형、초차속도、초차차량여피초차량적행차속도화대향차량속도밀절상관;문중모형유우고필차량적운행특성,불동차량초차소수적초차시간화거리시불상동적,계산결과경부합실제초차현상。
As the existing overtaking models often ignore the impact of vehicle running characteristics on the overta-king behavior, this paper puts forward a new mathematical model to calculate the time required for overtaking and the distance for the vehicle from its overtaking beginning to the end.In the investigation, the existing models are analyzed, the overtaking vehicles are classified according to their types, a two-lane overtaking scene is designed, and the speed limits of different road grades are taken into full consideration.Moreover, the required overtaking time and the overtaking distance of micro cars, mid-size cars and full-size cars on two-lane highway are calculated for various vehicle types with different overtaking speeds and driving speeds, and the results are compared with those obtained by the existing overtaking model.It is found that the required overtaking time and the overtaking dis-tance are both related to the vehicle type, the overtaking speed, the driving speed of the overtaking vehicle and the driving speed of the opposite vehicles;and that the proposed model helps to obtain overtaking time and distance va-rying with vehicle types because it well considers vehicle running characteristics, so that it accords better with the actual overtaking process.