【摘要】：為標(biāo)定運行速度模型中的汽車加速度值,在山區(qū)雙車道公路上開展小客車連續(xù)行駛實驗,采集軸向加速度的連續(xù)數(shù)據(jù),并通過斷面觀測得到大客車和大貨車的加速度值,獲得峰值加速度的累積頻率曲線以及統(tǒng)計分布特性,并建立加速度-道路幾何參數(shù)關(guān)系模型.結(jié)果表明:小客車的入彎減速度幅值要比出彎加速度高一倍左右,不宜將加、減速度簡化成同一個值,應(yīng)該分別進(jìn)行標(biāo)定;加速度和減速度累積頻率曲線的斜率突變點都不是發(fā)生在85~(th)百分位,而是臨近95~(th),應(yīng)重新考慮85~(th)百分位的使用價值;大客車的加、減速度幅值非常接近,而重載貨車的減速度要明顯大于加速度,同時,重載貨車的加速度和減速度值要雙雙低于大型客車;小客車的加速度與彎道半徑負(fù)相關(guān),而與彎道轉(zhuǎn)角正相關(guān).
[Abstract]:In order to calibrate the acceleration value of the vehicle in the running speed model, the continuous driving experiment of the minibus was carried out on the two-lane highway in the mountain area, and the continuous data of the axial acceleration were collected, and the acceleration values of the bus and the truck were obtained by the cross-section observation. The cumulative frequency curve and statistical distribution characteristics of peak acceleration are obtained, and the relationship between acceleration and road geometric parameters is established. The results show that the amplitude of the deceleration speed of the passenger car is about twice as high as the acceleration of the exit bending, so it is not appropriate to simplify the speed reduction to the same value, which should be calibrated separately. The slope abrupt point of acceleration and deceleration cumulative frequency curve does not occur in 85 ~ (th) percentile, but should reconsider the use value of 85 ~ (th) percentile near 95 ~ (th),. The deceleration amplitude of the bus is very close, while the deceleration of the heavy truck is obviously larger than the acceleration. At the same time, the acceleration and the deceleration of the heavy truck are both lower than those of the large bus. The acceleration of the passenger car is negatively correlated with the radius of the bend and is positively correlated with the angle of the bend.
【作者單位】： 重慶交通大學(xué)交通運輸學(xué)院;西南交通大學(xué)交通運輸與物流學(xué)院;汽車運輸安全保障技術(shù)交通行業(yè)重點實驗室;
【基金】：交通運輸部應(yīng)用基礎(chǔ)研究項目(2015319814050) 重慶市科技計劃項目(cstc2014jcyj A30024) 汽車運輸安全保障技術(shù)交通行業(yè)重點實驗室開放課題(2014G1502015)
【分類號】：U491

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