摘要
为了分析轮胎与路表的接触特性及其对路面抗滑性能的影响,采用路面纹理测量车(road surface tester)获取路表纹理二维轮廓离散数据,运用印痕法模型,利用MATLAB软件计算路表纹理包络轮廓,进一步计算了包络轮廓对应的平均断面深度(mean profile depth,MPD)、宏观纹理表面构造水平指数LMa(macro texture indices calculated with texture level)、粗大纹理表面构造水平指数LMe(mega texture indices calculated with texture level)等纹理指标,并与初始轮廓纹理指标进行对比;最后计算包络轮廓、初始轮廓纹理参数MPD、LMa与路面摩擦因数(longitudinal frictional coefficient,LFC)的相关性系数,分析了路表纹理包络轮廓对路面抗滑性能的影响。研究结果表明:包络轮廓纹理参数与初始轮廓纹理参数相关性良好(判定系数R2>0.85);包络轮廓MPD值较初始轮廓MPD值有明显下降,且初始轮廓MPD值越大,包络轮廓MPD值下降幅度也越大;包络轮廓表面构造水平指数较初始轮廓表面构造水平指数下降,LMa的下降幅度比LMe的下降幅度高10%左右;印痕法参数S取值对包络轮廓纹理参数有较大影响,S值越小,其对应的包络轮廓纹理参数值较初始轮廓纹理参数值下降的幅度越大;此外,包络轮廓纹理参数与摩擦因数的判定系数较初始轮廓纹理参数与摩擦因数的判定系数有较大提升,其中MPD与摩擦因数的判定系数提高了约35%,LMa与摩擦因数的判定系数提高了约23%;印痕法参数S值越小,包络纹理参数与摩擦因数的判定系数越高。该结果可为研究胎-路接触特性对路用性能的影响提供参考。
To analyze tire-road contact characteristics and the effect of the contact on pavement skid resistance, the two-dimensional discrete data of the road texture profile was measured using the road surface tester, and the enveloped profile was calculated using the indentor method in MATLAB. Based on the enveloped profile, texture parameters such as mean profile depth(MPD), macro texture indices calculated with texture level(LMa), and mega texture indices calculated with texture level(LMe) were calculated, and comparisons were made between these and the original profile. Then, the correlation between the friction value(longitudinal friction coefficient, LFC), and the calculated texture parameters considering the original and enveloped texture profiles were analyzed. The results show that the calculated texture parameters with the enveloped profile have a high correlation with those calculated with the original profile, the determination coefficient R2 is higher than 0.85. The calculated MPD value with the enveloped profile shows a significant decrease, compared to that calculated with the original profile, and the larger the original MPD value, the greater the decrease in the envelope contour MPD value. The calculated texture level indices with the enveloped profile are also reduced when compared to the original. The decline rate of LMa is about 10% higher than LMe. The variable parameter S from the indentor method has a significant impact on the enveloped texture parameters, texture parameters with a smaller S show a higher decline. The determination coefficients between friction value LFC and calculated pavement texture parameters with the enveloped profile improved significantly compared with the original, with an increase of approximately 35% in MPD and 23% in LMa. The research results can provide a reference for studying the effect of tire-road contact characteristics on road performance. 2 tabs, 14 figs, 27 refs.
作者
冉茂平
周兴林
肖神清
VIEIRA Tiago
SANDBERG Ulf
RAN Mao-ping;ZHOU Xing-lin;XIAO Shen-qing(School of Automotive and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430065,Hubei,China;Swedish National Road and Transport Research Institute(VTI),Linkoping 58235,Ostergotland,Sweden;School of Traffic Science and Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China)
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第5期11-19,共9页
Journal of Chang’an University(Natural Science Edition)
基金
国家自然科学基金项目(51778509,51578430)
湖北省自然科学基金项目(2018CFB293)
湖北省教育厅科研项目(B2016011)
关键词
道路工程
包络轮廓
印痕法
胎-路接触
抗滑
road engineering
enveloped profile
indentor method
tire-road interaction
skid resistance
