路面平整度评价指标IRI的影响因素

Influencing Factors of International Roughness Index

研究了路面平整度标准评价指标——国际平整度指数(IRI)的计算模型和求解方法,找出了影响IRI精度的主要因素;利用数值模拟定量分析了位移传感器精度、数据采样间隔、评价距离、检测方向和检测车速等对IRI的影响。得出结论:提高位移传感器精度、减少数据采样间隔,可以较大提高IRI的测量精度;检测车速越接近理想车速,IRI测量精度越高;检测方向对IRI测量精度产生影响,但其影响较小。

The computation model and the solution method of IRI(International Roughness Index) are studied,meanwhile,the main influencing factions of IRI precision are found out.The influence of displacement sensors precision,sampling interval,distance,vehicle velocity on IRI precision are analyzed by numerical simulation.A conclusion was drawn that: to improve the precision of displacement sensors and to reduce the measuring error could improve obviously the precision of IRI measurement;the vehicle velocity was nearer to the ideal velocity,the precision of IRI measurement was higher;the measure direction has smaller impact on the precision of IRI measurement.