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首页> 外文会议>Pavement performance: Current trends, advances, and challenges >Golden-Car Simulation Speed and Its Implications to the Relevance of the IRI
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Golden-Car Simulation Speed and Its Implications to the Relevance of the IRI

机译：金车仿真速度及其对IRI相关性的启示

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摘要

The road-monitoring community is considering alternatives to the International Roughness Index (IRI) that are based on the Golden-Car model, but perform the simulation at a speed other than standard value of 80 km/h. Many state and federal highway agencies apply pay adjustments to new road and road resurfacing contracts based on the IRI, but expect significantly higher prevailing travel speeds on very smooth limited-access roads. Inertial profilers also continue to propagate as a tool for monitoring pavement conditions on lower-speed roads, where the posted speed limit or the prevailing traffic speed may be much lower than 80 km/h. The broad application of the IRI to higher and lower-speed roads has created interest by practitioners in the issue of Golden-Car model simulation speed. Changing the simulated forward speed causes predictable changes in the frequency response of the Golden-Car model: the temporal frequency response changes very little, but the spatial frequency response shifts in proportion to speed. However, the quantitative effect on the resulting index values and their relationship to other relevant responses, such as tire load variations and passenger acceleration, are less obvious. This paper explores the potential consequences of changes to the Golden-Car model simulation speed, including changes to the output roughness values and meaning of the roughness scale and roughness threshold values. Most of the discussion relies on numerical and theoretical analysis, with some sample measurements provided for elucidation.
机译：道路监控社区正在考虑基于Golden-Car模型的国际粗糙度指数（IRI）的替代方案，但以标准速度80 km / h以外的速度执行模拟。许多州和联邦公路机构根据IRI对新的公路和路面重铺合同应用薪资调整，但希望在非常通畅的有限通行道路上行驶时的行驶速度会大大提高。惯性剖面仪还继续作为监测低速道路上人行道状况的工具进行传播，在低速道路上，张贴的速度限制或主要行车速度可能远远低于80 km / h。 IRI在高低速道路上的广泛应用引起了从业者对Golden-Car模型仿真速度问题的兴趣。更改模拟的前进速度会导致Golden-Car模型的频率响应发生可预测的变化：时间频率响应的变化很小，但空间频​​率响应的变化与速度成正比。但是，对所得指标值的定量影响及其与其他相关响应（如轮胎负载变化和乘客加速度）的关系不太明显。本文探讨了改变Golden-Car模型仿真速度的潜在后果，包括输出粗糙度值的变化以及粗糙度标度和粗糙度阈值的含义。大部分讨论都依赖于数值和理论分析，并提供一些样本测量值以进行说明。

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