| 基于路面不平度自功率谱密度函数计算国际不平度指数的研究 |
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| 引用本文： | 楼少敏,王永达,许沧粟. 基于路面不平度自功率谱密度函数计算国际不平度指数的研究[J]. 公路交通科技, 2007, 24(8): 12-15 |
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| 作者姓名： | 楼少敏 王永达 许沧粟 |
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| 作者单位： | 1. 浙江科技学院,机械学院,浙江,杭州,310012
2. 浙江大学,浙江,杭州,310027 |
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| 基金项目： | 浙江省教育厅科研计划资助项目（20020332） |
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| 摘 要： | 提出了一种基于路面不平度自功率谱密度函数PSD计算国际不平度指数IRI(International Roughness Index)的方法。通过建立1/4车辆模型来分析路面不平度的输入和汽车振动的响应,由动态响应模型的理论分析得到路面不平度的自功率谱密度函数PSD(Power Spectral Density),再应用随机理论等方法,推得基于路面不平度自功率谱密度函数PSD的IRI值。用PSD计算IRI,能够使车辆和道路部门比较他们对路面不平度的各自评价标准,从而作为其设计、改进产品的依据,IRI的求得,为公路运输部门对道路的养护决策提供了依据。
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| 关 键 词： | 道路工程 IRI PSD 路面不平度 1/4车辆模型 |
| 文章编号： | 1002-0268（2007）08-0012-04 |
| 修稿时间： | 2006-04-10 |
Study on Calculation of IRI Based on Power Spectral Density of Pavement Surface Roughness |
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| LOU Shao-min,WANG Yong-da,XU Cang-su. Study on Calculation of IRI Based on Power Spectral Density of Pavement Surface Roughness[J]. Journal of Highway and Transportation Research and Development, 2007, 24(8): 12-15 |
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| Authors: | LOU Shao-min WANG Yong-da XU Cang-su |
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| Abstract: | A new mathematical method of International Roughness Index is proposed,which is based on Power Spectral Density of pavement surface roughness.The quarter-car model is established to analyze the inputs of pavement surface roughness and the outputs of auto vibration.The power spectral density of pavement surface roughness is got by theoretic analyzing of dynamic response models.Applying the method of random vibration theory and so on,IRI which based on PSD of pavement surface roughness is deducted.Using PSD for IRI calculating can make vehicle industries and highway transportation agencies to compare their criteria and improve their production designs,and highway transportation agencies can make appropriate decision for pavement maintain accordingly. |
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| Keywords: | road engineering IRI PSD pavement surface roughness quarter-car model |
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