| 振动压实过程土体参数识别方法研究 |
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| 引用本文： | 张青哲,杨人凤,戴经梁.振动压实过程土体参数识别方法研究[J].公路交通科技,2009,26(8). |
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| 作者姓名： | 张青哲 杨人凤 戴经梁 |
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| 作者单位： | 1. 长安大学道路施工技术与装备教育部重点实验事,陕西,西安,710064
2. 长安大学特殊地区公路工程教育部重点实验窒,陕西,西安,710064 |
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| 摘 要： | 为了分析土壤特性与振动压路机在振动压实过程中的动态相互作用关系,提高压实效果,对振动压实过程中土壤刚度、阻尼、土体随振质量及土的固有频率等参数进行动态识别.用相似理论与模型试验法在确定了模型与原型之间的几何相似比并满足载荷相似条件后,根据模型试验结果推导出了原型土体参数;用方程对等法把受简谐激振力作用的振动轮等效为集中质量振动系统,以此作为振动压实过程的力学模型,根据振动微分方程的等效条件进行识别;用幅频特性曲线拟合法以振动压路机-土壤系统动力学方程为基础,用计算机进行动态仿真.分析表明:土的刚度和阻尼,不仅与被压实时土的初始状态、环境温度和湿度等因素有关,而且随振动压实过程中压实度的变化而改变.
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| 关 键 词： | 道路工程 振动压实 相似理论 土体参数识别 刚度 阻尼 |
Study on Identification of Soil Parameters in Vibrating Compaction |
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| ZHANG Qingzhe,YANG Renfeng,DAI Jingliang.Study on Identification of Soil Parameters in Vibrating Compaction[J].Journal of Highway and Transportation Research and Development,2009,26(8). |
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| Authors: | ZHANG Qingzhe YANG Renfeng DAI Jingliang |
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| Affiliation: | 1.Key Laboratory for Highway Construction Technique and Equipment of Ministry of Education;Chang'an University;Xi'an Shaanxi 710064;China;2.Key Laboratory for Special Area Highway Engineering of Ministry of Education;China |
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| Abstract: | To analyze the dynamic interplay of soil characteristics with working parameters of vibrating roller during vibrating compaction process and improve the compaction effect,dynamic identification of the soil parameters such as rigidity,damping,soil additional vibrating mass and natural frequency was conducted.When the geometric similitude ratio of the model to the prototype was determined and the loading similitude condition was satisfied by using similitude theory in structure modeling and experimental techn... |
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| Keywords: | road engineering vibrating compaction similarity theory identification of soil parameter rigidity damping |
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