| 春融期重载车辆-路面-路基垂向动力分析模型 |
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| 引用本文： | 张锋,冯德成,凌贤长,王子玉,朱占元.春融期重载车辆-路面-路基垂向动力分析模型[J].中国公路学报,2011(4). |
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| 作者姓名： | 张锋 冯德成 凌贤长 王子玉 朱占元 |
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| 作者单位： | 哈尔滨工业大学路基与防护工程研究所;哈尔滨工业大学土木工程学院;哈尔滨工业大学交通科学与工程学院;四川农业大学城乡建设学院; |
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| 基金项目： | 国家西部交通建设科技项目(200631800004); 教育部高等学校博士学科点专项科研基金项目(20092302110053) |
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| 摘 要： | 针对季节冻土区春融期重载车辆作用下道路病害突出的问题,以三轴重载汽车为例,建立季节冻土区春融期重载车辆-路面-路基体系垂向动力学物理模型;基于D' Alembert原理推导了重载车辆、路面和路基冻结层的振动微分方程,并采用Wilson-θ法对动力方程求解。数值仿真结果表明:建立的路面-路基体系模型能够反映季节冻土区春融期路基呈层状分布且刚度软化的特性;随着车体质量增加和路基融化层刚度的降低,路面振动位移平均峰值和路面振动加速度平均峰值基本呈线性增加;车辆行驶速度增大,路面振动加速度平均峰值增大,优势频段数目增多、优势频率增大;路面振动位移平均峰值呈锯齿型;路基冻结层厚度增加,路面振动位移平均峰值和路面振动加速度平均峰值降低,当其厚度大于0.3 m后趋于稳定。
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| 关 键 词： | 道路工程 重载车辆-路面-路基垂向动力分析模型 数值模拟 路面振动响应 春融期 |
Vertical Dynamical Analysis Model of Heavy Vehicle-pavement-subgrade During Spring-thawing Period |
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| ZHANG Feng,,FENG De-cheng,LING Xian-zhang,WANG Zi-yu,ZHU Zhan-yuan.Vertical Dynamical Analysis Model of Heavy Vehicle-pavement-subgrade During Spring-thawing Period[J].China Journal of Highway and Transport,2011(4). |
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| Authors: | ZHANG Feng FENG De-cheng LING Xian-zhang WANG Zi-yu ZHU Zhan-yuan |
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| Institution: | ZHANG Feng1,2,3,FENG De-cheng1,LING Xian-zhang1,WANG Zi-yu1,ZHU Zhan-yuan4(1.Institute of Subgrade and Protection Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China,2.School of Civil Engineering,3.School of Transportation Science and Engineering,4.School of Urban and Rural Construction,Sichuan Agricultural University,Dujiangyan 611830,Sichuan,China) |
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| Abstract: | Aimed at problem of serious pavement and subgrade disease under heavy vehicle during the spring-thawing period in seasonal frozen region,taking three axles heavy vehicle as an example,a vertical dynamical physical model of heavy vehicle-pavement-subgrade system during the spring-thawing period in seasonal frozen region was developed.Based on the D'Alembert principle,the dynamic differential equations of heavy vehicle,pavement and frozen subgrade layer were presented,and the dynamic equations were solved by ... |
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| Keywords: | road engineering vertical dynamical analysis model of heavy vehicle-pavement-subgrade numerical simulation pavement vibration response spring-thawing period |
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