• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 40-50.doi: 10.3901/JME.2021.12.040

• 特邀专栏:汽车-道路相互作用动力学前沿问题 • 上一篇    下一篇

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随机不平度激励下车辆-沥青路面动力学响应分析

马宪永1, 全蔚闻1, 董泽蛟1, 司春棣2, 李韶华3   

  1. 1. 哈尔滨工业大学交通科学与工程学院 哈尔滨 150090;
    2. 石家庄铁道大学交通运输学院 石家庄 050043;
    3. 石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室 石家庄 050043
  • 收稿日期:2020-07-03 修回日期:2020-12-26 出版日期:2021-08-31 发布日期:2021-08-31
  • 通讯作者: 董泽蛟(通信作者),男,1979年出生,博士,教授,博士研究生导师。主要研究方向为路面计算力学、智能监测与可持续发展材料。E-mail:hitdzj@hit.edu.cn
  • 作者简介:马宪永,男,1992年出生,博士,讲师。主要研究方向为路面计算力学与智能监测。E-mail:maxianyong@hit.edu.cn
  • 基金资助:
    国家重点研发计划(2018YFB1600100)、国家自然科学基金(U20A20315,52008139)、中国博士后科学基金(2020M670915)、黑龙江省自然科学基金杰出青年(JC2018013)、省部共建交通工程结构力学行为与系统安全国家重点实验室重点开发课题(KF2020-01)和中央高校基本科研业务费专项资金资助项目

Research on Dynamic Response of Vehicle and Asphalt Pavement Interaction under Random Unevenness Excitation

MA Xianyong1, QUAN Weiwen1, DONG Zejiao1, SI Chundi2, LI Shaohua3   

  1. 1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090;
    2. School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043;
    3. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043
  • Received:2020-07-03 Revised:2020-12-26 Online:2021-08-31 Published:2021-08-31

摘要: 高效准确地获取随机不平度激励下车辆-沥青路面交互作用特性,对路面友好型车辆设计、路面服役性能评估极为必要。采取解析法和顺序解耦的求解思路,首先推导随机不平度激励下1/4车辆模型的随机动荷载;而后借助相对坐标变换和Fourier积分变换,基于波传递方法,推导移动车辆随机动荷载作用下黏弹性多层体系沥青路面动力响应解析解,并编制相应的数值计算程序。通过车辆-路面动力学响应算例分析,得出沿车辆移动方向各纵向位置处的沥青路面动力响应幅值与随机动荷载相关。通过车辆-路面系统参数影响分析,可以发现,降低悬架和轮胎刚度系数、增大悬架阻尼系数可以降低沥青层底纵向应变,有利于提高路面疲劳寿命;轮胎阻尼系数对路面动力响应几乎无影响;路面不平度的劣化会显著加剧路面疲劳损伤;增大车辆移动速度会降低沥青层底纵向应变均值,但会增大其变异系数,故为了准确评估路面疲劳寿命,需充分考虑车辆移动速度对动力响应均值和变异系数的综合影响。

关键词: 沥青路面, 车辆模型, 不平度, 解析解, 黏弹性, 动力响应

Abstract: Obtaining the vehicle and asphalt pavement interaction characteristics under the excitation of random unevenness efficiently and accurately are necessary for road-friendly vehicle design and pavement performance evaluation. The analytical method and the solution idea of sequential decoupling are adopted. Firstly, the random dynamic load of the quarter vehicle model under random unevenness excitation is derived. Then, with the help of relative coordinate transform and Fourier integral transform, the analytical solution for the dynamic response of the viscoelastic multilayered asphalt pavement subjected to the random dynamic moving load is derived based on the wave propagation method, and the numerical program is compiled. Through analyzing the example of vehicle-pavement dynamic response, it can be found that the dynamic response amplitude of the asphalt pavement at each longitudinal position along the vehicle moving direction is related to the random dynamic load. Through the parameter analysis of vehicle-pavement system, it can be found that reducing the suspension and tire stiffness coefficients, or increasing the suspension damping coefficient can reduce the longitudinal strain at the bottom of the asphalt layer, which is beneficial to improve the pavement fatigue life; Tire damping coefficient has almost no effect on pavement dynamic response; The deterioration of pavement unevenness can significantly exacerbate pavement fatigue damage; Increasing the vehicle moving speed can reduce the average value of longitudinal strain at the bottom of the asphalt layer, but increase its variation coefficient, thus the effect of the vehicle moving speed on the average value and variation coefficient of the dynamic response should be comprehensively considered to evaluate the pavement fatigue life accurately.

Key words: asphalt pavement, vehicle model, unevenness, analytical solution, viscoelasticity, dynamic response

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