旧路工程线形与平整度耦合共振研究  

Study on Coupling Resonance of Alignment and Flatness of Old Road

作　　者：杜永平 鲁雯卓 DU Yong-ping;LU Wen-zhuo(Tongji Architechural Design(Group)Company Limited,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《公路交通科技》2024年第1期25-34,89,共11页Journal of Highway and Transportation Research and Development

摘　　要：为追索旧路工程中行驶舒适性问题的主要根源,在受力分析的基础上,将线形参数、平整度纳入动力学方程中,建立了“人-车-路”动力学模型,在国内外研究成果基础上选择了振动感知、舒适性评价标准;以网格计算展开研究,首先以120 km/h车速为例分别进行了平整度、线形以及二者耦合共振3种工况下加权加速度等动力学指标计算,对动力学计算结果分析,确定耦合共振区范围,建立了耦合共振评价指标;分析加权加速度均方根、峰值及其扩大系数计算结果后,结合耦合共振类型划分,总结耦合共振的控制因素、形态、特征和影响范围。其次对影响行车舒适性的平整度控制型展开初始角、波长、波幅以及速度主要参数变化与加权加速度均方根等指标计算,计算出初始角影响加权加速度均方根变化范围,完善了各代表车速条件下波长变化与加权加速度均方根等指标的相互关系,通过回归确定了波幅、车速与加权加速度均方根等指标的直线、多次抛物线函数关系。最后研究了相互干扰型耦合共振各代表车速条件下竖曲线半径与加权加速度均方根及其扩大系数关系,两者呈抛物线函数。结果表明:耦合共振影响行车舒适性主要控制因素为平整度的频率、波幅;随着车速降低,影响行车舒适性的波长越来越短,范围越来越小;竖曲线半径越大,耦合共振越小。In order to trace the main source of the driving comfort problem on the old road,the linear parameters and flatness are incorporated into the dynamic equation which is based on the force analysis,and the human-vehicle-road dynamic model is established.Based on the domestic and international study results,the vibration perception and comfort evaluation criteria are selected and the study is carried out by using grid calculation.Firstly,taking the 120 km/h vehicle speed as an example,the dynamic indicators such as weighted acceleration under 3 working conditions of flatness,alignment and coupling resonance are calculated respectively.The dynamic calculation results are analyzed to determine the range of coupling resonance area,and the coupling resonance evaluation indicator is established.After analyzing the weighted acceleration RMS,peak value and its expansion coefficient calculation results,combined with the classification of coupling resonance types,the control factors,morphology,characteristics and influencing range of coupling resonance are summarized.Secondly,the initial angle,wavelength,amplitude,main parameter change of speed and weighted acceleration RMS of flatness control type affecting driving comfort are calculated,and the range of initial angle affecting weighted acceleration root mean square is calculated.The relationship between wavelength change and weighted acceleration RMS under each representative vehicle speed condition is improved.The linear and multiple parabolic function relationships of amplitude,vehicle speed and weighted acceleration RMS are determined by regression.Finally,the relationship between the radius of the vertical curve and the RMS of the weighted acceleration and its expansion coefficient under the condition of mutual interference coupling resonance is studied,and the two are parabolic functions.The result shows that(1)it is shown that the main control factors of coupling resonance affecting driving comfort are the frequency and amplitude of flatness;(2)as the speed decreasin

关 键 词：道路工程 耦合共振 动力学 平整度 纵断面线形 

分 类 号：U412[交通运输工程—道路与铁道工程]