弯道路段货车复杂运动惯性荷载特性与机制研究  

STUDY ON FORMATION MECHANISM AND CHARACTERISTICS OF INERTIA LOAD OF TRUCK IN CURVED ROAD SECTIONS

作　　者：胡昌斌[1] 林淼 童生豪 HU Chang-bin;LIN Miao;TONG Sheng-hao(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《工程力学》2024年第8期185-200,共16页Engineering Mechanics

基　　金：国家自然科学基金项目(51978172)。

摘　　要：弯道路段货车运动惯性荷载具有显著的振荡冲击特性,基于车辆多体系统TruckSim动力学仿真方法结合货车荷载现场试验,定义了5类标准弯道类型和荷载特性表征参数,重点对弯道类型、半径、车速和驾驶行为等因素组合对运动惯性荷载的影响开展了研究。研究显示弯道路段货车运动惯性荷载具有分岔、多种运动模式和振荡效应等复杂特性以及偏载、荷载多向组合和冲击基本特性。分岔特性是弯道路段最重要的荷载特性,与车辆速度、弯道半径和超高存在复杂的耦合关系,且具有临界速度效应。弯道路段车辆存在侧向运动、侧倾运动和横摆运动等多种运动模式,并通过悬架弹簧诱发产生复合运动惯性冲击荷载,对于S型、同向型、反向型和广义型弯道存在纵向加减速、制动运动以及多次摇摆运动,且在出弯后荷载具有振荡效应。分岔行为、偏载和过大惯性冲击是诱发弯道路段过早复杂破坏模式和磨损的主要成因,并给出了荷载分岔计算方法、偏载、竖向和水平侧向冲击系数值域,以期为路面设计和管理提供支持。The motion inertia load of truck in curved road sections has significant oscillation and impact characteristics.Based on the dynamic simulation method by TruckSim and the field test of truck load,five types of standard curved road sections and load characteristic parameters were defined.The influence of the combination of curve type,radius,vehicle speed,and driving behavior on the motion inertia load is mainly studied.The research shows that the inertial load of truck in curved road sections has complex characteristics such as bifurcation,multiple motion modes,and oscillation effects,and basic characteristics such as eccentric loading,multi-directional combination of loading,and impact.Bifurcation is the most important load characteristic in curved road sections,which has complex coupling relationship with vehicle speed,curve radius and superelevation,and has critical speed effect.There are many kinds of motion modes such as lateral motion,roll motion,and yaw motion in curved road sections,and the inertial impact load is induced by the suspension spring.There are longitudinal acceleration and deceleration,braking motion,and multiple sway motion for the S-type,isotropic type,reverse type,and generalized type,and the load has oscillation effect after the curve is out.Bifurcation behavior,eccentric load,and excessive inertia impact were the main causes of premature and complex failure mode.The calculation method of load bifurcation,the value range of eccentric load,vertical and horizontal lateral impact coefficient were proposed to provide supports for pavement design and management.

关 键 词：道路工程 弯道路段 运动惯性荷载 形成机制 荷载特性 

分 类 号：U416[交通运输工程—道路与铁道工程]