基于车桥耦合振动的公路梁桥行车舒适性分析  

Analysis on Driving Comfort of Highway Beam Bridge Based on Vehicle-Bridge Coupling Vibration

作　　者：陈水生[1] 葛世祺 桂水荣[1] 赵辉 Chen Shuisheng;Ge Shiqi;Gui Shuirong;Zhao Hui(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013

出　　处：《华东交通大学学报》2023年第1期1-9,共9页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(12062006)。

摘　　要：鉴于梁式桥行车舒适性差的特点,为探究过桥车辆在公路梁桥行驶过程中的乘坐舒适性,以一座梁式桥为分析对象,基于车桥耦合振动理论,进一步建立车桥耦合振动微分方程。采用自编车桥耦合MATLAB程序计算车辆座椅加速度,以国际标准ISO2631-1的加速度均方根值评价方法对司乘人员乘坐舒适性进行评价,分析车辆类型、乘坐位置、车重、桥面不平顺、车速等因素对车辆乘坐舒适性的影响。结果表明:不同的车辆类型,小汽车的行车舒适性优于货车和公交车;多排座椅的两轴公交车,前排座椅的乘坐舒适性比后排座椅的乘坐舒适性好且座椅距离车辆质心位置越远,乘坐舒适性就越好;不同乘客处于同排位置,站立乘客的舒适性要比座椅乘客的舒适性差;车辆乘坐舒适性对桥面路况等级很敏感,其随桥面路况的恶化而迅速降低;不同的车重,车辆乘坐舒适性随车重的增加而提高;车辆行驶速度对乘坐舒适性有一定的影响,但影响较小,为提高乘坐舒适性,建议对梁式桥的行驶车辆采取限速措施。In view of the characteristics of the poor driving comfort for beam bridges,to explore the passing vehicle ride comfort in the process of driving on the highway bridge,a vehicle-bridge coupling vibration differential equation was established with a beam bridge as the analysis object,based on the theory of vehicle bridge coupling vibration.The seat acceleration of the vehicle was calculated by using the self-programmed vehicle bridge coupling MATLAB program,and the ride comfort of the driver and passenger was evaluated by the international standard ISO2631-1 root mean square acceleration value evaluation method.The influences of vehicle type,seat position,vehicle weight,bridge surface roughness,speed and other factors on the ride comfort of the vehicle were analyzed.The results show that the driving comfort of cars is better than that of trucks and buses for different vehicle types.For a two-axle bus with multiple rows of seats,the ride comfort of the front seat is better than that of the back seat in different riding positions,and the farther the seat is from the vehicle centroid,the more comfortable the ride is.If different passengers are in the same row,the comfort of standing passengers is worse than that of seat passengers.Vehicle ride comfort is very sensitive to bridge deck road condition,and it decreases rapidly with the deterioration of bridge deck road condition.For different vehicle weight,vehicle ride comfort increases with the increase of vehicle weight.Vehicle speed has a certain influence on ride comfort with less effect.It is suggested that beam bridge vehicle speed limit measures be taken in order to improve the ride comfort.

关 键 词：行车舒适性 车桥耦合 Newmark-β算法 加速度均方根值 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]