443 |
个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:吉林工业大学
学位:博士
所在单位:力学与航空航天学院
学科:动力学与控制. 工程力学
办公地点:工程力学系402
联系方式:Tel: 133-8788-8098
电子邮箱:zhaohuiq@dlut.edu.cn
Simulation of longitudinal dynamics of long freight trains in positioning operations
点击次数:
论文类型:期刊论文
发表时间:2012-09-01
发表刊物:VEHICLE SYSTEM DYNAMICS
收录刊物:SCIE、EI、Scopus
卷号:50
期号:9
页面范围:1409-1433
ISSN号:0042-3114
关键字:driving simulator; freight train; impact dynamics and mechanics; vehicle safety
摘要:Positioning operations are performed in a railway goods yard, in which the freight train is pulled precisely at a specific point by a positioner. The positioner moves strictly according to the predesigned speed and provides all the traction and braking forces which are highly dependent on the longitudinal dynamic response. In order to improve the efficiency and protect the wagons from damage during positioning operations, the design speed of the positioner has to be optimised based on the simulation of longitudinal train dynamics. However, traditional models of longitudinal train dynamics are not accurate enough in some aspects. In this study, we make some changes in the traditional theory to make it suitable for the study of long freight trains in positioning operations. In the proposed method, instead of the traction force on the train, the motion of the positioner is assumed to be known; more importantly, the traditional draft gear model with nonlinear spring and linear damping is replaced by a more detailed model based on the achievement of contact and impact mechanics; the switching effects of the resistance and the coupler slack are also taken into consideration. Numerical examples that deal with positioning operations on the straight lines, slope lines and curving lines are given.