建模方式对调车冲击仿真的影响研究

Research on the Influence of Modeling Method on the Simulation of Shunting Impact

为了研究不同建模方式的仿真模型对调车冲击计算效率和结果的影响,根据C80敞车及MT-2缓冲器参数,建立模拟调车冲击工况的纵向动力学模型A、三维精细化模型B和混合动力学模型C,分析了在不同速度、空重车状态及不同编组方式下的调车冲击的响应结果,并在此基础上讨论了模型的建模方便性、计算效率等问题.研究结果表明:(1)随着冲击速度的增加,三种模型得到的最大车钩力变化趋势一致,但是结果差异越来越大,在8km/h时仿真差异可达15%,同时空车状态下分析的结果最大差异为8.9%,大于重车状态仿真的2.4%;(2)不同编组方式得到的车钩力时间历程规律类似,在不同车钩位置上比较时最大差异为8%左右;(3)建模方便性上各有难点,但模型A的数据库在界面调用更为方便,且在计算时间上远远小于其他两种模型.

In order to study the influence of simulation models with different modeling methods on the calculation efficiency and results of shunting impact,longitudinal dynamics,three-dimensional refined and hybrid dynamics were established to simulate the shunting impact condition according to the parameters of C80 convertible and MT-2 buffer,and the response results of shunting impact under different speeds,empty heavy vehicle states and different marshing modes were analyzed.On this basis,the modeling convenience and computational efficiency of the model are discussed.The results indicate that:(1)With the increase of impact velocity,the maximum coupler force obtained by the three models changes in the same trend,but the difference between the results becomes larger and larger.For example,the simulation difference can reach 15%at 8km/h;At the same time,the maximum difference of analysis results under empty condition is 8.9%,which is larger than the simulation results under heavy condition of 2.4%.(2)The time history of coupler force obtained by different grouping methods is similar,and the maximum difference is about 8%in different coupler positions.(3)There are difficulties in the modeling convenience,but the database of model A is more convenient to call on the interface,and the calculation time is much less than that of the other two models.