Design of Grid Reference System for Numerical Simulation of Roof Device of High Speed Trains

Abstract

In the design of the roof device of high speed trains, numerical simulation is the most common method because of the special reason why the direct effect wind tunnel test can’t be carried out. The device monomer is used as the reference system, the simulation is carried out in the grid domain where the train speed is the inflow velocity. This method can’t reflect the airflow influence of the equipment in the actual working condition. Because the device manufacturer's research and development cost is limited, and the device manufacturer does not have the data of whole train. So the numerical calculation of the three trains marshalling system can’t be applied actually. So it is necessary to set up a convenient and reliable method of setting up the grid reference system for the numerical simulation of the roof device of high speed trains. In this paper, based on the numerical simulation of the detection for pantograph system of train roof, the same type of operation, the same algorithm, the same grid scale, and a variety of reference systems are compared. According to the calculation results of each scheme, the finite element model establishment time, the grid scale and the computation time four aspects performance. Finally, a feasible, economical, convenient, reliable and effective numerical simulation for the roof components of high speed trains is obtained, which provides a reference for the design and development of roof device of high speed trains.