Research On Dynamic Performance Of The Rubber Tire And Slide Way Tram

With the rapid development of our cities, the traffic pressure is increasing. Only road traffic Could not meet the people’s travel demand, so the trend of our traffic system construction is hierarchical and diversity. The modern tram would play an important role in our society. It is a medium quantity rail transport which is among BRT, LRT and subway. The modern tram could be divided into two kinds:steel-wheel tram and rubber wheel and slide way tram. Compared to the traditional steel-wheel tram, the steel-wheel tram was characterized by the slight vibration, good riding comfort. And it can negotiation small radius curve, reducing the influence on the roadside buildings and inhabitants. Its climbing ability is strong, then can be suitable for urban complex traffic route. These qualities recommended the rubber wheel and slide way tram to favorite by the people.Firstly this paper expatiates history of the development and application of the urban tram, and compare the two kinds of the modern tram especially for the bogie structure, the hinge mode between adjacent vehicles, the guiding principles of motor bogie and non-motor bogie. Then those influences by the later force, normal force, longitudinal force, return moment, rolling resistance moment and rolling moment are analyzed. With the rubber wheel and slide way tram’s structural characteristics, the cornering model and the radial modal of the rubber tires of the rubber wheel and slide way tram are built. Meantime, the force condition of the rubber tires influenced by the longitudinal slips is considered in the two modal. According to the traditional theory of simulation and analysis of multi-body dynamics, the rubber wheel and slide way tram’s force condition is analyzed, and the dynamics differential equation was obtained, mainly aimed at the ends of the carbody, the middle carbody and the non-motor bogie frame. The dynamic simulation model of the vehicle is built in the multibody dynamics software SIMPACK, and the subordinate factors are simplified. Meantime, the dynamic standards of the rubber wheel and slide way tram are made based on the automobile’s dynamic and the wheel-rail dynamic assessment standard. Then, the structure of guiding system of the motor bogie is analyzed in detail. In order to inspect the reasonability of the structure of the guiding system, the mathematic model and the dynamic simulation model of the guiding system are built. Therefore the wheel angle relationship between the right and left rubber tires could meet the principle of Ackerman, then the right and left rubber tires stay pure rolling motion with small slipping and are less wear. At the end, the dynamic performance of the rubber wheel and slide way tram in the normal condition, the ice and snow pavement condition, the blow-out condition. The results show that the rubber tire and slide way tram has good ride comfort in the straight line and excellent passing ability then the vehicle negotiates the curve in normal condition. Under the ice and snow pavement condition, the riding comfort indexes of the vehicle have little difference from that of the normal condition in the straight line. When the rubber tire and slid way tram negotiates the curve in ice and snow pavement condition, the roll angles of different carbodys all increase obviously, but not exceed the limits, and the side-slip angles of the rubber tire increase too, even exceed the limiting value, then the side slip of the vehicle would occur and the speed of the vehicle should lower. Under the blow-out condition, the riding confort performance of the vehicle is excellent at 35km/h. so when one of the rubber tires blow out, the vehicle can still run at 35km/h and the riding comfort couldn’t lower.