Vehicle Gauge Analysis Of 200km/h Passenger Car Under Condition Of Anti-Roll Bar Failure

With the further increase of speed of the passenger train in China, the security problem of the vehicle gauge becomes more prominent. When the vehicle operates on the track, the vehicle vibration is caused by the excitation from the track, which in turn causes the track vibration. Both of the vibrations are in the state of mutual coupling and encouraging, which ultimately influences the vehicle gauge. The traditional way is to calculate the vehicle gauge only considering the vibration from the vehicle system. It exists a certain limitation. Moreover, with a steady increase of the vehicle speed, the vibration of the wheel-rail system is intensified, thus, the analysis methods which are based on the static and quasi-static cannot completely meet the dynamic requirements on the existing speed-up or high-speed railway. Besides, the current vehicle gauge calculation methods here and abroad consider the basic factors and also add excessive margins. The results of them are conservative and have too wide range of the vehicle gauge. The methods also result in higher construction price and the unnecessary waste in engineering progresses. Therefore, a new calculation method of vehicle gauge is proposed by comparing and analyzing the differences of the management standards here and abroad. This method is in accordance with the vehicle-track coupled dynamics theory. This thesis applies the aforementioned method and analyzes the vehicle gauge under the different operation situations when the passenger car is at the speed of 200km/h on the speed-up railway. It uses the track irregularity PSD measured from China’s certain trunk railway as the excitation input.Firstly, the thesis briefly introduces the current research situation of vehicle gauge at home and abroad. According to the current national gauge standard, the thesis gives out respectively the standard of vehicle gauge GB 146.1-83 and structure gauge GB 146.2-83, as well as calculates the allowable maximum manufacturing width reduction on the basis of the 200km/h passenger specific vehicle parameters. According to the reduction, the calibration standards of passenger vehicle static gauge and manufacturing gauge are established, meanwhile, the inner and outer widening value of structure gauge criterion on the different radius of curved tracks are calculated. And then, the thesis gives respectively the dynamic gauge check criteria on the different radius of curve tracks.On the basis of comprehensive analysis of static gauge, the author applied the data preprocessing method and studied the calculation method of the 200km/h passenger vehicle static gauge, and then drew the largest profiles of manufacturing gauge and static gauge, thereby compared with the abbreviated existing railway’s vehicle gauge standard.Applying the system of TTISIM simulation, the thesis analyzes the gauge security problems based on the features of wheel-rail system’s dynamic responses when the railway vehicle with varied speeds passes the tangent track of existing speed-up railway. Besides, aiming at different radius of curve tracks, it checks the gauge security problems when the railway vehicle passes the curve track with different speeds. The results show that when the railway vehicle passes the tangent track, the vehicle dynamic envelope enlarges as speed increases. The vehicle gauge is secure when the railway vehicle at the speed of 160km/h, 180 km/h,200km/h. When the railway vehicle passes the curve track with a radius of 300m, the vehicle gauge is secure when the railway vehicle at the speed of 60 km/h,80 km/h,100 km/h. With a radius of 1000m, the vehicle gauge is safe when the railway vehicle at the speed of 80 km/h,100 km/h,120 km/h. With a radius of 3000m, the vehicle gauge is safe when the railway vehicle at the speed of 120 km/h,160 km/h,200 km/h.In order to explore the vehicle gauge dynamic change status of 200km/h passenger car under anti-roll bar failure condition. For the tangent track, the thesis compared and analyzed the difference of vehicle dynamic envelope with the anti-roll bar failure of the vehicle back and forth. For the different radius curve tracks, it also compared and analyzed the difference under aforementioned situations. The result shows that on the tangent track, the range of vehicle dynamic envelope becomes larger with the anti-roll bar failure and it has not too much influence on the displacement of car-body. On the curve track, the vehicle dynamic envelope biases larger with the anti-roll bar failure of the vehicle and it has great influence on vehicle displacement. With the radius grows, the influence decreases.When the passenger car with the anti-roll bar failure operates at different speed on the curve track, the thesis also analyzes the vehicle dynamic envelope under that situations. For different radius of curve tracks, considering the vehicle gauge standard as the scrutiny, the safe speed of railway vehicle under the aforementioned condition is analyzed. The result shows that after the failure of rolling resistant torsional bar, the safe speed of vehicle is 80km/h when the railway vehicle passes the track with 300m of curve radius and 120mm of super elevation. When the vehicle passes the track which has 1000m of curve radius and 100mm of super elevation, the safe speed of vehicle is 140km/h. With 3000m of radius and 90m of super elevation, the safe speed of vehicle is 225km/h.