A railway vehicle multibody model for real-time applications

An integrated approach for the optimization of wheel–rail contact force measurement systems

“…As a consequence, in the optimization of r 1 and r 2, nine FEM simulations have to be performed, in which both the applied forces and the position of a single contact point are changed. Values of applied forces X, Y, and Q in the three loading conditions N 1 , N 2 , and N 3 are chosen according to realistic operating conditions [6][7][8]. Tables 1, 2 shows the values of the relative percentage error of Y measurements e ij , which is defined as…”

Review Paper on Fabrication to Improve Process Planning In Rail Bogie

“…Meli et al [12] has developed a numerical model which reproduce the complete three-dimensional dynamics of a railway vehicle running on a generic track. The model has been developed with the objective of real-time implementation, in order to use the results to control the actuators of Hardware In the Loop(HIL) test rigs.…”

“…The main problem encountered in when using the elastic approach, is the determination of the contact points. For sake efficiency, the three dimensional contact problem is usually reduced to a two dimensional problem [12] when searching for the contact points. In the dynamic analysis of railway vehicles, the evaluation of the wheel-rail contact forces is repeated many times.…”

“…In the contact model used by E. Meli et al [12] the contact point position is calculated offline by means of a procedure based on the simplex method. This procedure was used to generate a three dimensional lookup table used in the real-time simulation to find the position of the contact points as a function of wheelset-rail relative displacement, described by three coordinates (the lateral wheelset displacement, the roll and yaw wheelset angle).…”

Prediction of Process Planning By Reorganised Machining Operation Timing of LHB Bogie

“…The method developed in the mentioned investigation exploits features of multibody computational algorithms that allow adding arbitrary first order diff erential equations. Meli et al [7] the contact point position is calculated offline by means of a procedure based on the simplex method. This procedure was used to generate a three dimensional lookup table used in the real-time simulation to find the position of the contact points as a function of wheelset-rail relative displacement, described by three coordinates (the lateral wheelset displacement, the roll and yaw wheelset angle).…”