Abstract
A vehicle-track system dynamic model, including multipoint contact wheelset vibration equations, is built to carry out curve negotiation verification of a new calculation and decision method for wheel-rail multipoint contact─trace line extremum method. The position of curve negotiation contact points on the wheel tread, the number of wheel-rail contact points and the wheel-rail normal force are presented. The result shows that the trace line extremum method can solve the wheel-rail multipoint contact problem and obtain the accurate geometric parameters of wheel-rail multipoint contacts and the system vibration characteristics. When two-point contact of wheel flank root and wheel flank occurs, the result obtained by using multipoint contact method is more reasonable and reliable than that by using single-point contact method. If no simultaneous two-point contact of flank root and flank, the results by multipoint contact method and by single-point are almost in full agreement. Compared to the new wheel tread, the worn tread is easy to form two-point contact nearby the depression area of the nominal diameter position of wheel tread. The correctness and effectiveness of the new method are verified.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call