TY  - JOUR
PY  - 2012//
TI  - A third-order approximation method for three-dimensional wheel-rail contact
JO  - Vehicle system dynamics
A1  - Negretti, Daniele
SP  - 431
EP  - 448
VL  - 50
IS  - 3
N2  - Multibody train analysis is used increasingly by railway operators whenever a reliable and time-efficient method to evaluate the contact between wheel and rail is needed; particularly, the wheel-rail contact is one of the most important aspects that affects a reliable and time-efficient vehicle dynamics computation. The focus of the approach proposed here is to carry out such tasks by means of online wheel-rail elastic contact detection. In order to improve efficiency and save time, a main analytical approach is used for the definition of wheel and rail surfaces as well as for contact detection, then a final numerical evaluation is used to locate contact. The final numerical procedure consists in finding the zeros of a nonlinear function in a single variable. The overall method is based on the approximation of the wheel surface, which does not influence the contact location significantly, as shown in the paper.<p />
LA  - en
SN  - 0042-3114
UR  - http://dx.doi.org/10.1080/00423114.2011.595804
ID  - ref1
ER  -