Lateral Stability of Railway Vehicles and New Contact Formulations
Paulo Roberto Refachinho de Campos1; Debora Naomi Higa1; Alfredo Gay Neto1
1 Polytechnic School at the University of São Paulo
doi:10.20906/CPS/CILAMCE2017-0146
Resumo
The present work has two main objectives: in the first part, classical governing equations for the lateral movement of a railway vehicle, developed by Carter in 1916, are introduced; its main hypotheses are discussed. In addition, the first method of Lyapunov is applied to determine the critical speed of a typical wheelset. Then, in the second part of the work, a rigid body model together with a contact formulation is employed to solve the same problem, namely "Master-Surface to Master-Surface Contact Formulation". Preliminary models are developed employing this new contact formulation and using simplified geometries. These models are intended to reproduce the so-called "hunting phenomenon", in a fully nonlinear environment. Although several further developments are required, the results are very promising.
Palavras-chave: Railway Vehicles; Hunting; Master-Master Contact