TY  - JOUR
PY  - 2010//
TI  - Category of derailment mechanism and prevention for high-speed vehicles
JO  - Journal of transportation engineering
A1  - Wang, Weixu
A1  - Li, Guixian
SP  - 730
EP  - 737
VL  - 137
IS  - 10
N2  - Vehicle derailment is difficult to explore because accidents are caused by many factors. In this paper, derailment behaviors are divided into three categories: friction-type derailment, structure-type derailment, and nonlinear-type derailment. Each category has unique characteristics. Wheel climb is a frequent form of friction-type derailment, resulting from mechanical and generally dynamical behavior between wheel and rail. Dynamic simulation is an important tool for prediction of friction-type derailment. There exists a critical point during wheel climb, and lateral normal force primarily prevents the wheel's moving up. Structure-type derailment is a result of component failure, appearing as local, then developing into general derailment. Factors affecting the development process, such as failure modes, front wheelset derailment, and vehicle speed, are discussed. Nonlinear-type derailment commonly occurs as impact derailment when the vehicle loses stability beyond a nonlinear critical speed. The critical speed for derailment is derived, and the case of a bifurcation diagram is studied. Although nonlinear-type derailment is sensitive to initial conditions, the possibility of accurate prediction is discussed.<p />  <p>Language: en</p>
LA  - en
SN  - 0733-947X
UR  - http://dx.doi.org/10.1061/(ASCE)TE.1943-5436.0000252
ID  - ref1
ER  -