Reasonabal Fatigue Strength Design And Approval Of CRH5 Type E-MU Wheel-axle

Wheel and axle are critical components relative to railway transportation safety. In which, design and manufacture qualities are bases to assure service reliability and safety.But basic issues are there that existent code-based wheel design pays only attention on fatigue strength of wheel web and axle design only on free surface sections. Lots of wheel and axle failure phenomena are careless in production.Effort of present work focuses on summing up a frame work for railway wheel-axle design strength and approval, which can well perform ability checks on anti-failures in production developed by author's group. Key elements include in determination of design loads, construction on new finite element caculation methods, and approval methods on four kinds of wheel-axle failure analyses. Capacities can be checked on anti-deformation of wheel tread, anti-major stressing fatigue damage of axle freedom sections nearby wheelseats and jounals, anti-multiaxial fatigue damage of wheel rim, web and gub and axle sections at bounds fitted with bearings, and anti-rolling fatigue sheeling of wheel tread and cracking from sub-surfaces of axle pieces fitted with wheels.Applications are carried out to powered and non-powered wheel-axles of CRH5 type E-MU. The metioned capacities above are well and fluently practiced with design loads.This indicates that design ability has been improved on the existent code-based method.This may promote design code advantagement to provide a basis of assuring well design and manufacture qualities of railway wheel-axles.