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Implementation of novel wear prediction methodology for damage calculation in rail vehicles
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Spårfordon.
2018 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

The discretisation of the track network and the operating conditions is an important part of a wear calculation. Due to computational cost representative track parts and conditions are selected to be simulated. The characteristic point method provides a set of simulation cases with different curvatures and non-compensated accelerations. The severity of wear as a function of curvature is considered by the energy dissipation between rail and wheel. Quasi-static multibody simulations with a Bo’Bo’ vehicle and ideal track are run in GENSYS. The normal forces are calculated with Hertz’ theory. The tangential contact problem is solved with FaStrip, a combination of FASTSIM and Strip theory. Wear is calculated with Archard’s formula. In order to simplify the implementation, wear is calculated only for one step of a full wear calculation without wheel profile updating. The result for the total wear depth over the wheel profile shows two peaks, at the flange and at the wheel tread. Further research should show the influence of using quasi-static instead of dynamics simulations with track irregularities.

sted, utgiver, år, opplag, sider
2018. , s. 66
Serie
TRITA-SCI-GRU ; 2018:270
Emneord [en]
Wear calculation, multibody simulation, Archard’s formula, FaSTrip, characteristic points, cumulative distribution function, isoparametric formulation
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-239043OAI: oai:DiVA.org:kth-239043DiVA, id: diva2:1263438
Examiner
Tilgjengelig fra: 2018-11-15 Laget: 2018-11-15 Sist oppdatert: 2025-02-14bibliografisk kontrollert

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