Triennial Report 2003 - CHARMEC

Interaction of train and track – Samverkan tåg/spår (TS) – Wechselwirkung von Zug und Gleis – Interaction entre le train et la voieTS8. INTEGRATED TRACK DYNAMICSIntegrerad spårdynamikIntegrierte GleisdynamikDynamique intégrée de la voieProject leaderDocent Jens Nielsen,Applied MechanicsCo-workerProfessor Tore Dahlberg,Linköping Instituteof TechnologyPeriod 2003-10-01 – 2006-06-30Chalmers budget Stage 4: ksek 1500(excluding universitybasic resources)Industrial interests Stage 4: ksek 500+100in-kind budget (Banverket+Abetong Teknik)A general tool for the rational design of the track andits components will be established in the ts8 projectbased on the results of earlier and new research. Oneaim is to broaden the application of our computer programsdiff and diff3d better to handle frequenciesbelow 50 Hz. New long-term and recurrent measurementsof track stiffness and rail roughness are foreseen.A model for track settlements will be integrated withdiff. The behaviour of the traditional monobloc sleeperwill be compared to that of so-called twin-block, ladder,winged and booted sleepers and to that of a slab-track.A project plan dated 2003-06-02 was approved by thecharmec Board on 3 June 2003. It is planned that onlysenior researchers be engaged in the ts8 project.For photos of Jens Nielsen and Tore Dahlberg,see pages 19 and 54Interaction of train and track – Samverkan tåg/spår (TS) – Wechselwirkung von Zug und Gleis – Interaction entre le train et la voieTS9. TRACK DYNAMICS AND SLEEPERSSpårdynamik och sliprarGleisdynamik und SchwellenDynamique de voie et les traversesProject leadersand supervisorsProfessorThomas Abrahamsson andDocent Jens Nielsen,Applied MechanicsDoctoral candidate Ms Johanna Lilja, MSc(from 2004-02-09)Period 2004-01-01 – 2006-06-30(– 2008-12-31)Chalmers budget Stage 4: ksek 1825(excluding universitybasic resources)Industrial interests Stage 4: ksek 500in-kind budget(Abetong Teknik)settlements and the optimal shape of a sleeper. It isplanned that a stochastic approach to the modelling ofsubgrade, ballast and traffic be used and that a probabilisticdesign method for sleepers be developed. Therequired statistical properties will be deduced from testdata. An optimization may be carried out by use of diff(see under project ts1), which will be further developedto handle stochastic variations. A project plan dated2003-06-02 was approved by the charmec Board on3 June 2003.For photos of Thomas Abrahamsson, Jens Nielsen andJohanna Lilja, see pages 16, 19 and 21The ts9 project will focus on the design loads for asleeper installed in a track carrying different types ofrailway traffic. The results from earlier charmec projectswill be exploited and new in-field measurementsperformed. Important issues are the true contact loadon the sleeper from the ballast, the influence of ballastPhD student Martin Petersson of project VB2 (see next page).Photo taken 200022