Analyst Certification of the American AAR WABL Committee for PJM strength calculations

PJM now also offers wheelset expertise for the leading rail freight country, the USA. The AAR WABL Committee (Association of American Railroads) has voted to approve PJM for performing strength calculations of wheels according to the S-660 and S-669 standards. This new area of expertise is also already in use on a project. "We are very pleased that we can now also offer our customers this consultancy service for the use of rail vehicles in North America," explains Martin Joch.

In the field of wheelsets, PJM has built up profound know-how over the years. Here, too, the link between calculation and testing plays a major role. The expertise includes calculations as well as the design of instrumented wheelsets.

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PJM-Engineering-Radsatz

S-Bahn Berlin: PJM finished approval tests of new suburbal trainset

The suburban fleet of S-Bahn in Berlin will be modernised from 2021 on. 382 new vehicles will provide more comfort, light and safety. 2015, the consortium Siemens Mobility GmbH and Stadler Pankow GmbH started to develop a new trainset "DB 483 and 484". For these new trainsets, PJM was in charge of the approval tests in the fields of fatigue strength, structural requirements of railway vehicle bodies and torsional vibrations of the wheelsets. A complex projekt like this reqires a many years' experience of worldwide projects of an accredited testing facility.

These figures show the complexity of this project:

  • Periods of test runs: 10 weeks
  • Generated data from the test runs: 2 terabytes
  • 30 telemetry channels and 400 measurement channels

 

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