PEAM (Principal Energy Absorption Mechanism) has the function of decelerationg the train and absorbing most of the kinetic energy in order to guaratee the occupant protection, energy absorption level and no separation of the attachments of any structural members of the train coping with the USA standards (APTA). The paper shows the main trade-offs conducted during the PEAM design and the project philosophy for the structure full validation after tests specimens. This alternative principal energy absorption mechanism is validated with a 2/5 scale specimen crash test. The Pam-crash simulation model is correlated with the 2/5 scale test. Cab Car Structure for the ISA intercity train is developed complying with passive safety requirements (USA Market). An optimized PEAM design is obtained complying energy absorption capabilities and manufacturing constraints. A correct load transfer is achieved with loads limited to avoid cabin compartment permanent deformations. The design of the PEAM (Principal Energy Absorption Mechanism) is validated with a scale model. The approach of a reduced scale dynamic sled test is applied to the PEAM as very low cost solution and well suited for FEM validation. The PEAM FEM is correlated with test results, defining a rupture criterion in some elements and modeling the welding lines. The Pamcrash simulation is conservative, being the real PEAMs stiffness higher and absorbing more energy than the PEAMs in the simulation. The explicit analysis of the CABCAR is updated with the new model of the PEAM, including rupture criteria and welding lines representation. It must be noted that the scale of the manufacturing process is very important, the influence of the welding lines in a scale specimen is more critical than in a full scale specimen. This effect can give false critical points in a scale specimen.


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    Talgo train

    Gruitch, J.M. / Philips, O.H. | Engineering Index Backfile | 1950


    Talgo train

    Gruitch, J.M. / Philips, O.H. | Engineering Index Backfile | 1950



    Dossier: TALGO

    Ordóñez, José Lui | IuD Bahn | 1996