Modelování a identifikace materiálových a stavových parametrů rychlých rázových dějů

Abstract

The subject of the dissertation thesis is computer modelling of demanding dynamic tests of railway seats. The identification of material and state factors that significantly affect the seat certification process is presented in the first chapter of the work. On the basis of the identified factors, the relevant material tests, shear friction tests, and especially spot weld tests are performed. Furthermore, the detailed computer model of dynamic tests is developed, debugged, and verified using the results of a series of laboratory tests. Attention is also paid to the efficient solution of the task and its scalability on supercomputers. In this work, the seat pitch and the acceleration influence on passengers safety are studied and analysed using the parametric studies. Finally, the original combined injury criterion is defined to measure the level of safety among many various seat types. This complex work solves problems of the technical practice, namely the certification of two regional and one long-distance seat, including the implementation of a foldable table. The validated procedures are developed to objectively evaluate the injury criteria obtained by computer modelling of dynamic tests.