Page 20 - 360.revista de Alta Velocidad - Nº 5
P. 20
De la Guerra, Eduardo
Figure 9. Eigen frequencies measured over the main frame of the carbody
In the Figure 9 a different accelerometer signal of the carbody can be seen, three Eigen
frequencies groups can be distinguished, 8-10Hz around 15Hz and a third group in the 20Hz
environment. With a more detail analysis is possible to extract shape modes (Figure 9b) and
detect each frequency in the groups.
The occurrence of frequencies in the vicinity of 8-10Hz is not obtained during the FE calculations
but appear due to the guidance system excitation as checked with the testing and Multibody
simulation.
5. R&D Projects
In addition to the customer project, different R&D projects are in progress regarding lightening
of the structures, Figure 10.
Figure 10. R&D Project map
18 360.revista de alta velocidad
