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An extended analytical model including a layered

Anders Karlström (Institutionen för tillämpad mekanik, Dynamik) ; Anders Boström (Institutionen för tillämpad mekanik, Dynamik)
Environmental Vibrations, ISEV2005 p. 303-310. (2005)
[Konferensbidrag, övrigt]

Ground vibrations are investigated with an analytical approach. The ground is modelled as a layered half-space on which a layered embankment is placed. Situated on top of the embankment, the sleepers are modelled with an anisotropic Kirchhoff plate and the rails as Euler-Bernoulli beams. In the equation for the rails, propagating wheel loads with constant velocity are accounted for. The analyzing method is based on Fourier transforms in time and along the space coordinate parallel with the track. In the transverse direction Fourier transforms are adopted in the ground, whereas Fourier cosine and Fourier sine series are used in the embankment layers. The numerical scheme is very efficient. In particular the beam-like rectangular elastic region (embankment) is compared with the Euler-Bernoulli beam, both supported on a layered ground. With the same bending stiffness, the two solutions are seen to differ already from 0 Hz.

Nyckelord: analytical model, ground vibrations, embankment, railway



Denna post skapades 2006-01-19. Senast ändrad 2015-03-30.
CPL Pubid: 10189

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik

Ämnesområden

Fastkroppsmekanik

Chalmers infrastruktur

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