Dear Zbigniew
Thanks for your help. I would appreciate if you could mail me a
copy of your paper which looks very interesting. For your
information, I will forward an interesting response that I got from
New Zealand.
On 19 Oct 00, at 13:13, Lozia Zbigniew wrote:
> Dear Prof. OBrien,
>
> We haven ready 3d road roughness profile model together with associated
> software, including bicubic spline interpolation.
> The model is based on ISO recommendations and coherence function
> published in book by Prof. M. Mitschke.
> Example of such generated profile you will find in our paper:
> Lozia Z., Stegienka I., Biaxial vehicle motion simulation and
> animation. The Dynamics of Vehicles on Roads and on Tracks (ed. L.
> Segel). Supplement to Vehicle System Dynamics, Volume 25. Swets &
> Zeitlinger B. V., Lisse, 1996. pp 426-437.
> Some text from my another publication:
> "Road profile
> For two simple vehicle models, the road surface irregularities are
> described in space co-ordinate x or in frequency (wave number) domain
> using the power spectral density (PSD). For the complex vehicle model,
> the road surface irregularities have a determined 3D form and may also
> be the realisation of a stationary Gaussian random process describing
> real road according to the ISO recommendations. The road of a given
> class is described by vertical irregularities PSD of the longitudinal
> track and coherence function of parallel tracks. Fig. 5 presents an
> exemplary realisation of the road profile."
>
>
> I cant enclose you the example picture because of r-t-t mailbase memory
> limitation.
>
> Regards
>
> Zbigniew Lozia
>
> ------------------------------------
>
> Zbigniew LOZIA, D.Sc., Ph.D.
> Warsaw University of Technology
> Faculty of Transportation
> Koszykowa Str 75
> 00-662 Warsaw , Poland
>
>
>
>
> Eugene OBrien wrote:
>
> > 3-D Road Profile
> >
> > We are preparing a computer model of truck runs on a short
> > (100m) stretch of pavement and would like to allow for the effect of
> > transverse variations in the truck position in the tracks. We would
> > welcome information/references on typical relationships between
> > closely spaced parallel road profiles. Alternatively, typical road
> > profile data in 3-D would solve the problem.
> >
> > Eugene OBrien
> > Professor of Civil Engineering, University College Dublin, Ireland
>
>
>
Eugene
Department of Civil Engineering, University College Dublin,
Earlsfort Terrace, Dublin 2, Ireland
Tel: +353-1-706 7341 Fax: +353-1-706 7399
Visit our website - http://www.ucd.ie/~civileng/
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|