Road profiles modelling
Summary
Research is focused on analysis and modelling of real longitudinal road profiles to improve description of longitudinal road profiles in frequency and spatial domain. Results are intended to be used in vehicle vibration modelling and testing areas.Objectives
The research activities are mainly devoted to:- Improve analytical description of longitudinal road profiles in frequency domain (power spectral density (PSD), coherence function) to reflect more accurately current road network properties;
- Propose the methodology of generation of longitudinal road profile with randomly distributed road distresses;
- Identify appropriate analytical model and parameters of road elevation PSD;
- Propose the method for extraction of road distresses from a raw road profile;
- Identify appropriate theoretical model of road distress dimensions’ (height, length, distance) distribution;
- Identify appropriate analytical model of road distress (bumps, potholes) shapes.
Achievements
- The analytical model of the coherence function between vertical displacements of longitudinal road profile in the left and right tracks was identified using a 3500 parallel tracks (Múčka IJVD, 2015);
- The optimal analytical approximation of road elevation PSD based on processing of real test sections was identified (Múčka JTE, 2012);
- Methodology of generation of artificial road profile consisting of a random component and a superimposed set of individual obstacles (distresses) was proposed based on Weibull distribution of distresses’ dimensions (Múčka and Kropáč JTestE, 2011);
- The parameters of road elevation PSD model based on processing of real test sections were identified (Múčka and Kropáč IJVSMT, 2009; Kropáč and Múčka IJVD, 2008);
- Analytical approximation of road distresses (bumps, potholes) shape was identified based on processing of 16,590 road features (Kropáč and Múčka SaV, 2011).
Generated artificial road profile with superimposed road distresses – hO (pure distress part), hR (pure random part), and hRO (road profile with distresses)Additional reading
MÚČKA, Peter. Model of coherence function of road unevenness in parallel tracks for vehicle simulation. In International Journal of Vehicle Design, 2015, vol. 67, no. 1, p. 77 - 97. (0.405 - IF2014). (2015 - Current Contents). ISSN 0143-3369.MÚČKA, Peter. Longitudinal road profile spectrum approximation by split straight lines. In Journal of Transportation Engineering, 2012, vol. 138, no. 2, p. 243-251. (0.620 - IF2011). (2012 - Current Contents, WOS). ISSN 0733-947X.
MÚČKA, Peter - KROPÁČ, Oldřich. Simulation of obstacles in a longitudinal road profile based on the Weibull distribution. In Journal of Testing and Evaluation, 2011, vol.39, no.3, p.335-345. (0.409 - IF2010). (2011 - Current Contents). ISSN 0090-3973.
KROPÁČ, Oldřich - MÚČKA, Peter. Shapes of obstacles in the longitudinal road profile. In Shock and Vibration, 2011, vol.18, no.5, p.671-682. (0.260 - IF2010). (2011 - Current Contents). ISSN 1070-9622.
KROPÁČ, Oldřich - MÚČKA, Peter. Specification of obstacles in the longitudinal road profile by median filtering. In Journal of Transportation Engineering ASCE, 2011, vol.137, no. 3, p.214-226. (0.460 - IF2010). (2011 - Current Contents). ISSN 0733-947X.
MÚČKA, Peter - KROPÁČ, Oldřich. Properties of random component of longitudinal road profile influenced by local obstacles. In International Journal of Vehicle Systems Modelling and Testing, 2009, vol.4, no.4, p.256-276. ISSN 1745-6436.
KROPÁČ, Oldřich - MÚČKA, Peter. Indicators of longitudinal unevenness of roads in the USA. In International Journal of Vehicle Design, 2008, vol. 46, no.4, p.393-415. ISSN 0143-3369.