File:Heumanns method for 2axle bogie.png
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English: Heumann´s theory applicated on a two axle bogie. Moment of steering force P must be balanced with the moments of friction forces on each wheel T. The task is solved graphically. S´ is estimated centre of rotation of the bogie, q1 and q2 are levers of friction forces T. In upper part is a curve as function of the sum q1 + q2 and it responds to the moments of friction forces which depend on the position of the rotation centre. The line from the middle of the first wheelset touches the curve in the point, which determines the real position of the centre of rotation of the bogie - point S. Based on http://www.fce.vutbr.cz/zel/plasek.o/studium/1_Vozidlo_kolej.pdf
Čeština: Heumannova grafická metoda vyšetření velikosti řídící síly a středu otáčení podvozku při průjezdu obloukem. S´ je obecná (možná) poloha středu otáčení podvozku, q1 a q2 ramena třecích sil T mezi kolem a kolejnicí. Křivka v horní části je součtem q1+q2 v závislosti na poloze S´ a vyjadřuje tak moment potřebný k natočení podvozku, pokud má být střed otáčení v daném bodě S´. Tečna k této křivce, která prochází středem prvního dvojkolí je vyjádřením momentu řídící síly P. Bod dotyku obou křivek udává polohu skutečného středu otáčení podvozku při průjezdu obloukem. Zdroj: http://www.fce.vutbr.cz/zel/plasek.o/studium/1_Vozidlo_kolej.pdf |
| Date | |
| Source | Own work according to: Nejepsa, R.: Kolejové vozy, část II. – Vozidlo a kolej, SNTL Praha 1956 |
| Author | PetrS. |
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| current | 20:15, 30 January 2010 | | 864 × 1,205 (626 KB) | PetrS. (talk | contribs) | {{Information |Description={{en|1=Heumann´s theory applicated on a two axle bogie. Moment of steering force P must be balanced with the moments of friction forces on each wheel T. The task is solved graphically. S´ is estimated centre of rotation of the |
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