Oscilacije in vibracije v železniškem prometu

diplomska naloga

Jure Raspor (Author), Bogdan Zgonc (Mentor), Janko Logar (Thesis defence commission member), Marijan Žura (Thesis defence commission member), Darja Šemrov (Co-mentor)

Abstract

Keywords

gradbeništvo;UNI;diplomska dela;železniški promet;oscilacije;vibracije;rebričenje tirnic;omejevanje vibracij;podplati pod pragi;

Data

Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[J. Raspor]
UDC:	656.2(043.2)
COBISS:	6448737
Views:	3088
Downloads:	598
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Oscillations and vibrations in railway traffic
Secondary abstract:	The thesis treats a problem of oscillations and vibrations which take rise in railway traffic. Incipient chapters cover the basis of theory of vibration as well as describe elements presented in railway superstructure, that have a significant influence on the occurence and propagation of vibration. Thereafter the wheel-rail contact and different types of vibrational sources, due to rail and wheel irregularities, are described in greater detail. Procedure implementation of vibration measurement as well as effects of train-induced vibration are also briefly discussed. Major portion of contents is focused on mitigating measures, with a great emphasis on under-sleeper pads. Based on the simple dynamic model of a train-track system, displacements, velocities and accelerations, which represent approximate values of oscillations, that can be anticipated in such system, are calculated in the end. Model is designed as a single degree-of-freedom system and represents movement of a damped mass element with constant speed on a sine curved grounding. Based on the results, that are graphically represented in diagrams, one can conclude, how the values of oscillations are dependant on geometrical parameters of rail corrugations, speed of train and mass of a carriage.
Secondary keywords:	graduation thesis;civil engineering;railway traffic;oscillations;vibrations;rail corrugation;vibration mitigation;under sleeper pads;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XI, 93 str.
Type (ePrints):	thesis
Title (ePrints):	Oscillations and vibrations in railway traffic
Keywords (ePrints):	železniški promet;oscilacije;vibracije;rebričenje tirnic;omejevanje vibracij;podplati pod pragi
Keywords (ePrints, secondary language):	railway traffic;oscillations;vibrations;rail corrugation;vibration mitigation;under sleeper pads
Abstract (ePrints):	Diplomska naloga obravnava problem oscilacij in vibracij, ki nastajajo v železniškem prometu. V začetnih poglavjih so na kratko opisane osnove teorije vibracij ter sestavni deli zgornjega ustroja, ki pomembno vplivajo na nastanek in širjenje vibracij v okolico. V nadaljevanju je podrobno opisan stik kolesa in tirnice ter različni tipi izvorov vibracij, ki so posledica geometrijskih nepravilnosti na tirnici in kolesu. Na kratko so opisani tudi postopki izvajanja meritev vibracij ter vpliv, ki ga imajo vibracije povzročene s strani železniškega prometa na človeka. Večja pozornost je namenjena predstavitvi ukrepov za omejevanje vibracij, s posebnim poudarkom na poliuretanskih podplatih pod pragi. Na koncu so, na podlagi enostavnega dinamičnega modela sistema vlak-tir, izvedeni izračuni pomikov, hitrosti in pospeškov, ki predstavljajo okvirne vrednosti oscilacij, ki jih je mogoče pričakovati v takšnem sistemu. Uporabljen je model z eno prostostno stopnjo, ki predstavlja gibanje vzmetenega in dušenega masnega elementa s konstantno hitrostjo po podlagi sinusne oblike. Rezultati so grafično prikazani v diagramih, na podlagi katerih je mogoče sklepati, na kakšen način na vrednosti oscilacij vplivajo različne oblike rebričenih tirnic, hitrosti vlaka ter masa vagona.
Abstract (ePrints, secondary language):	The thesis treats a problem of oscillations and vibrations which take rise in railway traffic. Incipient chapters cover the basis of theory of vibration as well as describe elements presented in railway superstructure, that have a significant influence on the occurence and propagation of vibration. Thereafter the wheel-rail contact and different types of vibrational sources, due to rail and wheel irregularities, are described in greater detail. Procedure implementation of vibration measurement as well as effects of train-induced vibration are also briefly discussed. Major portion of contents is focused on mitigating measures, with a great emphasis on under-sleeper pads. Based on the simple dynamic model of a train-track system, displacements, velocities and accelerations, which represent approximate values of oscillations, that can be anticipated in such system, are calculated in the end. Model is designed as a single degree-of-freedom system and represents movement of a damped mass element with constant speed on a sine curved grounding. Based on the results, that are graphically represented in diagrams, one can conclude, how the values of oscillations are dependant on geometrical parameters of rail corrugations, speed of train and mass of a carriage.
Keywords (ePrints, secondary language):	railway traffic;oscillations;vibrations;rail corrugation;vibration mitigation;under sleeper pads
ID:	8313095