Računalniško podprto konstruiranje cestne varnostne ograje

Matej Vesenjak (Author), Zoran Ren (Author)

Abstract

Cestne varnostne ograje na javnih cestah so namenjene za preprečitev zleta vozila s cestisča ali preboja na nasprotni vozni pas. Evropski standard SIST EN 1317 podaja merila, ki jih mora ograja izpolnjevati pod testno obremenitvijo Dosedanja praktična opažanja kažejo, da je sedanji distančnik cestne varnostne ograje, ki se uporablja v Republiki Sloveniji, pretog. To ima za posledico prevelike pojemke pri naletu osebnega vozila. Zato je določitev primerne oblike distančnika izrednega pomena za povečanje varnosti udeležencev v prometu. Namen raziskave je oblikovanje novega distančnika, ki se bo nadzorovano deformiral in bo zmozen povečati akumulacijo deformacijske energije pri naletu vozil. V ta namen so z uporabo metode končnih elementov analizirane različne oblike distančnikov. V začetni fazi razvoja je analizirana togost različnih oblik distančnikov z navidez statično elasto-plastično analizo trirazsežnega modela odseka varnostne ograje. Ugotovljeno je, da ima sedanji distančnik zelo veliko togost in da so distančniki novih oblik zmozni večje, nadzorovane elasto-plastične deformacije pri naletu vozil.

Keywords

konstruiranje;ograje varnostne;simuliranje nelinearno;simuliranje numerično;varnost na cestah;varnostne ograje

Data

Language:	Slovenian
Year of publishing:	2003
Typology:	1.04 - Professional Article
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	Association of Mechanical Engineers and Technicians of Slovenia et al.
UDC:	004.94:625.746
COBISS:	6945051
ISSN:	0039-2480
Parent publication:	Strojniški vestnik
Views:	203
Downloads:	46
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Computer-aided design of a road restraint barrier
Secondary abstract:	Road restraint barriers on public roads are used to prevent a vehicle from veering off the road or breaking through on to the opposite carriageway. The European standard SIST EN 1317 specifies the criteria that the road restraint barrier has to meet during testing. Practical observations have shown that thedistance spacer currently used in the road restraint barriers in Slovenia is too stiff. This results in too rapid decelerations during vehicle impact. Designing an improved distance spacer is therefore extremely important for increasing the safety of vehicle occupants. The purpose of this research was to design a new distance spacer that deforms in a controllable manner and has an increased capacity for strain-energy absorption during vehicle impact. The new designs were analyzed with the finite-element method. In the initial phaseof the research, the stiffness of various designs of distance spacer was analyzed using quasi-static elastic-plastic analyses of a three-dimensional road-restraint-barrier model. It was found that the currently used distance spacer is indeed much too stiff and that new distance-spacer designs are capable of larger, controllable elastic-plastic deformation during vehicle impact.
Secondary keywords:	roadside safety;road restraint barriers;computer aided design;numerical simulations;neolinear simulations;varnost na cestah;ograje varnostne;konstruiranje;simuliranje numerično;simuliranje nelinearno;
URN:	URN:NBN:SI
Type (COBISS):	Not categorized
Pages:	str. 509-519
Volume:	ǂLetn. ǂ49
Issue:	ǂšt. ǂ10
Chronology:	2003
ID:	1745887