Developing test procedure and design of fixture for dynamic test of road ambulances

Download

index.pdf

Date

2019

Author

Kaya, Sinan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

166
views

132
downloads

The number of traffic accidents involving road ambulances is increasing. This situation increases the risk of death and injury of the patients and healthcare workers transported in the patient transport cabin of the road ambulances. Therefore, providing a safer environment for these occupants has become important. Medical devices, drawers, stretcher systems used in the road ambulances should be secured to avoid endangering safety of the occupants. The conformity of the fixing systems designed for this purpose must be verified by performing the 10 g tests of ambulance patient transport cabin in a sled test facility as required by EN 1789+A2 standard. The rules described in the standard cause some ambiguities during the evaluation of the test results. In this study, a new test procedure has been proposed in order to prepare the test sample properly, conduct tests and evaluate test results for the road ambulance tests. According to EN 1789+A2 standard, the 10 g tests are performed for five different directions (front, back, left, right, vertical). In METU-BILTIR Center Vehicle Safety Unit, the fixtures are used to fasten the test sample (i.e. ambulance cabin) to the sled during the tests. Dynamic analysis of the test fixture used for vertical direction has been performed by using Finite Element Analysis (FEA) Software Ls-DYNA. The results of FEA and deformations of the currently used test fixture during the tests have been observed and compared. It has been evaluated that the design of the fixture for the vertical direction test should be improved. Two completely new test fixtures and one with modifications on the currently used fixture are designed and FEA for these have been realized. It has been seen that these three alternative test fixtures provide advantages over the currently used fixture by decreasing plastic deformation.

Subject Keywords

Ambulances., Road Ambulance Safety, Dynamic Test, EN 1789, Conformity Assessment, Sled Test Fixture.

URI

http://etd.lib.metu.edu.tr/upload/12624469/index.pdf
https://hdl.handle.net/11511/44228

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

An approach to investigate relationship between speed and safety on urban arterials Ardiç Eminağa, Zerrin; Akyılmaz, M. Özdemir; Department of Civil Engineering (2008) Traffic safety is an important problem in today’s world with increasing number of fatalities and injuries in traffic accidents. For the solution of this problem, determination of accident prone locations on a network and reasons behind is an essential step, which is studied to some extend via different traffic accident analyses in the literature. While major factors affecting accident risk, such as speed, congestion, infrastructural aspects are known, it is still very difficult to figure out the interaction...
Design, analysis and experimental study of a novel side thorax impactor to be used in pedestrian protection tests for flat front vehicles Saraç Karadeniz, Sevgi; Gökler, Mustafa İlhan; Department of Mechanical Engineering (2021-10) Pedestrian protection is crucial and the vehicle manufacturers put more and more effort to make vehicles safer for pedestrians in case of pedestrian involved accidents. Injuries and fatalities are very frequent and severe in pedestrian involved accidents because the pedestrians are much more vulnerable when compared to the vehicle occupants as they do not have any protection like airbags or seatbelts. The current pedestrian protection regulations focus on the tests of bonnet type passenger cars for the head...
Synthesis of formal control strategies for traffic systems Bardakçı, Kemal Çağrı; Aydın Göl, Ebru; Department of Computer Engineering (2018) The problems caused by traffic congestion affect human life adversely. Wasted amount of time, fuel and money as well as adverse effects to environment are examples of these problems which reduce life quality. Studies on traffic management underline importance of traffic network control mechanisms. Different configurations of roads and signalized intersections complicate interactions among vehicles and pedestrians. Hence, traffic control systems, which need to satisfy complex specifications, should be constr...
Road safety evaluation of urban major arterials case study of 1071 Malazgirt Noulevard in Ankara Demirel, Mehmet; Tüydeş Yaman, Hediye; Department of Civil Engineering (2019) Traffic accidents cause damages in social, economic and health of communities, which have severe and serious costs in the long run. Infrastructural elements are also crucial, which can be avoided beginning from planning stages. Road Safety Audit (RSA) is a concept that lists and checks various design and operational characteristics of road projects and segments, to either prevent accidents and/or reduce their severity, implemented in many countries. However, lack of RSA legislation in Turkey is a major prob...
An optimizing approach for highway safety improvement programs Ünal, Serter Ziya; Acar, Soner Osman; Department of Civil Engineering (2004) Improvements to highway safety have become a high priority for highway authorities due to increasing public awareness and concern of the high social and economic costs of accidents. However, satisfying this priority in an environment of limited budgets is difficult. It is therefore important to ensure that the funding available for highway safety improvements is efficiently utilized. In attempt to maximize the overall highway safety benefits, highway professionals usually invoke an optimization process. The...

Citation Formats

S. Kaya, “Developing test procedure and design of fixture for dynamic test of road ambulances,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Mechanical Engineering., Middle East Technical University, 2019.