Metodološki pristup razvoju gumeno metalnih opruga
Факултет:University of Niš, Faculty of Mechanical EngineeringДатум одбране дисертације:21-07-2015Ментор:Stamenković, Dušan Чланови комисије:Milčić, Dragan Mitrović, Radivoje Kuzmanović, Siniša Milošević, Miloš МетаподациПриказ свих података о дисертацији |
Пројекти:
Остали линкови:
http://eteze.ni.ac.rs/application/showtheses?thesesId=2755
https://fedorani.ni.ac.rs/fedora/get/o:1047/bdef:Content/download
http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=533728662
Сажетак:
The doctoral dissertation defines a new integrated methodology for the development
of rubber-metal springs based on the application of modern virtual product development
tools. The defined methodology encompasses all analytical, numerical, experimental and
optimisation procedures necessary for the virtual rubber-metal springs development process.
The main advantages of the new methodology reflect in the decrease in necessary
experimental investigations, usage of realistic service loads instead of assumed loads and
introduction of design of spring based on transmissibility and damping as the main
parameters of the vibration control process. In contrast to the classical approach to rubber
metal springs development, where the selection of rubber compound was done solely on
previous experience of the designer, the thesis defines the systematic procedure for the
selection of rubber compound based on the required spring natural frequency. Furthermore,
the dissertation introduces a new procedure
for approximate determination of the hysteresis
damping value based on the experimental testing by uniaxial compression. The methodology
also introduces a new procedure for the determination of heat generation during dynamic
loading, as the main factor influencing rubber aging, which completely relies on virtual
product development tools. The research into the prediction accuracy of several constitutive
models of multiple rubber compounds commonly used in rubber metal springs was also
conducted. In order to apply the finite element method in the rubber-metal springs
development process, the new procedure for approximate determination of the rubber-metal
contact friction coefficient value was developed and the research was conducted on the
influence of finite element shape and order selection on the accuracy of rubber-metal springs
numerical simulations using the finite element method.
By applying the new methodology for the development of rubber-metal springs, the
primary suspension spring of the locomotive 441 (444) of the JSC Serbian Railways was
developed. The developed spring was manufactured, and laboratory and exploitation
investigations were conducted, which led to obtaining the service permit for the railways
operated by the JSC Serbian Railways. During the laboratory and exploitation testing the
rubber-metal spring performed in accordance with the results obtained by the application of
the new development methodology, which verified the new integrated development
methodology and proved its practical applicability.
Више
Кључне речи:
virtuelni razvoja proizvoda, gumeno-metalne opruge, pasivna kontrola vibracija, metoda konačnih elemenata, primarno ogibljenje lokomotiva; virtual product development, rubber-metal spring, passive vibration control, finite element method, primary suspension of locomotives