Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Dumitriu Mădălina"'
Autor:
Dumitriu Mădălina, Răcănel Ionuţ Radu
Publikováno v:
Romanian Journal of Transport Infrastructure, Vol 7, Iss 2, Pp 40-60 (2018)
The paper focuses on the experimental verification of the results derived from numerical simulations, based on a model of the bogie-track system, where the vertical track irregularities are introduced in the form of a pseudorandom function. This func
Externí odkaz:
https://doaj.org/article/041d1a5f295f44bc90ebf8c22d58cb86
Autor:
Dumitriu Mădălina, Cruceanu Cătălin
Publikováno v:
Archive of Mechanical Engineering, Vol 64, Iss 2, Pp 219-238 (2017)
The article investigates the influence of the carbody vertical flexibility on the ride comfort of the railway vehicles. The ride comfort is evaluated via the comfort index calculated in three reference points of the carbody. The results of the numeri
Externí odkaz:
https://doaj.org/article/4ada480491d0422eb14ccb968369d1a7
Autor:
Dumitriu Mădălina
Publikováno v:
Archive of Mechanical Engineering, Vol 63, Iss 1, Pp 145-162 (2016)
The equipment mounted on the carbody chassis of the railway vehicles is a critical component of the vehicle in terms of ride comfort. The reason for that is their large mass, able to visibly influence the vibrations mode of the carbody. The paper exa
Externí odkaz:
https://doaj.org/article/2fccd43dd4ff464e8f2ab4232bb68c03
Autor:
Dumitriu Mădălina
Publikováno v:
Archive of Mechanical Engineering, Vol 63, Iss 1, Pp 25-44 (2016)
The paper focuses on a nonlinear model to represent the mechanical behaviour of a mix coil spring - rubber used in the secondary suspension of passenger rail vehicles. The principle of the model relies on overlapping of the forces corresponding to th
Externí odkaz:
https://doaj.org/article/053100ef55fe412abeeb1fe49c872886
Autor:
Dumitriu Mădălina
Publikováno v:
Archive of Mechanical Engineering, Vol 62, Iss 1, Pp 115-140 (2015)
W artykule skoncentrowano się na wpływie, jaki tłumienie wzdłużne i poprzeczne w zawieszeniu, w połączeniu z prędkością, ma na właściwości drgań pojazdów szynowych poruszających się po torze prostym. W oparciu o model pojazdu o 17
Externí odkaz:
https://doaj.org/article/bae21b5dfad64615ace3ebe82fd3027b
Autor:
Dumitriu Mădălina
Publikováno v:
Scientific Bulletin of the ''Petru Maior" University of Tîrgu Mureș, Vol 11, Iss 2, Pp 17-24 (2014)
The paper focuses on a method to synthesize the track vertical irregularities, with the possibility of application in the simulation of the dynamics in the railway vehicles. The basic elements of the method are the power spectral density of the track
Externí odkaz:
https://doaj.org/article/a2c6a2fb2aaa451eb780a7ba28f328db
Autor:
Dumitriu Mădălina
Publikováno v:
Archive of Mechanical Engineering, Vol 61, Iss 4, Pp 609-625 (2014)
W artykule oceniono poziom drgan pionowych w nadwoziu pojazdu szynowego generowanych przez nierównosci toru i zbadano połozenie punktu krytycznego z punktu widzenia komfortu jazdy. Zagadnienie jest rozwazane na podstawie zarówno modelu ”nadwozia
Externí odkaz:
https://doaj.org/article/5c5fd6ad825f4bec873b8d74f4dc7faa
Autor:
Dumitriu Mădălina, Gheţi Marius Alin
Publikováno v:
MATEC Web of Conferences, Vol 290, p 08008 (2019)
This paper examines the influence of the rebound longitudinal motion of the bogie upon the vibration behaviour in the bogie. The analysis is based on the results of the numerical simulations developed on the basis of a general model with a nine-degre
Externí odkaz:
https://doaj.org/article/4499823c4c164c2682b5c9be33987289
Autor:
Dumitriu Mădălina, Gheţi Marius Alin
Publikováno v:
MATEC Web of Conferences, Vol 178, p 06001 (2018)
The paper aims to evaluate the behaviour of vertical vibrations of a two-axle bogie at failure of a damper in the primary suspension of the vehicle. The level of vibrations in the bogie is shown to rise as a consequence of the imbalance triggered in
Externí odkaz:
https://doaj.org/article/bf452c4c11274676a2f4b96e567d90af
Publikováno v:
MATEC Web of Conferences, Vol 112, p 07011 (2017)
During braking, due to the interaction between the vehicles, longitudinal dynamic forces, characterized by different values and an irregular distribution along the train, develop in the train body, affecting the passengers` comfort or even the traffi
Externí odkaz:
https://doaj.org/article/816e79eeaa04478e9aba293b14a71dd0