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Recovery vehicles

Dumitrache A.

Zeszyty Naukowe Ruchu Studenckiego

2012

Nr 2

133--138

Armored Recovery Vehicles (ARV’s) are very important in nowadays military organizations because of the need to maintain its vehicles operable and ready to fulfill its tasks. Because of the evolution of military vehicles, ARV’s evolved and diversified also leading to different approaches, which are treated in this article. In order to make you understand these approaches, some information were put together in order to make a comparison between this different kinds of ARV’s. The article shows, that it is hard to say which is better, but makes the reader understand the pros and cons of every approach. In the end, a possible solution is presented leaving to decision into the reader’s will.

An advanced aeroelastic model for horizontal axis wind turbines

Dumitrescu H., Dumitrache A., Cardos V., Frunzulica A.

International Journal of Applied Mechanics and Engineering

2009

Vol. 14, no 3

683-702

In this paper, an advanced aeroelastic numerical tool for horizontal axis wind turbines (HAWT) is presented. The tool is created by coupling an unsteady aerodynamic model based on the lifting-line approximation with an elastodynamic model based on the beam approximation. The coupling is non-linear in the sense that at every time step the two models interact through data transfer from the one to the other. Two interfaces assure a constant communication between the two parts of the complete model. The aero-to-elastic interface defines the loads exercised on the structure, whereas the elastic-to-aero interface transmits the rates of deformations. The aeroelastic model is evaluated through comparisons of its predictions with experimental data as well as with predictions obtained by simpler models.