Author: administrateur

21 Oct Modern approaches in numerical calculus of the effects of explosions on structures

Romanian Academy of Technical Sciences (ASTR)
2013

This paper presents in a synthetic way the most important characteristics of an explosion and the most used empirical formulas for calculus of the blast wave parameters, in the general case of an air explosion. The paper also presents some numerical models and the newest procedures used for blast wave parameter and effect calculus upon structures.

21 Oct Sustainability in chemical engineering

Romanian Academy of Technical Sciences (ASTR)
2013

The specific directions of chemical engineering research evolution, derived from the new paradigms will be presented. For the new sustainable technologies the most adequate solutions, obtained with multiobjective optimization techniques, will be implemented. Finally, the exposed ideas will be materialized through a case study.

21 Oct Technological and Cross-Border Mixture Value Chain of Science and Engineering of Multi-Integrative Mechatronics-Integronics-Adaptronics with Use in the Construction of Intelligent Systems / Micro-Nano-Systems and Intelligent Adaptronic Equipements /

Romanian Academy of Technical Sciences (ASTR)
2013

This scientific paper presents in national premiere and in original multi-integrative and multi-potential concept of creation, experimentation, realization and integration on the route of the technological cross-border mixture value chain of intelligent mix-mechatronic-integronic-adaptronic products and systems / micro-nano-systems for the industry, economy and society, corresponding to the new intelligent labour jobs.

21 Oct Structural damping optimization by discrete parametric changes of isolation systems of base at seismic movements / Optimizarea amortizării structurale prin variaţii discrete parametrice a sistemelor de izolare a bazei la mişcări seismice

Romanian Academy of Technical Sciences (ASTR)
2013

This paper presents the methods of structural analysis of the level of damping elastomeric bearing system of second order. Thus, the method of analysis and optimization is to change with discrete values the stiffness of the elastomeric system and mass of the construction gravitational positioned on the base of isolation system.

21 Oct Dynamic modal analysis of road viaducts lean on the elastomeric anti-seismic devices / Analiza modală a viaductelor rutiere rezemate pe dispozitive antiseismice elastomerice

Romanian Academy of Technical Sciences (ASTR)
2013

This paper presents synthesis results of applied researches on the behaviour of modal road viaducts which are elastic leaning and have only mostly only rigid motions with elastic. Eigen mode analysis was performed for a road viaduct performed by Bechtel in Gilau area on Transilvania Highway.

21 Oct Effects cumulation by fatigue loading with more blocks of stresses / Cumularea efectelor la solicitarea la oboseală cu mai multe blocuri de tensiuni

Romanian Academy of Technical Sciences (ASTR)
2013

The paper deals with effects cumulation in the case of a mechanical structure cyclic loaded with blocks of different stresses. The most known relationships proposed in literature for this loading case, are empirical, refers to linear-elastic behavior of the material; they do not take into account the influence of mean stress, of load rate and deteriorations. In this paper one proposes a general relationship for the effects accumulation, due to cyclic loading with several blocks of normal stresses, in the case of nonlinear behavior of the structure material.

21 Oct Combined experimental researches on the stress state in the bearing structure of a special wagon / Cercetări experimentale combinate privind starea de tensiune din structura de rezistenţă a unui vagon de construcţie specială

Romanian Academy of Technical Sciences (ASTR)
2013

The authors conducted experimental research on the buggy ladle and beams chesonate models manufactured at scale. The actual structure of the bogie was tested on a special stand set up in the laboratory of Strength of Materials Department of the "Politehnica" University of Bucharest.

21 Oct Defining the reliability level of the car braking system based on the measured diagnosis parameters

Romanian Academy of Technical Sciences (ASTR)
2013

The paper proposes to assess the level of reliability of the devices taking into account the evaluation coefficient 〖K_ij〗^β and the importance coefficient 〖K_j〗^α, related to the parameters measured by diagnosis.

21 Oct Considerations over ecodesigning and its relations with Innovative Engineering / Unele consideraţii privind ecoproiectarea şi relaţionarea ei cu Ingineria Inovativă

Romanian Academy of Technical Sciences (ASTR)
2013

There are underlined some forms of engineering design process in correlation with scientific research and technology. The main European directives and regulations in ecodesign are analyzed.