Raluca Dora IONESCU

28-3 CONSIDERAŢII PRIVIND ANALIZA STRUCTURAL-DINAMICĂ PENTRU O TURBINĂ EOLIANĂ DE MICĂ PUTERE CU AX VERTICAL

Această intrare a fost publicată în 2015 Volumul 28 și etichetată Ioan SZÁVA Luca ZANNE Raluca Dora IONESCU Sorin VLASE la de

CONSIDERATIONS ON THE DYNAMIC STRUCTURAL DESIGN FOR A SMALL POWER VERTICAL AXIS WIND TURBINE
The paper presents the main aspects regarding the dynamic structural design for a small power vertical axis wind turbine. The research is applied to a 3-bladed, Darrieus type, small power, vertical axis wind turbine installed on a self-standing pole. First the main sources for the dynamic forces acting on the structure are described. Then a complete investigation on the turbine structural response is done, performing a modal analysis applied to the single rotor, considering several rotational speeds. Next, taking into consideration a building integrated wind turbine, the system composed by the turbine rotor and the mast is investigated. Finally, a thorough discussion of the main implementation problems and design alternatives is presented for a building integrated wind turbine.
Keyword: small power vertical axis wind turbines, modal analysis, Campbell diagram, urban implementation
Cuvinte cheie: analiză modală, turbine eoliene de mică putere cu ax vertical, implementare urbană, diagrama Campbell

Descarcare text

27-79 CONSIDERAŢII PRIVIND ÎMBUNĂTĂŢIREA TIPULUI DE ÎNCERCARE AL ADEZIVILOR

Această intrare a fost publicată în 2015 Volumul 27 și etichetată Carol AMBRUS Ildikó-Renata MUNTEANU Ioan SZÁVA Pál Botond GÁLFI Piroska ORBÁN Raluca Dora IONESCU Sorin VLASE la de

CONSIDERATIONS ON THE ADHESIVE TESTING
TYPE’S IMPROVEMENT
The authors of the contribution analyse several types of the specimens, involved in the adhesives’ testing protocol. Based on the results of the Finite Element analysis, respectively of the experimental investigations ones, by means of Holographic Interferometry, they suggest a new type of specimen, which assures a more accurate evaluation of the pure shear effect in the adhesive layer. Also, their original testing stand destined to Holographic Interferometry investigations, described in an earlier contribution, can be efficiently involved in this new type of investigation of the adhesives.
The most critical issue consists of the high-accuracy determining of the shear strength of the adhesive layer, without the bending’s additional effect.
The proposed methodology and type of the specimen offer the adequate answer. The author’s further goal consists in involving this new approach in different kind of adhesives’ examination.
Keywords: Adhesive, shear resistance, Holographic Interferometry, specimen, testing stand
Cuvinte cheie: adeziv, rezistenţa la forfecare, Interferometria Holografică, epruvetă, stand pentru teste

Descarcare text