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Studiul comparativ al diferitelor soluţii constructive deautospeciale destinat operaţiunilor de deszăpezire acăilor de rulare de pe aeroporturile din RomâniaSMAT2008V55Dragomir Costin; Hasnaş Şerban; Athanasiu DanStudiul reprezintă o comparaţie între diferitele soluţii constructive de autospeciale destinateoperaţiilor de deszăpezire pe aeroporturile internaţionale din România.În exploatarea curentăexistă mai multe combinaţii de autovehicule destinate acestor operaţii.Autovehiculele sunt echipate cu diverse dispozitive de îndepărtare a zăpezii. În mod frecventaproape toate autospeciale sunt construite în varianta cu tracţiune integrală. În lucrare seprezintă relaţiile matematice privitoare la dinamica acestora.The special hig-performance machines types use for snow clearance operating of Romain Airport areas. On thispaper is related the mathematical relations concerning with special machines four snow ploughs, towable jet sweepers,compact jet sweepers and integral wheel drive.Cuvinte cheie: rezistenţa la deplasare, coeficient de rezistenţă, tracţiune integrală, stabilitate longitudinală, compactjet sweeper, stabilitate transversală.SMAT2008V56QUALITY’S ASSURANCE, COMPULSORY CONDITION FOR MOTORVEHICLES MAINTENANCE PROCESSES OPTIMIZATIONPhD. Student Dan CIUBANCANProfessor Eugen NEGRUŞAbstract:In order to realize the maintenance processes optimization, one of the principal conditions is to assure anadequate quality.The paper proposes the following objectives: the identification of defects’ classification system, the determinationof the types of inspections of quality , conception of some flow diagrams on quality’s control, the establishment of somecategories of quality’s costs and its improvement possibilities, with the purpose of maintenance processes optimization,costs’ of exploitation reduction and, implicit, motor vehicles utilization’ s growing.The maintenance processes’ quality assurance is realized through control exercise by the line inspectors and/orthefinal control inspectors. It’s recommended that they are attested inspectors for Periodical Technical InspectioneffectuationThe data delivered by inspectors can facilitate the improvement of the technological process and realize aselection of purveyors in accordance with exchange pieces quality and delivered materials .Relying on inspection’s feedback a diagnoses analysis of the maintenance system can be realized and one isable to intervene in its conception, but also in its execution mode.32
SMAT2008V57COMPARATIVE PRACTICAL STUDY BETWEEN STATISTICALMETHOD AND WEIBUL MATHEMATICAL MODELDrd. ing. Dan Ciupancan Prof. univ. dr. ing. Eugen NegruşAbstract: This paper aims the comparative studying of the results obtained using statistical method with thoseobtained using Weibul mathematical model, while in case the level of confidence acquired through the two models’comparing is between the admitted limits, the proposed mathematical model is validated.SMAT2008V58EXPERIMENTAL STAND FOR TRYING AND TESTINGTHE COMPONENTS OF MOTOR-VEHICLES BRAKE SYSTEMConstantin DUMITRU, Violeta Cristina DUMITRUAbstract: In oder to achieve a safe controle for motor-cars speed in all the possible situations, thereare foresun two or mare braking systems for it. Braching assembly composed by a braking pedal acting uponthe central braking pump built by main cylinder with pistons and compensation reservoir for liquid, isdestined for creating the necessary pressure in the receiver cylindres that drive upon the proper brakes onall the motor- cars wheels. The paper presents the construction, working way and performances of anexperimental stand used for trying and testing the central brake pumps, receiving hydraulic cylinders - newand standard variants. The stand was conceived and completed in a connection, which can be modulatedaccording to the specific necessities of a certain brake component, studied at a certain moment. Both thespecific designing and executing matters, and the specific testing phrases are solved, representing thus anindispensable instrument in reducing the assimilation cycle of some brake components of a real quality onwhich the motor-vehicles fiability depends. That is wthy all the components of the braking system must beverified and controled so that these conditions must be according to international normes and standards(ISO 9000).KEY WORDS: Breke system, Testing, StandConstantin DUMITRU, Prof. univ. Ph.D. Eng., University of Craiova, Dept. of Mechanical,dumitrudc10@yahoo.com, + 40 723 163396, Craiova, Dolj, RomaniaVioleta Cristina DUMITRU, Assist. Drd. Eng., University of Craiova, Dept. of Mechanical,dumitru.violeta10@yahoo.com, + 40 765 490314, Craiova, Dolj, Romania33
Page 7 and 8: SMAT2008V14AUTOMOTIVE DEPORTANTE WI
Page 9 and 10: SMAT2008V18ROAD DYNAMIC EXPERIMENTA
Page 11 and 12: SMAT2008V22STUDY CONCERNING FRACTIO
Page 13 and 14: Consideration on the distribution o
Page 15 and 16: SMAT2008V30THE MODAL POWER ASPECTS
Page 17 and 18: SMAT2008V33THE OPTIMIZATION OF THE
Page 19 and 20: SMAT2008V37COUPLED MULTIBODY - FINI
Page 21 and 22: SMAT2008V41THE VALIDATION BY EXPERI
Page 23 and 24: SMAT2008V45GENERAL ALGORITHM FOR DE
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Page 35 and 36: SMAT2008T10THE FINIT ELEMENT METHOD
Page 37 and 38: SMAT2008E03THE INFLUENCE OF BIODIES
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Page 41 and 42: SMAT2008E09EXPERIMENTAL RESULTS CON
Page 43 and 44: SMAT2008E11THE MATHEMATICAL SIMULAT
Page 45 and 46: SMAT2008E15THE LPG USE IN DIESEL EN
Page 47 and 48: SMAT2008E20EXAUST EMISSIONS OF DIFF
Page 49 and 50: SMAT2008E24VVA FOR A SPARK IGNITION
Page 51 and 52: SMAT2008E27ESTIMATION BY CALCULATIO
Page 53 and 54: SMAT2008M04INFLUENCE OF THE PARTICL
Page 55 and 56: STUDY ON VEGETAL OILS CHARACTERISTI
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Page 59 and 60: SMAT2008M17EFFECTS OF QUENCING AND
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Page 65 and 66: SMAT2008M29ERROR ON THE GEOMETRICAL
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Page 69 and 70: SMAT2008M37EFFECT OF STIFFNESS UNCE
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Page 75 and 76: SMAT2008R07RESEARCH REGARDING THE V
Page 77 and 78: SMAT2008R11ANALYSIS REGARDING THE P
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SMAT2008R15VEHICLE DYNAMIC BEHAVIOU
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SMAT2008R18STUDY REGARDING THE ROAD
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SMAT2008R20INFLUENCE OF THE HUMAN E
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SMAT2008R24RESEARCH CONCERNING DETE
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