FUNCTIONAL CORRELATIONS REGARDING PASSIVE ISOLATION OF SYMMETRICAL SYSTEMS

Aurora POTÎRNICHE, Silviu NĂSTAC

Abstract


The paper deals with the passive isolation for a rigid structure building insulated on anti-seismic elastic devices. The basic hypothesis is that according to the structure presents geometrical and insulation configurations symmetries. This allows the decoupling of the eigenmodes and thereby, is simpler to evaluate the impact of the dynamic forces transmitted through the terrain-structure path during the earthquake. The classical theory of the vibration isolation is the base for evaluate the isolation degree for the considered structure. As an excitation factor it was considered the complex signal of an earthquake defined through the ground motion acceleration. The analysis that was made in the paper reveals the need to identification and evaluation requirements for the functional correlations between the reference parameters of the considered structure and the characteristics of the isolating and insulating devices.

Key words: anti-seismic devices, vibration isolation, eigenmodes, isolation degree.


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References


Beltrán-Carbajal, F., Vibration analysis and control – new trends and developments, InTech, ISBN 978-953-307-433-7, Rijeka, Croatia, 2011

Bratu, P., Vibratiile sistemelor elastice, Ed. Tehnica, Bucuresti, 2000

Bratu, P., Sisteme elastice de rezemare pentru masini si utilaje, Ed. Tehnica, Bucuresti, 1990

Bratu, P., Analiza structurilor elastice. Comportarea la actiuni statice si dinamice, Ed. Impuls, Bucuresti, 2011

Bratu, P., Vasile, O., Modal analysis of the viaducts supported on the elastomeric insulators within the Bechtel constructive solution for the Transilvania Highway, J. Sound and Vibration, Volume IX, Issue 2, pp. 77-82, ISSN 1584-7284, 2012

Kelly, M.J., Konstantinidis, A.D., Mecha-nics of rubber bearings for seismic and vibration isolation, J. Wiley&Sons Ltd., 2011

Graham Kelly, S., Mechanical vibrations. Theory and applications, Cengage Learning, ISBN 978-1-4390-6214-2, Stamford, USA, 2012

Harris, C.M., Piersol, A.G, Harris’ Shock and vibration handbook (fifth edition), The McGraw-Hill Book Co, ISBN 0-07-137081-1, USA, 2002

Leopa, A., Analiza comportarii la solicitari dinamice provenite din seisme si trafic rutier a viaductelor cu legaturi mecanice selective cu disiparea energiei prin efecte vascoase si prin frecare uscata, Post-doctoral Research Project PD-597, 2012

Leopa, A., Nastac, S., Dynamical Res-ponse Analysis on a System with One Degree of Freedom Stresses by the Different Pulse Excitation Functions, The Annals of "Dunarea de Jos" University of Galati, Fascicle XIV Mechanichal Engineering, ISSN 1224-5615, vol.2, pp.71-74, 2010

Leopa, A., Nastac, S., Debeleac, C., Re-searches on damage identification in passive vibro-isolation devices, SHOCK AND VIBRATION, Volume 19, Issue 5, pp. 803-809, DOI: 10.3233/SAV-2012-0689, ISSN 1070-9622

Leopa, A., Nastac, S., Debeleac, C., Pro-tection Against Vibrations, a Desideratum of The Sustainable Development, The 12th In-ternational Multidisciplinary Scientific GeoConference SGEM2012 Conference Proceedings, Vol. 5, pp.641-648, ISSN 1314-2704, DOI: 10.5593/sgem2012

Nastac, S., Dynamic Analysis of Vibration Isolation Systems for Construction Embedded Equipments, A Dissertation submitted to the "Dunarea de Jos" Uni-versity of Galati, Romania, for the PhD Degree, 2006

Nastac, S., Advances in Computational Dynamics of Passive Vibration Isolation Devices, The CD-Proceedings of the 1st EAA-EuroRegio 2010 Congress on Sound and Vibration, ISBN 978-961-269-283-4, Ljubljana, Slovenia, 15-18 September 2010, paper 230, with abstract in Acta Acustica united with Acustica, vol.96, Supplement 1 - 2010, E21 466, ISSN 1610-1928, S5-14, pp.S48.

Nastac S., Leopa A., Comparative Ana-lysis of Visco-elastic Models with Variable Parameters, Analele Universitatii "Eftimie Murgu" Resita, Anul XVII, Nr. 1, ISSN 1453 - 7397, pp. 227-232, 2010

Nastac, S., Computational dynamics of vibroisolation devices for embedded systems, Chapter 11 in Research Trends in Mechanics, vol. IV, Eds.: Munteanu L., Chiroiu V., Sireteanu T., Ed. Academiei Romane, ISBN 978-973-27-1945-1, pp. 241-273, 2010

Yin Jun Jiang et al., Experimental Study on Seismic Isolation Bearing of Large Aqueduct, Applied Mechanics and Materials, Volumes 226-228, pp. 1693-1696, 2012

Ying Bo Pang, Seismic Response Analysis of Soil-Structure Interaction on Base Isolation Structure, Advanced Materials Research, Volume 663, pp. 87-91, 2013


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