Rafael Ruiz. Education. Experience

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1 Rafael Ruiz Mechanical Engineer with broad experience in vibration control and vibration measurements. Direct experience with rotordynamic analysis, journal bearings characterization, uncertainty quantification, stochastic simulation and conceptual design of seismic protection devices for buildings. Education 2015 Doctor of Philosophy in Structural Engineering, University of Notre Dame (ND) and Pontificia Universidad Católica de Chile (PUC), Double Degree Master of Science in Mechanical Engineering, Universidad Simón Bolívar (USB), Caracas, 2004 Mechanical Engineering, Universidad Simón Bolívar, Caracas, Experience PhD Student, Dept. of Civil Environmental Eng. and Earth Sciences, University of Notre Dame, USA and Dept. of Structural and Geotechnical Eng., Pontificia Universidad Catolica de Chile, Chile. Design of a new tuned liquid damper to control the seismic response in buildings, its experimental characterization, numerical modeling and the life-cycle cost analysis employing stochastic simulation techniques to study the effect of structural and excitation uncertainties Head of "Dynamic of Machines Laboratory", Unidad de Laboratorios, Universidad Simón Bolívar, Facilities management oriented to support and increase the number of laboratory experiences, research and consulting activities related to dynamical systems and mechanical vibrations Project Supervisor, Maintenance and Reliability Unit, FUNINDES USB and Empresas Alimentos Polar S.A., Optimization of the maintenance by the updating of new facilities, assets and materials in SAP PM, performing criticality analysis, evaluating repeat failures, developing FMEA and reviewing maintenance plans Full Time Professor, Department of Mechanical Engineering, Universidad Simón Bolívar, Teaching Mechanical Vibrations, Machine Dynamics, Rational Mechanics and Numerical Methods for undergrad and master students. Researching activities oriented to rotordynamic analysis and thin film lubrication Research Assistant, Department of Mechanical Engineering, Universidad Simón Bolívar, Numerical and experimental characterization of turbomachines bearings, in particular Air Bearings and Floating Ring Bearings Race Car Suspention Designer, Formula SAE USB, Universidad Simón Bolívar, Design and construction of the race car suspension system for the anual Formula SAE international competition roruiz@uc.cl 1/5

2 Thesis and Projects Doctoral Thesis 2015 A New Type of Tuned Liquid Damper and its Effectiveness in Enhancing Seismic Performance: Numerical Characterization, Experimental Validation, Parametric Analysis and Life-cycle Cost Based Design. Supervisor: Prof. Diego López-García (PUC) and Prof. Alexandros Taflanidis (ND) Master Thesis 2007 Methodology for the Experimental Characterization of the Rotordynamic Coefficients in Air Film Bearing. Supervisor: Prof. Sergio E. Diaz (USB) Bachelor Thesis 2004 Design and Construction of a Tune Liquid Column Damper Test Rig. Supervisor: Prof. Sergio E. Diaz (USB) Other Projects 2008 Santos, J., Ruiz, R., Diaz, S. Failure Analysis of the K-301T Tilting Pad Bearing, Report prepared for METANOL DE ORIENTE, May, Ruiz, R. O., Gomez, J. L. Vibration Measurements Analysis in Magnetic Resonance Equipment, Report prepared for GENERAL ELECTRIC VENEZUELA, July, Ruiz, R. O. Synchronous and Asynchronous Experimental Characterization of a Three Lobe Air Bearing, Report prepared for ASME Tribology Division, November, (English) 2005 Di Liscia, M., Ruiz, R., Medina, L., Diaz, S. Rotordynamic Analysis of the Turbo generators SG-951 y SG-952 of ECOPETROL S.A., Report prepared for SIEMENS, July Di Liscia, M., Ruiz, R., Medina, L., Diaz, S. Measurement of the Natural Frequency of the Matiyure Bridge, Report prepared for GEOVIAL INC., April, Di Liscia, M., Ruiz, R., Characterization of the Flexible Rotor by Lumped Mass Method, Report prepared for Dynamic of Machines Laboratory USB, November, Publications Journals 2015 Ruiz R. O., Taflanidis A. A., Lopez-Garcia D., Life-cycle Based Design of Mass Dampers for the Chilean Region and its Application for the Evaluation of the Effectiveness of a Novel Tuned Sloshing Damper, Bulletin of Earthquake Engineering, under review. (English) 2015 Ruiz R. O., Taflanidis A. A., Lopez-Garcia D., Characterization and Design Considerations of Tuned Liquid Dampers with Floating Roof Having Arbitrary Cross-Sections, Journal of Sound and Vibration, under review. (English) 2015 Ruiz R. O., Lopez-Garcia D., Taflanidis A. A. Modeling and Experimental Validation of a New Type of Tuned Liquid Damper, Acta Mechanica, under review. (English) roruiz@uc.cl 2/5

3 2015 Ruiz R. O., Lopez-Garcia D., Taflanidis A. A. An Efficient Computational Procedure for the Dynamic Analysis of Liquid Storage Tanks, Engineering Structures, vol. 85, (English) 2008 Ruiz R. O., Di Liscia M. H., Medina L., Diaz S. E. Asynchronous Dynamic Coefficients of a Three Lobe Air Bearing, Journal of Engineering for Gas Turbines and Power, vol. 130, issue 5, September (English) 2008 R. O. Ruiz, S. E. Diaz, M. Di Liscia, R. Castro, Analisis no Lineal de Cojinetes de Anillo Flotante, Revista Ciencia e Ingenieria, vol. 29, issue 2, April-July Congress Proceedings (English) 2015 R. O. Ruiz, D. Lopez-Garcia and A. A. Taflanidis, Seismic Optimization of a Novel Tuned Sloshing Damper for the Chilean Region based on Life-cycle Cost Criteria, Proceedings of the 12th International Conference on Applications of Statistics and Probability in Civil Engineering, Vancouver, Canada, July R. O. Ruiz, D. Lopez-Garcia and A. A. Taflanidis, Tuned Liquid Damper with Floating Roof: A New Device to Control Earthquake-Induced Vibrations in Structures, Proceedings of the XI Congress of Seismology and Seismic Engineering ACHISINA, Santiago, Chile, March R. O. Ruiz, D. Lopez-Garcia and A. A. Taflanidis, An Innovative Type of Tuned Liquid Damper, Proceedings of the Tenth U.S. National Conference on Earthquake Engineering, Anchorage, Alaska, July R. O. Ruiz, and D. Lopez-Garcia, Experimental Validation of a New Type of Tuned Liquid Damper, Proceedings of the 14th Pan-American Congress of Applied Mechanics, Santiago, Chile, March R. O. Ruiz, and D. Lopez-Garcia, A Computationally Efficient Numerical Model for the Seismic Analysis of Liquid Storage Tanks, Proceedings of the Vienna Congress on Recent Advances in Earthquake Engineering and Structural Dynamics, Vienna, Austria, August J. A. Matute, R. O. Ruiz, y S. E. Díaz, A View to the Energy Dissipation Mechanisn of a Gas Foil Bearing s Structure Due to Dry Friction, Proceedings of the ASME TurboExpo 2012, Copenhagen, Denmark, June Medina, L., Ruiz R. O., Diaz S. E. A Simple Approach to Determine Uncertainty Bounds on Bearing Rotordynamic Coefficients Identification, Proceedings of the ASME Turbo Expo 2008, Berlin, Germany, June, Ruiz R. O., Di Liscia M. H., Diaz S. E. Feeding Holes Air Flow Choke Effect on Dynamic Coefficient of an Air Bearing, Proceedings of the Twelfth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, USA, February Ruiz R. O., Di Liscia M. H., Medina, L., Diaz S. E. Asynchronous Dynamic Coefficients Of A Three Lobe Air Bearing, Proceedings of the ASME TurboExpo 2007, Montreal, Canada, May, Ruiz R. O., Di Liscia M. H., Diaz S. E. Effect of the Orbit Shape on the Experimental Measurement of a Three Lobe Air Bearing, Proceedings of the IFToMM 7th International Conference on Rotor Dynamics, Vienna, Austria, September, Ruiz R. O., Di Liscia M. H., Diaz S. E., Medina L. Experimental Measurement of a Three Lobe Air Bearing Rotordynamic Coefficients, Proceedings of the ASME TurboExpo 2006, Barcelona, Spain, May, roruiz@uc.cl 3/5

4 2005 Bellabarba, E., Ruiz, R., Diaz, S. E, Rastelli, V., A Test Rig for Air Bearings Dynamic Characterization, Proceedings of the World Tribology Congress III, Washington D.C., USA. September, Congress Proceedings 2014 R. O. Ruiz, D. López-García and A. Taflanidis, Optimizacion de un Nuevo Amortiguador Liquido Sintonizado Para el Control de la Respuesta Sismica en Estructuras, proceedings of the XIII Jornadas de Mecánica Computacional, Curico, Chile, Octubre R. O. Ruiz y Diego López-García, Modelo Para Estimar la Respuesta Sísmica de Estructuras de Almacenamiento de Líquidos, proceedings of the XI Jornadas de Mecánica Computacional, Valparaiso, Chile, Octubre J. A. Matute, R. O. Ruiz, y S. E. Díaz, Una Primera Aproximación al Mecanismo de Disipación de Energía en Cojinetes de Superficie Deformable, proceedings of the XII Congreso y Exposición Latinoamericana de Turbomaquinaria, Querétaro, México, Febrero Ruiz R. O., Di Liscia M. H., Diaz S. E. Identificacion de Coeficientes Dinamicos en Cojinetes de Pelicula de Aire, Proceedings of the ENIEF 2008, San Luís, Argentina, November, Ruiz R. O., Diaz S. E. Estudio de la Dinámica no Lineal de un Rotor Soportado por Cojinetes de Anillo Flotante," Proceedings of the ENIEF 2008, San Luís, Argentina, November, Gómez J. L., Torres J. E., Ruiz R. O., Diaz S. E. Estimación de Coeficientes Dinámicos en Cojinetes de Zapatas Pivotantes, Proceedings of the ENIEF 2008, San Luís, Argentina, November, Ruiz R. O., Di Liscia M. H., Diaz S. E. Evaluacion del Metodo de Minimos Cuadrados para la Prediccion de la Dinamica de un Cojinete de Aire Hidrostatico, Proceedings of the IX CIMENICS, Porlamar, Venezuela, April, Ruiz R. O., Di Liscia M. H., Medina, L., Diaz S. E. Medicion y Calculo de Coeficientes Dinamicos en Cojinetes de Pelicula de Gas, Proceedings of the XI Congreso Latinoamericano de Turbomaquinarias, Veracruz, México, November, M. Di Liscia, R. O. Ruiz, S. E. Díaz, Desarrollo de un Software para el Análisis Dinámico de Cojinetes, Proceedings of the VI Congreso Nacional de Ingenieria Mecanica, Mérida, Venezuela, October, R. O. Ruiz, S. E. Díaz, M. Di Liscia, Desarrollo de un Software para el Análisis Rotodinámico de Turbomáquinas, Proceedings of the VI Congreso Nacional de Ingenieria Mecanica, Merida, Venezuela, October, R. O. Ruiz, S. E. Diaz, M. Di Liscia, R. Castro, Analisis no Lineal de Cojinetes de Anillo Flotante, Proceedings of the VI Congreso Nacional de Ingenieria Mecanica, Merida, Venezuela, October, Ruiz R. O., Di Liscia M. H., Diaz S. E. Algoritmos Para la Medicion y Calculo de Coeficientes Dinamicos en Cojinetes de Pelicula de Gas, Proceedings of the VIII CIMENICS, Pampatar, Venezuela, March, Ruiz, R. O., Diaz, S. E., Diseño y Construccion de un Amortiguador Dinamico de Columnas de Agua Para Controlar Sismos en Edificios, Proceedings of V Congreso Nacional de Ingenieria Mecanica, Merida, Venezuela, October, roruiz@uc.cl 4/5

5 Aug-Sep 2009 Other Academic Activities Research Visitor at Aerospace Department, University of Michigan. Supervisor: Prof. Carlos Cesnik. Topic: Introduction to Aeroelasticity Reviewer of the VII Congreso Anual de Ingeniería ASME USB Reviewer of the ASME TurboExpo Gas Turbine Technical Congress and Exposition Technical Committee Member of the XI Congreso y Exposición Latinoamericana de Turbomaquinaria. Distintion and Awards Partial Grant to Support Dual PhD Students, Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame. US Scholarship Grant awarded by Vicerrectorado de Investigación de la Pontificia Universidad Católica de Chile through different programs like "Instructor Becario", "Ayudante Becario" and "Becas de Cotutela en el Extranjero". Chile Outstanding Teaching Award given by Vicerrectorado Académico Universidad Simón Bolívar Professor of the Year Award given by Federación de Estudiantes Universidad Simón Bolívar Young Researcher Title given by Observatorio Nacional de Ciencia, Tecnologia e Innovacion Honorific Mention for the Graduate Master Thesis, Universidad Simón Bolívar Finalist of the ASME Tribology Division Young Engineer Short Paper Contest. United States of America 2004 Honorific Mention for the Undergraduate Thesis, Universidad Simón Bolívar. Languages Spanish English Native Full Professional Proficiency Computer Skills Matlab, Mathcad, Labview ProEngineer, Autocad, Solid Works, Etaps, Ansys Windows, Ubuntu Microsoft Office, Latex, Open Office roruiz@uc.cl 5/5