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RICHARD C. EHRGOTT E-mail: [email protected] EDUCATION Ph.D. Degree Engineering, May 1992. University of Southern California Major: Civil Engineering/Applied Mechanics/Structural Dynamics Minor: Applied Mathematics/Numerical Analysis/Finite Element Analysis

RELEVANT EXPERIENCE 8/1996 to 12/2010 Structural Engineer Pratt & Whitney Rocketdyne, Canoga Park CA Performing dynamic and stress analysis using I-DEAS, ANSYS, NASTRAN, FEMAP on structural and electronic components of the International Space Station, Space Shuttle Main Engines and Advanced Programs. Publish analysis reports. Support hardware design, vibration testing and failure investigations. Present related materials at design reviews, engineering review boards and to NASA. 6/2008 to 10/2009 STRESS CONSULTANT Posey Company, Arcadia, California Performed finite element analysis to evaluate the stress, deflection and fatigue life of articulating hospital beds. 5/1996 to 6/1996 VIBRATION CONSULTANT John A. Martin and Associates, Los Angeles, California Performed experimental vibration survey of the San Diego Conference Center. 3/1996 to 5/1996 STRESS CONSULTANT Answer Product, Los Angeles Performed Finite Element analysis of bicycle components 4/1996 to 5/1996 VIBRATION CONSULTANT Instrumentation and Measurement Corporation, Westlake Village, California Performed an experimental evaluation of a prototype capacitance type micromachined accelerometer. 7/1995 to 10/1995 STRESS CONSULTANT Falconbridge, Ontario, Canada Thermal and stress Finite Element analysis (I-DEAS) of metal producing furnace components. 6/1995 to 8/1995 VIBRATION CONSULTANT John A. Martin and Associates, Los Angeles, California Performed seismic study of the Olive View Hospital using ETABS 6.0 Finite Element code.

4/1995 to 8/1995

VIBRATION CONSULTANT Harman/JBL Consumer Group, Northridge, California Developed experimental methodology for shock testing of speakers. Performed Finite Element analysis of critical speaker components.

4/1993 to 7/1994

STRESS CONSULTANT Nicholson Manufacturing Company, Seattle, Washington Performed stress and stability analysis using Finite Element (I-DEAS) and classical methods on the Docksider, a large articulated arm used for unloading ships.

8/1992 to 8/1993

CONTRACT ENGINEER for the Rho Company Inc. At the Boeing Company, Seattle, Washington Stress Analyst for the 777 aircraft tool design group. Performed Finite Element stress and stability analysis using I-DEAS and ANSYS programs. Supported design of handling equipment, scaffolding, overhead equipment, transportation fixtures and all the aircraft support structures used in the automated final body join. Wrote the Boeing stress manual "Stress Analysis in Tool Engineering." Taught Finite Element course using I-DEAS

6/1989 to 12/1989

FINANCE CONSULTANT Gregory Green Associates, London, England Developing and evaluating numerical optimization codes for application in solving the Maximum Entropy problem.

10/1988 to 1/1989

STRESS CONSULTANT Pearce Structures, Chatsworth, California Involved in the analysis and design of large space frame systems for the BIOSPHERE II project. Static, seismic, wind and thermal analysis was performed using Finite Elements methods.

6/1981 to 8/1987

MECHANICAL ENGINEER Rocketdyne Division, Rockwell International Corporation Performed structural dynamic analysis of the Space Shuttle Main Engine components using Finite Element methods involving random, shock, and frequency response. Correlated results with engine test data and laboratory vibration tests. Interfaced with design and development units evaluating design changes and making design revision recommendations.

11/85 to 3/86

VIBRATION STABILITY CONSULTANT Image Sciences Inc., Sepulveda, California Analyzed vibration problems on high speed motion picture cameras using nonlinear computer simulation to test corrective measures.

TEACHING EXPERIENCE

9/1996 to PRESENT

FULL PROFESSOR Civil, Industrial and Applied Mechanics Department California State University, Northridge Full-time faculty member. Taught the following graduate and undergraduate courses: AM 542 AM 410 CE 435 CE 439 AM 340 AM 510 Finite Elements Vibrations Structures Steel Design Adv. Strength of Materials Advanced Vibrations AM 521 CE 536 AM 316 AM 317 C100 CE 436 Aircraft Structures Structural Dynamics Dynamics Mechanics Laboratory Inrto. to Computers Advanced Structures

8/1987 to 9/1988

EDUCATIONAL SPECIALIST Modernization Program for the Egyptian Air Force Academy, Cairo, Egypt Duties involved teaching; writing of educational material; evaluation and implementation of Computer Aided Instructional software; organization of Materials, Strength of Materials and Aircraft Structures laboratories.

9/1988 to 8/1996

ASSOCIATE PROFESSOR Civil, Industrial and Applied Mechanics Department California State University, Northridge CONSULTANT Naval Weapons Center at China Lake Teaching Structural Dynamics and Aircraft Structures courses

6/1991 to 8/1991

RECENT PUBLICATIONS Ehrgott, R., Panossian, H., Davis, G., "Modeling Techniques For Evaluating The Effectiveness Of Particle Damping In Turbomachinery" Presented at the 50th American Institute of Aeronautics and Astronautics (AIAA) - Structures, Structural Dynamics, and Materials Conference, Palm Springs, California, May 4-7, 2009 Panossian, H., Ehrgott, R., "Non-Obstructive Particle Damping (NOPD) Treatment Optimization for Composite Honeycomb Panels." Presented at the 48th American Institute of Aeronautics and Astronautics (AIAA) - Structures, Structural Dynamics, and Materials Conference, Waikiki, Hawaii, April 23-26, 2007. Ehrgott, R., Panossian, H., Davis, G., "Particle Damping in Turbomachinery," Presented at the PWR Technical Excellence Conference Canoga Park, California September 14th, 2006 Bavarian, B., et al., "External Support of Concrete Structures Using Composite Materials." Presented at the First International Conference on Composites in Infrastructure, Tucson, Arizona, January 15-17, 1996 Masri, S.F., Ehrgott, R.C., Kumar, R. 1995 "Modeling and Control of an Electrorheological Device for Structural Control Applications." Journal of Smart Materials and Structures, Institute of Physics UK, vol.4, suppl., no.1A Ehrgott, R.C., Masri, S.F., "Structural Control Applications of an Electrorheological Device." Proceedings of the First World Conference on Structural Control. Los Angeles, California, August 3-5, 1994. Member of the organizing committee. Ehrgott, R.C., Masri, S.F., 1994. "Experimental Characterization of an Electrorheological Material Subjected to Oscillatory Shear Strains." Trans. ASME, Journal of Vibration and Acoustics. Ehrgott, R.C., Masri, S.F., "Applications of ER Materials in Smart Structures." Presented at the First International Conference on Smart Structures, San Diego Calif., March, 1993. Ehrgott, R.C., Masri, S.F., 1992. "Modeling the Oscillatory Dynamic Behavior of Electrorheological Materials." Journal of Smart Materials and Structures, Institute of Physics UK,1 275-285. Ehrgott, R.C., Masri, S.F., "Studies of a Controllable Electrorheological Vibration Damper." Presented at the First International Conference on Motion and Vibration Control. Yokohama, Japan, 1, 356-361, Sept. 7-11, 1992. Chaired working group. Ehrgott, R.C., Masri, S.F., "Use of ER Materials in Intelligent Systems." Presented at the U.S.-ItalyJapan Workshop on Structural Control and Intelligent Systems. Sorrento, Italy, July 12-15, 1992.

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