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FACULTY -- Dr. Ramin Sedaghati

Department of Mechanical Engineering
Concordia University
1455 de Maisonneuve Blvd. W., CR-215
Montreal, Quebec, Canada H3G 1M8
E-mail: sedagha@ME.Concordia.ca
Phone: (514) 848-7971
Fax: (514) 848-8635
Office: CR-215


BIOGRAPHY

Dr. Ramin Sedaghati is currently an Assistant Professor in the Department of Mechanical Engineering, at Concordia. He received the B.Sc and the M.Sc degrees in Mechanical Engineering from Amirkabir University of Technology, Tehran in 1988 and 1990 respectively and his Ph.D degree in Mechanical Engineering from the University of Victoria, British Columbia in 2000.

His doctoral research, which offers a faster computer-based method of structural design optimization, has been published in numerous international journals. Dr. Sedaghati was working as post-doctoral fellow in the Canadian Space Agency (CSA), Spacecraft Engineering Branch, Saint-Hubert, Quebec before joining Concordia University.

During his work in CSA he has conducted extensive computational and experimental work on novel Force Limited Vibration (FLV) technique to prevent overtesting in space structures. Dr. sedaghati is currently collaborating with CSA on projects involving force limited vibration testing and smart structures. Dr. Sedaghati’s current research areas include Solid Mechanics (Stress, modal and thermal analysis), Computational Mechanics (Finite Element Method), Structural Design Optimization, Smart Materials and Structures, Structural Dynamics and Vibration.

COURSE INFORMATION

MECH 441: MECHANICAL ENGINEERING DESIGN (3 credits)

Prerequisite:
ENGR 244; MECH 313, 343. Introduction to overall reliability estimates and influence of stress-strength in determining the actual configuration of mechanical elements. Probabilistic design theory. Concepts in design; probabilistic approach; fatigue and failure of mechanical elements under dynamic loading; shafting; bolted and welded joints; anti-friction and journal bearings; design of gears.

Lectures:
three hours per week.

Tutorial:
two hours per week.

 

MECH 343: THEORY OF MACHINES I (3.5 credits)

Prerequisite:
EMAT 232; ENGR 243. Introduction to mechanisms; position and displacement; velocity; acceleration; synthesis of linkage; robotics; static force analysis; dynamic force analysis; forward kinematics and inverse kinematics; introduction to gear analysis and gear box design; kinematic analysis of spatial mechanisms.

Lectures:
three hours per week. Tutorial: one hour per week. Laboratory: two hours per week, alternate weeks.
NOTE: Students who have received credit for MECH 341 may not take this course for credit.

 

ENGR 460: FINITE ELEMENT ANALYSIS (3.75 credits)

Prerequisite:
EMAT 391; ENGR 244 or ENCS 245. Formulation and application of the finite element method to modelling of engineering problems, including stress analysis, vibrations, and heat transfer. Examples illustrating the direct approach, as well as variational and weighted residual methods. Elements and interpolation functions. Meshing effect. Error analysis. One- and two-dimensional boundary value problems. Development of simple programs and direct experience with general purpose packages currently used in industry for design problems

Lectures:
three hours per week.

Laboratory:
three hours per week, alternate weeks.

 

ENGR 6311: VIBRATIONS IN MACHINES AND STRUCTURES (4 credits)

Prerequisite:
ENGR 6101 or equivalent. Vibrations of discrete systems: Single-Degree of Freedom (SDOF) and Multi-Degree of Freedom (SDOF) systems; continuous systems: bars, beams, membranes, ... with various boundary conditions; mode superposition; energy methods; Rayleigh-Ritz method; applications to machine components, vehicle and aerospace structures.

RESEARCH INTERESTS

  • Solid Mechanics (Stress, modal and thermal analysis)
  • Machine Design
  • Structural Design Optimization
  • Multidisciplinary Design Optimization
  • Structural Dynamics and Vibration
  • Computational Mechanics (Finite Element Method)
  • Smart Materials and Structures

PUBLICATIONS

Journal papers published in the refereed journals (Since 2000)

  1. Sedaghati, R., Tabarrok, B., and Suleman, A., “Structural Optimization and Design of Structures with Frequency Constraints Using the Finite Element Force Method,” AIAA Journal, Vol. 40, No. 2, pp: 382-388, 2002.
  2. Sedaghati, R., Suleman, A., and Tabarrok, B., “Optimum Design of Adaptive Truss Structures Using the Integrated Force Method,” Journal of Computer Modeling in Engineering and Sciences (CMES), Vol. 2, No. 2, pp. 259-271, 2001.
  3. Sedaghati, R., Tabarrok, B., and Suleman, A., “Structural Design Optimization of Nonlinear Symmetric Structures using the Group Theoretic Approach,” AIAA Journal, Vol. 39, No. 8, pp. 1593-1599, 2001.
  4. Sedaghati, R., Tabarrok, B., and Suleman, A., and Dost, S., “Optimization of Adaptive Truss Structures using the Finite Element Force Method based on Complementary Energy,” Transaction of Canadian Society for Mechanical Engineering (CSME), Vol. 24, No.1B, pp. 263-271, 2000.
  5. Sedaghati, R., and Tabarrok, B., “Optimum Design of Truss Structures Undergoing Large Deflections Subject to a System Stability Constraint,” International Journal for Numerical Methods in Engineering, Vol. 48, No. 3, pp. 421-434, 2000.
  6. Sedaghati, R. and Suleman, A., “Computational Mechanics and Optimization- The Force Method Revisited,” submitted to the AIAA journal, March 2002.
  7. Sedaghati, R., Suleman, A., and Tabarrok, B., “Design Optimization Against Instability of Frame Structures Undergoing Large Deflections,” submitted to the International Journal for Numerical Methods in Engineering, May 2001.

Refereed conference papers (since 2000)

  1. Soucy, Y., Rao, V. and Sedaghati, R., “Investigation of the Semi- Empirical Method For Force Limited Vibration Testing,” ASTRO 2002- Proceedings of the 12th CASI Conference on Astronautics, Ottawa, Ontario, Canada, November 12-14,2002.
  2. Sedaghati, R. and Suleman, A., “Design Optimization Against Instability of Frame Structures Undergoing Large Deflections,” Proceedings of the 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, AIAA-2002-5527, Atlanta, Georgia, September 4-6, 2002.
  3. Sedaghati, R., “Design optimization of Shallow Frame Structures under System Stability Constraints,” Canadian Society for Mechanical Engineering (CSME),International Conference on Multidisciplinary Design in Engineering, CSME-MDE 2001, Montreal, QC, Nov. 21-22, 2001.
  4. Sedaghati, R. and Soucy, Yvan, “Base Excitation Dynamics-The Effective Mass Concept,” Internal Report, Canadian Space Agency/ Spacecraft Engineering, July 30, 2001.
  5. Sedaghati, R., Suleman, A. and Tabarrok, B., “Optimum Design of Frame Structures Undergoing Large Deflections Against System Instability,” Proceedings of the First MIT Conference on Computational Fluid and Solid Mechanics, Vol.1, pp. 725-728, MIT, Cambridge, MA, June 12-15, 2001.
  6. Sedaghati, R., Suleman, A. and Tabarrok, B., “Optimum Design of Structures with Multiple Frequency Constraints Using the Finite Element Force Method,” Proceedings of the 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Seattle, WA, April 16-19, 2001.
  7. Sedaghati, R., Suleman, A., and Tabarrok, B., “Topology Optimization of Adaptive Space Truss Structures,” Proceedings of the 51st International Astronautical Congress, IAF-00-A.3.10, Rio de Janeiro, Brazil, October 2-6, 2000.
  8. Sedaghati, R., Tabarrok, B., and Suleman, A., “Optimum Design of Nonlinear Symmetric Truss Structures Under System Stability Constraint,” AIAA/NASA/USAF/ISSMO Symposium on Multidisciplinary Analysis and Optimization, AIAA 2000-4835, Long Beach, CA, Sep. 6-8, 2000.
  9. Sedaghati, R., Tabarrok, B., and Suleman, A., “Integrated Force Method and Optimization of Adaptive Truss Structures,” Proceedings of the International Conference on Computational Engineering & Sciences ICES’2K, Vol. 2, pp. 1598-1603, Los Angeles, CA ,Aug. 21-25, 2000.

MISCELLANEOUS INFORMATION

Professional society memberships

  • Member, Canadian Society for Mechanical Engineering (CSME)
  • Member, American Society of Mechanical Engineers (ASME)
  • Member, American Institute of Aeronautics and Astronautics (AIAA)
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