an efficient dynamic re-analysis of aerospace structures using combined approximation techique...

24
 1 DRAFT 51 st  AIAA/ASM/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Confere nce Tracking Number: 210890 AN EFFICIENT DYNAMIC RE-ANALYSIS OF AEROSPACE STRUCTURES USING COMBINED APPROXIMATION TECHIQUE THROUGH MATLAB SIMULATION Hesham Afifi, Emily Afifi, Sathya N. Gangadharan Embry-Riddle Aeronautical University, Daytona Beach, FL 32114 Efstratios Nikolaidis The University of Toledo, Toledo, OH 43606 ABSTRACT Achieving a high strength-to-weight ratio is one of the most important goals in aerospace structures. During the design process, the structure experiences several changes to reach this goal. Any change to the geometry and/or material directly influences the global stiffness of the structure. Modification of the applied loading or stiffness impacts the solution of displacements. Each design change requires the implicit analysis equation to be resolved. In large scale models with thousands of degrees of freedom, the cost and time of repeated reanalysis, even for a small change, is significant. Kirsch developed the co mbined approximation approach (CA) to provide an efficient and accurate reanalysis of large structures, even with great changes in the design. In this study, the CA method has been extended to approximate the steady state response of structures and a MATLAB code has been developed to approximate the new response of a wing box model subjected to a harmonic wind gust load. The response of the modified design is approximated, as a 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<BR>18th 12 - 15 April 2010, Orlando, Florida AIAA 2010-264 0 Copyright © 2010 by Hesham Afifi. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.

Upload: straulle

Post on 03-Jun-2018

217 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 1/24

Page 2: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 2/24

Page 3: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 3/24

Page 4: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 4/24

Page 5: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 5/24

Page 6: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 6/24

Page 7: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 7/24

Page 8: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 8/24

Page 9: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 9/24

Page 10: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 10/24

Page 11: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 11/24

Page 12: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 12/24

Page 13: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 13/24

Page 14: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 14/24

Page 15: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 15/24

Page 16: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 16/24

Page 17: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 17/24

Page 18: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 18/24

Page 19: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 19/24

Page 20: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 20/24

Page 21: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 21/24

Page 22: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 22/24

Page 23: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 23/24

Page 24: An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

8/12/2019 An Efficient Dynamic Re-Analysis of Aerospace Structures Using Combined Approximation Techique Through Matlab Simulation

http://slidepdf.com/reader/full/an-efficient-dynamic-re-analysis-of-aerospace-structures-using-combined-approximation 24/24