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Reliability-based Multidisciplinary Design Optimization of an Aeroelastic Projectile

Khodabakhsh, Amir Hossein | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49816 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Pourtakdoust, Hossein
  7. Abstract:
  8. In this research, Reliability-Based Multidisciplinary Design Optimization has been addressed. For this purpose, the main concepts in reliability-based design are investigated and the design methods based on reliability are explained. Providing a unified formulation to implement the optimal design structure based on the reliability, is the second part of this research. It has been intended to present a suitable structure for the design process considering the existing formulas and considering the numerical solutions. An aeroelastic projectile has been chosen as the target system for implementing the proposed process in the present study. The third section of this document has been dedicated to the proposition of a unified design structure, for goal-oriented design space search. In this section, a multilevel multidisciplinary structure is proposed in which implements a structured and targeted reliability-based design. Aerodynamic modeling of the projectile has been carried out using both Digital DATCOM as a semi-experimental method and a VLM, a numerical method. This enables us to find the force distribution on the lifting surfaces. The static aeroelastic behavior of the projectile wing has been considered. The structural characteristics of the wing have been found using the beam model for both bending and torsional behavior.Thus the equivalent beam for the wing has been computed. Finally, using the developed MDA and the RBMDO structure is presented and studied in terms of feasibility
  9. Keywords:
  10. Multidisciplinary Optimization ; Uncertainty-Base Multidisciplinary Design Optimization ; Reliability ; Reliability Based Design ; Guided Projectile

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