TITLE:

INTEGRATED SIZING AND SHAPE OPTIMIZATION USING ISOGEOMETRIC ANALYSIS METHODS

DATE:

Friday, Sep 14th, 2012

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Attila Nagy.
Post-doctoral scholar, Jacobs School of Engineering.
University of California San Diego.

ABSTRACT:

The purpose of this talk is to demonstrate that computer-aided geometric de-
sign (CAGD), physical analysis, and design optimisation are inherently joint engineering
endeavours and maybe seamlessly integrated in a common framework. The inspiration of
the work emanates from the recently introduced isogeometric analysis. The isogeomet-
ric paradigm is aimed at unifying the geometric and analysis descriptions of engineering
problems. This unification is brought about by integrating the geometric description of
a design and its analysis. Consequently, the isogeometric approach provides a natural
environment to develop design optimisation tools.
As a summary of some recent efforts, a comprehensive non-uniform rational B-splines
(NURBS) based isogeometric structural design optimisation framework is introduced.
The proposed design framework is developed for sizing, form finding, and the coupled
optimisation of form and sizing of thin-walled anisotropic shells of the Kirchhoff-Love
class. It is however worth highlighting that the fundamental ideas are applicable to gen-
eral structural models. Salient elements of isogeometric design are outlined and harmony
between the different components is emphasized through consistent use of isogeometric
concepts and precepts. Sequential convex conservative approximations (CCA) techniques
specifically developed to solve the arising mathematical programming problems are dis-
cussed in brief. The applicability of the framework is verified using several example
problems involving frequently employed design objectives and constraints, e.g. structural
weight, stiffness or buckling load factor.

HOST:

Dr. Satchi Venkataraman.

DOWNLOAD:

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