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Title:

APPROXIMATION OF DERIVATIVES IN SEMI-ANALYTICAL STRUCTURAL OPTIMIZATION

Document type:
Konferenzbeitrag
Contribution type:
Textbeitrag / Aufsatz
Author(s):
Bletzinger, K.-U.; Firl, M.; Daoud, F.
Abstract:
This paper presents a straightforward and generally applicablemethod fordetection and elimination of errors in semi-analytical design sensitivitiesfor any kind of F.E. formulation. The basic property of the semi-analyticalapproach is that derivatives of the stiffness matrix and the load vectorare approximated by finite differences. Obviously truncation errors occurby this method which depend on the chosen step size and the kinematic assumptionsof the mechanical model. The accuracy problems in th...     »
Keywords:
Structural Optimization, Exact Semi-Analytical Sensitivity Analysis, FiniteDifference Approximations, Correction Terms, Beams, Plates, Shells, Solids
Book / Congress title:
III European Conference on Computational Mechanics Solids, Structures andCoupled Problems in Engineering
Organization:
Lehrstuhl f¨ur Statik, TU München
Year:
2006
Reviewed:
ja
Language:
de
Publication format:
Print
Format:
Text
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