A Gradient-Based Flutter Constraint Including Geometrically Nonlinear Deformations

2019 ◽  
Author(s):  
Christopher A. Lupp ◽  
Carlos E. Cesnik
Keyword(s):  
Geometrically Nonlinear ◽  
Gradient Based ◽  
Nonlinear Deformations

Analysis and Optimization-Based Synthesis of Compliant Mechanisms

2008 ◽  
Vol 58 ◽  
pp. 47-53 ◽  
Author(s):  
Alexander Hasse ◽  
Lucio Flavio Campanile
Keyword(s):  
Mechanical Model ◽  
Compliant Mechanisms ◽  
Geometrically Nonlinear ◽  
Nonlinear Beam ◽  
Beam Elements ◽  
Activation Force ◽  
Nonlinear Deformations

Compliant mechanisms fulfil a desired force and displacement characteristic. The development of such structures having a defined kinematical motion and subjected to several constraints, like deformability, stiffness and activation force is highly challenging. The present work deals with a methodology for analysing compliant mechanisms considering geometrically nonlinear deformations. By assembling pre-calculated nonlinear beam elements a new beam truss approach is introduced. The accuracy and quality of the mechanical model are verified by selected examples and compared to existing methods.

Design of Lightweight Composite Structures: A Parameter Free Structural Optimization Approach

2012 ◽  
Vol 504-506 ◽  
pp. 1391-1396
Author(s):  
Michael Fischer ◽  
Helmut Masching ◽  
Matthias Firl ◽  
Kai Uwe Bletzinger
Keyword(s):  
Finite Element ◽  
Structural Optimization ◽  
Industrial Application ◽  
Composite Structures ◽  
Large Scale ◽  
Finite Element Models ◽  
Optimization Approach ◽  
Geometrically Nonlinear ◽  
Gradient Based ◽  
Algorithmic Techniques

This contribution presents computational concepts and algorithmic techniques for simulation and gradient-based optimization of geometrically nonlinear and large-scale finite element models of composite structures. Several industrial application examples illustrate the methods, show the applicability to large problems, and prove the high parallel efficiency.

Fluid-Structure Interactions with Geometrically Nonlinear Deformations

2019 ◽  
Author(s):  
Jonathan Boustani ◽  
Oliver M. Browne ◽  
Jonathan Wenk ◽  
Michael F. Barad ◽  
Cetin C. Kiris ◽  
...  
Keyword(s):  
Geometrically Nonlinear ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Nonlinear Deformations

High-Fidelity Gradient-Based Wing Structural Optimization Including a Geometrically Nonlinear Flutter Constraint

2022 ◽  
Author(s):  
Eirikur Jonsson ◽  
Cristina Riso ◽  
Bernardo Bahia Monteiro ◽  
Alasdair C. Gray ◽  
Joaquim R. Martins ◽  
...  
Keyword(s):  
Structural Optimization ◽  
High Fidelity ◽  
Geometrically Nonlinear ◽  
Nonlinear Flutter ◽  
Gradient Based

Gradient based system-level diagnosis

2007 ◽  
Vol 51 (1-2) ◽  
pp. 43
Author(s):  
Balázs Polgár ◽  
Endre Selényi
Keyword(s):  
System Level ◽  
Gradient Based
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