NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Shape design sensitivity analysis and optimization of three dimensional elastic solids using geometric modeling and automatic regriddingAn automatic regridding method and a three dimensional shape design parameterization technique were constructed and integrated into a unified theory of shape design sensitivity analysis. An algorithm was developed for general shape design sensitivity analysis of three dimensional eleastic solids. Numerical implementation of this shape design sensitivity analysis method was carried out using the finite element code ANSYS. The unified theory of shape design sensitivity analysis uses the material derivative of continuum mechanics with a design velocity field that represents shape change effects over the structural design. Automatic regridding methods were developed by generating a domain velocity field with boundary displacement method. Shape design parameterization for three dimensional surface design problems was illustrated using a Bezier surface with boundary perturbations that depend linearly on the perturbation of design parameters. A linearization method of optimization, LINRM, was used to obtain optimum shapes. Three examples from different engineering disciplines were investigated to demonstrate the accuracy and versatility of this shape design sensitivity analysis method.
Document ID
19870016938
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Yao, Tse-Min
(Iowa Univ. Iowa City, IA, United States)
Choi, Kyung K.
(Iowa Univ. Iowa City, IA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.26:181099
TR-87-1
NASA-CR-181099
Accession Number
87N26371
Funding Number(s)
CONTRACT_GRANT: NSF MSM-83-19871
CONTRACT_GRANT: NAG1-215
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available