Shape optimization of truss-stiffened shell structures with variable thickness

Marko Kegl (Author), Boštjan Brank (Author)

Abstract

This paper presents an effective approach to shape optimal design of statically loaded elastic shell-like structures. The shape parametrization is based on a design element technique. The chosen design element is a rational Bézier body, enhanced with a smoothly varying scalar field. A body-like designelement makes possible to unify the shape optimization of both pure shells and truss-stiffened shell structures. The scalar field of the design element is obtained by attaching to each control point a scalar quantity, which is an add-on to the position and weight of the control point. This scalar field is linked to the shell thickness distribution, which can be optimized simultaneously with the shape of the shell. For linear and non-linear analysis of shell structures, a reliable 4-node shell finite element formulation is utilized. The presented optimization approach assumes the employment of a gradient-based optimization algorithm and the use of the discrete method of direct differentiation to perform the sensitivity analysis.Four numerical examples of shell and truss-stiffened shell optimization are presented in detail to illustrate the performance of the proposed approach.

Keywords

mehanika konstrukcij;optimiranje oblike;lupine;paličje;Bézierjevo telo;numerične metode;optimalno projektiranje;mechanics of structures;shape optimization;shells;trusses;Bézier body;numerical methods;optimum design;

Data

Language:	English
Year of publishing:	2006
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	624.074.43:519.61/.64
COBISS:	10296342
ISSN:	0045-7825
Views:	34
Downloads:	18
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary keywords:	mehanika konstrukcij;optimiranje oblike;lupine;paličje;Bézierjevo telo;numerične metode;optimalno projektiranje;
URN:	URN:SI:UM:
File type:	application/pdf
Type (COBISS):	Not categorized
Pages:	str. 2611-2634
Volume:	ǂVol. ǂ195
Issue:	ǂiss. ǂ19/22
Chronology:	2006
DOI:	doi:10.1016/j.cma.2005.05.020
ID:	8717316