𝔖 Bobbio Scriptorium
✦   LIBER   ✦

An optimization approach for fairing of ship hull forms

✍ Scribed by Ebru Sariöz

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
838 KB
Volume
33
Category
Article
ISSN
0029-8018

No coin nor oath required. For personal study only.

✦ Synopsis

This paper presents a numerical fairing procedure to be used at the preliminary design stage to create high-quality ship hull form geometry. The procedure is based on a variational optimization approach in which a fairness measure related to the surface curvature is the objective function to be minimized subject to a set of geometric constraints to ensure that the final form has the required geometric characteristics. The optimization variables are selected as the control points of a B-spline surface representing the initial hull form. A nonlinear direct search technique is employed to solve the problem. The methodology is applied for typical ship forms to indicate that, provided that the designer can specify appropriate design objectives and geometric constraints, the methodology can produce alternative hull forms with significantly improved fairing characteristics. The choice of the fairness objective function is shown to have a crucial effect on the quality of the hull surface. Highly nonlinear exact fairness functionals yield surfaces of high quality at the expense of high-computerized effort.

📜 SIMILAR VOLUMES

Geometrical approach for flame forming o
Geometrical approach for flame forming of single curved ship hull plate
✍ Woo-Jae Seong; Junsu Ahn; Suck-Ju Na; Myung-Soo Han; Yu-Chul Jeon 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 932 KB

Ship hull plate forming by flame torch plays an important role in shipbuilding process. In shipyards, the line heating method is one of the major processes carried out by workers to form the plates into desired shapes. Since this process depends on the skilled workers' experiences and knowhow, there

An optimization approach for torsion ana
An optimization approach for torsion analysis of prismatic bars
✍ Meric, R. Alsan 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 152 KB 👁 1 views

Torsion analysis of prismatic bars has been treated by an optimization approach using the twist angle and the boundary values of the stress function as decision parameters. The sensitivity analysis of the objective function is performed by the adjoint variable method. Solution of the primary and adj

Model reduction for chemical kinetics: A
Model reduction for chemical kinetics: An optimization approach
✍ Linda Petzold; Wenjie Zhu 📂 Article 📅 1999 🏛 American Institute of Chemical Engineers 🌐 English ⚖ 278 KB 👁 1 views

## Abstract The kinetics of a detailed chemically reacting system can potentially be very complex. Although the chemist may be interested in only a few species, the reaction model almost always involves a much larger number of species. Some of those species are radicals, which are very reactive spe

An approach for the optimization of tran
An approach for the optimization of transient diffusion cell measurements
✍ Weiruo Sun; Fernão D. Magalhães; Carlos A. V. Costa 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 598 KB

## Abstract In a diffusion cell experiment, the presence of a film diffusion resistance, in series with intrapellet diffusion, leads to loss of precision in the estimation of intrapellet diffusivities. A general strategy, extendable to other problems, for quantifying a parametric region where film

An approximate approach of global optimi
An approximate approach of global optimization for polynomial programming problems
✍ Han-Lin Li; Ching-Ter Chang 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 626 KB

Many methods for solving polynomial programming problems can only find locally optimal solutions. This paper proposes a method for finding the approximately globally optimal solutions of polynomial programs. Representing a bounded continuous variable xi as the addition of a discrete variable dj and