aalto1 untyped-item.component.html

Optimisation of passenger ship structures in concept design stage

Thumbnail Image

Access rights

openAccess
acceptedVersion

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)

Authors

Date

2019-10-03

Department

Department of Energy and Mechanical Engineering

Major/Subject

Mcode

Degree programme

Language

en

Pages

15

Series

Ships and Offshore Structures, Volume 14, issue sup1, pp. 320-334

Abstract

This paper presents an optimization method for concept design state of passenger ship with focus on utilisation of efficient Finite Element Modelling, evolutionary optimisation algorithm and indirect constraint relaxation. The response is analysed using 3D coarse mesh global finite element (FE) model, where stiffened panels are modelled using equivalent single layer (ESL) elements and the primary stiffeners are modelled with offset beam elements. The simplifications on stiffened panels and beams enable exploration of design space without changing the FE-mesh. The strength is defined based on classification society rules. Local stress peaks are allowed to exceed the rule-based strength limits, i.e. stress constraints are relaxed indirectly. Instead of increasing the allowed stress levels, the amount of material exceeding strength criteria is utilised. Optimization is based on Particle Swarm Optimization (PSO) algorithm with objective to reduce steel weight. The results show that stress relaxation has significant effect on the obtained total mass.

Description

Keywords

Optimisation, equivalent single layer (ESL) theory, equivalent element, particle swarm optimisation, global finite element model, passenger ship, constraint relaxation, TOPOLOGY OPTIMIZATION, RELAXATION

Other note

DOI

10.1080/17445302.2019.1590947

Citation

Raikunen, J, Avi, E, Remes, H, Romanoff, J, Lillemäe-Avi, I & Niemelä, A 2019, 'Optimisation of passenger ship structures in concept design stage', Ships and Offshore Structures, vol. 14, no. sup1, pp. 320-334. https://doi.org/10.1080/17445302.2019.1590947

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201908154821

Collections

[article-cris] Insinööritieteiden korkeakoulu / ENG

Endorsement

Review

Supplemented By

Referenced By