Effect of weld modelling on crashworthiness optimization

Mihkel Körgesaar, Jani Romanoff, Petri Varsta, Luc St-Pierre

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)


Design of ship structures that can absorb more energy during accidental loading scenarios without rupture contribute to the safety at sea. Therefore, innovative structural solutions have been sought for and implemented in practice, which have better crashworthiness properties compared with traditional stiffened panels. The enhanced characteristics are achieved through structural topology changes that lead to better energy absorption characteristics. To find the topologies with the best characteristics, optimization algorithms are commonly used. In this paper, we explore how these “best” designs are affected by the assumption made in modelling the structural joints such as welds and heat-affected zone. Web-core steel sandwich panels are optimized for maximum Energy per Mass (E/M) ratio until fixed penetration depth. Two alternative modelling techniques are compared, one where welds are considered and the other without welds. The differences in response and resulting best designs are discussed and presented.
Original languageEnglish
Title of host publicationTrends in the Analysis and Design of Marine Structures: Proceedings of the 7th International Conference on Marine Structures (MARSTRUCT 2019, Dubrovnik, Croatia, 6-8 May 2019)
EditorsC. Guedes Soares, J. Parunov
PublisherCRC Press
Number of pages7
ISBN (Print)9780367278090
Publication statusPublished - 16 May 2019
MoE publication typeA4 Conference publication
EventInternational Conference on Marine Structures - Dubrovnik, Croatia
Duration: 6 May 20198 May 2019
Conference number: 7

Publication series

NameTrends in the Analysis and Design of Marine Structures - Proceedings of the 7th International Conference on Marine Structures, MARSTRUCT 2019


ConferenceInternational Conference on Marine Structures
Abbreviated titleMARSTRUCT


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