Chianese, Claudia (2025) Isogeometric methods for structural analysis and optimization in ship and offshore engineering. [Tesi di dottorato]
![[thumbnail of chianese_claudia_38.pdf]](https://www.fedoa.unina.it/style/images/fileicons/other.png "chianese_claudia_38.pdf") |
Documento PDF
chianese_claudia_38.pdf Visibile a [TBR] Amministratori dell'archivio Download (12MB) | Richiedi una copia |
| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Isogeometric methods for structural analysis and optimization in ship and offshore engineering |
| Autori: | Autore Email Chianese, Claudia claudia.chianese@unina.it |
| Data: | 10 Dicembre 2025 |
| Numero di pagine: | 152 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Strutture per l'Ingegneria e l'Architettura |
| Dottorato: | Ingegneria strutturale, geotecnica e rischio sismico |
| Ciclo di dottorato: | 38 |
| Coordinatore del Corso di dottorato: | nome email Iervolino, Iunio iunio.iervolino@unina.it |
| Tutor: | nome email Rosati, Luciano [non definito] |
| Data: | 10 Dicembre 2025 |
| Numero di pagine: | 152 |
| Parole chiave: | Embedded beams; Floating solar panels; Isogeometric analysis; Kirchhoff-Love shells; Single-objective optimization; Navier solids; Nested NURBS parameterization; Pucher shells |
| Settori scientifico-disciplinari del MIUR: | Area 08 - Ingegneria civile e Architettura > ICAR/08 - Scienza delle costruzioni Area 09 - Ingegneria industriale e dell'informazione > ING-IND/02 - Costruzioni e impianti navali e marini |
| Informazioni aggiuntive: | Ciclo 38 |
| Depositato il: | 22 Gen 2026 13:21 |
| Ultima modifica: | 08 Ago 2026 03:29 |
| URI: | https://www.fedoa.unina.it/id/eprint/16020 |
Abstract
IsoGeometric Analysis (IGA) is an emerging computational technique with the goal of providing a monolithic treatment of geometry and analysis by employing the spline modelling tools of Computer-Aided Design as the foundation for simulation using the principles of the Finite Element Method. The approach enables major benefits, namely a simplified pre-processing workflow and improved accuracy per degree of freedom, emanating from the feasibility of bypassing the time-consuming mesh creation stage and preserving exact geometry at all levels of grid refinement. With the aim of promoting a consolidated actualisation of such a unified paradigm in the regular industrial practice, advanced isogeometric methods for structural analysis and optimization are presented in this dissertation with specific pertinence to the field of ship and offshore engineering. From the analysis perspective, the performance of IGA is examined relative to a commercial FEM solver within the geometrically linear and nonlinear static assessment of thin-walled shell structures using either Navier solid or Kirchhoff-Love shell element formulations. Use is made of multi-patch modelling to extend the smoothness of spline spaces over complex geometric topologies. Furthermore, local enhancements are accounted for in the novel setting of the embedment concept, according to which slender ribs are modelled as univariate curves nested inside the bivariate parameterization of the underlying shell mid-surface. Using the aforementioned embedment concept, a novel isogeometric optimization strategy driven by semi-analytical sensitivities is developed and applied to the case study of an offshore photovoltaic panel to determine the optimal combination of floater shape and rib-network topology enabling hydrostatic equilibrium with minimal elastic strain energy. Finally, a new form-finding procedure is proposed to design the shape of Pucher shells exhibiting a selectively membrane load-bearing capacity.
Downloads
Downloads per month over past year
Actions (login required)
 |
Modifica documento |
