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SHIP STRUCTURES

CODE 66289
ACADEMIC YEAR 2021/2022
CREDITS
  • 6 cfu during the 2nd year of 9268 YACHT DESIGN(LM-34) - LA SPEZIA
  • SCIENTIFIC DISCIPLINARY SECTOR ING-IND/02
    LANGUAGE English
    TEACHING LOCATION
  • LA SPEZIA
  • SEMESTER 1° Semester
    MODULES This unit is a module of:
    TEACHING MATERIALS AULAWEB

    OVERVIEW

    The course deals with application of the finite element method in ship structural analysis and design. It includes first engineering principles of the method as well as hints for practical applications.

    AIMS AND CONTENT

    LEARNING OUTCOMES

    The course aims at illustrating criteria and methods for limit state checks of ship and marine structures in general with emphasis on pleasure crafts and yachts, carried out according to shipbuilding fundamental principles and to classification societies rules. Typical case studies are solved either applying analytical and finite element methods, presenting loading actions on structures as well as global and local checks generally adopted in design common practice.

    AIMS AND LEARNING OUTCOMES

    Students will be able to apply the finite element method for ship structural design and analysis. A well rounded knowledge, ranging from theoretical basis and lasting with application cases is provided. Moreover, the concept of limit state design, implying different scantling checks, is illustrated encompassing not only typical strength checks but also verifications related to service of pleasure crafts and yachts structures.

    PREREQUISITES

    Knowledge of main theories of structural mechanics (advanced course)

    TEACHING METHODS

    Lectures and guided exercises in IT class. Totally, 60 hours of lectures, almost equally divided.

    SYLLABUS/CONTENT

    Introduction: structural mechanics models (beam, shell theory), finite element method. Limit state checks and application of structural models to ship and offshore structures

    Modern rule checks: IMO Goal Based Standards, rule scantling checks, general principles and idealization of structural components, models selection depending on check types, definition of actions and application to structural models, relevant implications and approximations.

    Structural modeling: analytical and numerical models, 2D and 3D models (frames, grillages, plates, orthotropic plates, stiffened panels, complex models). Finite element modeling strategies. Local and global models, primary, secondary and tertiary strength, interaction of structural models.

    Analysis types: static linear, collapse (nonlinear), buckling and modal (Eigenvalues), dynamic in time domain (hints). Post-processing, critical analysis and presentation of results.

    • Planned exercises (to be discussed during the examination):

    a) Introduction to FEM software (Kirsch problem, frames, grillages, etc.)

    b) Scantling checks on a typical stiffened panel (e.g. deck panel with boundary conditions on bulkheads and side shell)

    c) Scantling check of a ship transverse section (e.g. web frame of a longitudinally framed ship)

    d) Three dimensional model according to classification societies rules

    e) Scantling checks of stress concentration factors and fatigue assessment of typical structural details

    f) Application example of a dynamic analysis (voluntary and variable each academic year)

    RECOMMENDED READING/BIBLIOGRAPHY

    1. Classification societies rules for ships and offshore structures (www.iacs.org.uk), with emphasis on the recently issued IACS Harmonized Common Structural Rules and pleasure craft and yacht rules
    2. Hughes OF, Paik JK (2010): Ship structural analysis and design, SNAME (ISBN No. 978-0-939773-78-3)
    3. Lamb T. Editor (2004): Ship Design and Construction, SNAME (ISBN 0-939773-41-4)
    4. Lewis EV Editor (1988): Principles of Naval Architecture, SNAME (ISBN-13: 978-0939773008)
    5. Mansour A, Liu D (2008): Strength of Ships and Ocean Structures, SNAME (ISBN No. 0-939773-66-X)
    6. Okumoto Y, Takeda Y,·Mano M, Okada T (2009): Design of Ship Hull Structures, Springer (ISBN: 978-3-540-88444-6)

    TEACHERS AND EXAM BOARD

    Exam Board

    CESARE MARIO RIZZO (President)

    MASSIMO FIGARI

    DARIO BOOTE (President Substitute)

    MICHELE MARTELLI (President Substitute)

    TATIANA PAIS (President Substitute)

    RAPHAEL ZACCONE (President Substitute)

    LESSONS

    Class schedule

    All class schedules are posted on the EasyAcademy portal.

    EXAMS

    EXAM DESCRIPTION

    Practical application on software + Oral (including discussion of exercises carried out during the course). Further details will be given during lectures, including practical exam trials.

    ASSESSMENT METHODS

    Practical exam will be checked considering structural idealization issues, input for modeling and analysis of results. A short technical report is required and it will be checked for completeness and clarity. Oral examination will start discussing the practical exercise and will continue to ascertain comprehension of theoretical content of the course.

    Exam schedule

    Date Time Location Type Notes
    20/12/2021 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor
    20/01/2022 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor
    16/02/2022 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor
    09/06/2022 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor
    06/07/2022 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor
    14/09/2022 09:00 LA SPEZIA Scritto + Orale Professors are available for further exam dates upon request (at least 1 week in advance to arrange the session) Il docente è disponibile per esami in altre date previa richiesta con congruo anticipo (almeno 1 settimana al fine di organizzare la sessione). Inizio esame sessione del 9 giugno posposto al 10 Giugno ore 9 (La Spezia) causa impegno istituzionale del docente The 9 June exam is postponed to 10 June at 9:00 in La Spezia because of other institutional duties of the professor

    FURTHER INFORMATION

    Preferably, contact professors by e-mail