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SHIP STABILITY

CODE 101123
ACADEMIC YEAR 2022/2023
CREDITS
  • 9 cfu during the 1st year of 10948 MARITIME SCIENCE AND TECHNOLOGY(L-28) - GENOVA
  • SCIENTIFIC DISCIPLINARY SECTOR ING-IND/01
    LANGUAGE English
    TEACHING LOCATION
  • GENOVA
  • SEMESTER 2° Semester
    TEACHING MATERIALS AULAWEB

    OVERVIEW

    The course deals with the ship buoyancy and stability, with a specific focus on the operational aspects of the ship. Topics are going to be treated both from a theroetical and a practical point of view. The matter plays a siginficant  role in the context of ship safety. 

    AIMS AND CONTENT

    LEARNING OUTCOMES

    The course provides knowledge about the buoyancy and the stability of ships, both in intact and damaged conditions, with appropriate reference to relevant IMO regulations. Specific attention will be given also to some operational aspects e.g. to cargo handling and stowage.

    AIMS AND LEARNING OUTCOMES

    The course enables the capability of:

    - Evaluate the ship equilibrium in a specific laoding condition and the evaluation of the relevant stability as well;

    - Prrevent dangerous situations in relation with shift and lift of weights, liquid free surface and inclining effects

    - Understand the basic physics of a ship in damaged condition

    - Understand the stability requirements for a ship in intact or damage condition

    PREREQUISITES

    -

    TEACHING METHODS

    Lectures in classroom;

    practical applications together and individually;

    interactions and discussion on some selected topics.

     

    Working students and students with certified SLD (Specific Learning Disorders), disability or other special educational needs are advised to contact the teacher at the beginning of the course to agree on teaching and examination arrangements so to take into account individual learning patterns, while respecting the teaching objectives.

    SYLLABUS/CONTENT

    • Introduction to the concept of safety;  FLAG STATE, PORT STATE, IMO (Conventions and Codes), IACS
    • First order moments (of area, mass,…)
    • Moment of inertia - second order moments (or area, mass,…)
    • Introduction to lines plan – offset
    • Hydrostatics
    • Bonjean Tables
    • Cross Curves
    • Archimedes Principle
    • The calculation of the ship weight
    • Loading and unloading of weights
    • Shift of weights on board
    • The ship equilibrium
    • The metacentric methodology for the ship equilibrium calculation
    • Euler’s theorem
    • The nature of equilibrium: ship stability
    • Metacentric height
    • Comments on the roll period
    • Righting moment and righting arm
    • Heeling moment due to the shift of weight in the transverse plan (Y,Z)
    • Wind heeling moment 
    • Heeling moment due to turning at high speed
    • Free surface correction
    • Lightship weight evaluation
    • Inclining test
    • Intact Stability code
    • IS Code – specific focus on weather criterion
    • The constant displacement method for the evaluation of the equilibrium condition of a ship in damages condition
    • Considerations about deterministic SOLAS requirements
    • Considerations about probabilistic SOLAS 2009
    • Grounding

    RECOMMENDED READING/BIBLIOGRAPHY

    The IMO safety rules relevant to the intact and damaged ship stability that are available on aulaweb.

    "Ship Hydrostatics and Stability" A.B. Biran - Technion - Faculty of Mechanical Engineering. Butterworth-Heinemann 2003. (Be careful about notations that might be different)

    TEACHERS AND EXAM BOARD

    Exam Board

    PAOLA GUALENI (President)

    NICOLA PETACCO

    BENEDETTO PIAGGIO (President Substitute)

    FEDERICO SILVESTRO (President Substitute)

    LESSONS

    Class schedule

    All class schedules are posted on the EasyAcademy portal.

    EXAMS

    EXAM DESCRIPTION

    Oral exam: discussion of an assignement * previously developed and questions about the topics developed during the semester

    *Assignement is about basic application of ship hydrostatics and stability (practical calculations)

    ASSESSMENT METHODS

    With the wrtten assignement, students will be requested to give evidence about capability to apply in practice the theorethical methodologies with the proper critical attitude toward results.

    Questions of the oral test are aimed to assess the capability of the students to discuss about theorethical and practical aspects of ship hydrostatics and stability.

    Specific attention will be given to the capability of indicating the basic assuptions together with the input data, the target of the procedure and its rational developement.

     

    Exam schedule

    Date Time Location Type Notes
    19/01/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    01/02/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    16/02/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    13/06/2023 14:30 GENOVA Orale A written assignments is to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignment has been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    27/06/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    18/07/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.
    13/09/2023 09:30 GENOVA Orale Two written assignments are to be delivered five days before the date of the oral exam, in order to be admitted to the oral exam. The assignments have been described in details during the semester and the text is available on aulaweb. The contents of the assignment are going to be discussed during the oral exam.