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YACHT STABILITY

CODE 66400
ACADEMIC YEAR 2022/2023
CREDITS
  • 6 cfu during the 1st year of 9268 YACHT DESIGN(LM-34) - LA SPEZIA
  • SCIENTIFIC DISCIPLINARY SECTOR ING-IND/01
    LANGUAGE English
    TEACHING LOCATION
  • LA SPEZIA
  • SEMESTER 1° Semester
    MODULES This unit is a module of:
    TEACHING MATERIALS AULAWEB

    AIMS AND CONTENT

    LEARNING OUTCOMES

    Standards concerning the stability and buoyancy, the leak problem, the rolling movement and stabilisation means, speed effects on the stability.

    AIMS AND LEARNING OUTCOMES

    the course will enalble the capabilities to:

    - design ships (especially passenger ships) in compliance with the most important international rules about buoyancy and stability of ships both in intact and damaged conditions

    - calculate the final equilibrium condition and the relevan stability of a ship in damged condition.

     

    TEACHING METHODS

    Lectures in classrom;

    Practical applications in classrooms.

     

    SYLLABUS/CONTENT

    Safety as a constraint/target in the design of units having passengers as a payload   

    Introduction to the Rule Making environment: IMO, Flag State, Classification Societies.

    The righting arm (RA):

    - relation between  RA and ship main dimensions (midship section)

    - the RA at very high heel angles

    - the down-flooding angle: watertight and weather-tight closures

    - influence on the righting arm deriving from

    • Trim (initial trim, “free to trim”)

    • Wave profile

    The linear roll motion of ship for the evaluation of  the roll period

    Inclining moments:

    - effect of wind

    - effect of turning at speed

    The Intact Stability Code 2008

    - General stability criteria

    - Wave and wind combined effect (whether criterion)

    - Special requirements for passenger ships

    Lightship weigh estimation

    Inclining experiment

    Solutions for the ship in damage:

    - loading of weight  method

    - constant displacement method

    Deterministic methodology for safety subdivision (former SOLAS)

    - Allowable length curve

    Probabilistic methodology for safety subdivision (SOLAS 2009)

    - Required subdivision index R

    - Attained subdivision index A

    - Probabilistic parameter relevant to the damage p,r,v

    - Probabilistic parameter relevant  the ship survivability s

    Grounding

    The stability of underwater vehicles

     

     

    RECOMMENDED READING/BIBLIOGRAPHY

    IMO safety rules relevant to the intact and damaged ship stability.

    TEACHERS AND EXAM BOARD

    Exam Board

    STEFANO GAGGERO (President)

    GIULIANO VERNENGO (President)

    DIEGO VILLA (President)

    LESSONS

    Class schedule

    All class schedules are posted on the EasyAcademy portal.

    EXAMS

    EXAM DESCRIPTION

    Oral exam.

    In order to be admitted to the oral exam, students have to present and discuss with the teacher the two assignements given during the semester in classrooom.

    ASSESSMENT METHODS

    Oral exam: two open questions about the topics developed in classroom during the semester. One of the two questions in relation with the topics of the assignements.

    Questions 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.

    During the (previous) conversation about the assignements, the students will be requested to give evidence of capability to apply in practice the theorethical methodologies with the proper critical attitude toward results.

    Exam schedule

    Date Time Location Type Notes
    09/01/2023 09:00 LA SPEZIA Orale
    23/01/2023 09:00 LA SPEZIA Orale
    06/02/2023 09:00 LA SPEZIA Orale
    07/06/2023 09:00 LA SPEZIA Orale
    20/06/2023 09:00 LA SPEZIA Orale
    11/07/2023 09:00 LA SPEZIA Orale
    11/09/2023 09:00 LA SPEZIA Orale