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Thursday, July 23, 2020 | History

1 edition of Finite element analysis of the forced oscillations of ship hull forms found in the catalog.

Finite element analysis of the forced oscillations of ship hull forms

by David Arthur Smith

  • 73 Want to read
  • 18 Currently reading

Published by U.S. Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Mechanical engineering

  • ID Numbers
    Open LibraryOL25411051M

    The thesis titled Analysis of Structural Discontinuities in Ship Hull using Finite Element Method Submitted by Kazi Naimul Hoque Student No. 04 I 3 I 2 2OOg P,Session: epril-2b t f, a part time student of Engineering (Naval Architecture and Marine Engineering) has been accepted as satisfactory in partial fulfillment for the degree of Master of Science. engineering analysis of structures. The development of computing capabilities has caused the finite element method to become one of the most popular techniques for solving engineering problems. For analysing a complicated structure like a ship hull, the finite element method is the only tool which is giving satisfactory results. 3.

    In this book, the four authors show us the condensed experience how to design ship hull structures from a practical viewpoint. In three parts, the book presents the fundamentals, the theory and the application of structural design of hulls. The topics are treated comprehensively with an emphasis on how to achieve reliable and efficient ship structures.5/5(1). Finite element modelling and beam analysis have now become an affordable part of a designers tool kit. However in spite of these massive improvements in technology, some shipyards and designers have continued with the old working methods choosing to perform computerised structural analysis only when class societies insist, which.

      Ship structural analysis and design is a matter of com- promises: • compromise between accuracy and the available time to perform the design. This is particularly challenging at the preliminary design stage. A 3D Finite Element Method (FEM) analysis would be .   Ship Hull Part 1 - Method Introduction - Duration: hypersi views. AutoFEM Finite Element Analysis and ShipConstructor: Joint Work (tutorial, English) - Duration:


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Finite element analysis of the forced oscillations of ship hull forms by David Arthur Smith Download PDF EPUB FB2

TABLEOFCONTENTS I. INTRODUCTION 16 ICALBACKGROUND 16 -OrderSolutions 17 lPotentialTheory 17 ElementSolutions 19 -OrderSolutions 20 lPotentialTheory 20 ElementSolutions 22 IVESOFPRESENTRESEARCH 23 II.

Finite element analysis of the forced oscillations of ship. Finite element analysis of ship structures. The combination of Nauticus Hull’s Rule Check calculations and the world-leading finite element analysis capabilities of Sesam provides ship designers and approval engineers with a complete software solution for the entire design and approval process.

Finite Element Analysis of the Forced Oscillations of Ship Hull Forms by David Arthur Smith, X Library, David Arthur Smith, R E. Newton, David Arthur Smith IB. Yucel, Adil, and Arpaci, Alaeddin.

"Analysis of Free and Forced Ship Vibrations Using Finite Element Method." Proceedings of the ASME 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 4.

Istanbul, Turkey. July 12–14, pp. Author: Adil Yucel, Alaeddin Arpaci. Apart from a prescriptive analysis based on local requirements and the analysis of cross sections, a direct ship's strength calculations using finite element analysis (FEA) procedures are.

The Finite Element method of ultimate strength analysis of a damaged hull girder can be a practical tool for the ship hull girder after damages, which has become one of the functional requirements in IMO Goal Based Ship Construction Standard. A grid sensitivity study is done for four different grids with element sizes and numbers shown in Table 2 to reproducing forced roll oscillation tests.

The hull section BK1 of Thiagarajan Krish and Braddock () was used in this study, see Sect. Fig. 5 shows the grid around the bilge keel of Grid 2 of Table is important to comment that the grid refinement around the part of the.

The added mass of two-dimensional cylinders heaving in water of finite depth,L Fluid Mech. 81, Pt 1, 85 21 Smith, D. Finite element analysis of the forced oscillation of ship hull forms, MS Thesis, Naval Postgraduate School, Monterey, CA, 22 Lee, C.

Motion characteristics of floating bodies, J. Ship Res. 20 (4), Gothenburg 3 modern hull forms with reli-able experimental data were introduced to be the validation test cases.

The most general case among them is the containership KCS, a ship of moderate specific speed and fullness. The numerical analysis of the KCS hull flow behavior according to the for-mal procedures of the workshop was carried out. Element Analysis (FEA) also known as Finite Element Model (FEM) can be used for vibration prediction.

Using the FEM and a double hull shaped ship of. The Finite Element method of ultimate strength analysis of a damaged hull girder can be a practical tool for the ship hull girder after damages, which has become one of the functional requirements in IMO Goal Based Ship Construction Standard.

INTRODUCTION A ship’s hull. The finite element method (FEM), or finite element analysis (FEA), is a computational technique used to obtain approximate solutions of boundary value problems in engineering. Boundary value problems are also called field problems.

The field is the domain of interest. by means of a detailed finite element analysis of the overall ship. Both free and forced vibration analyses were performed.

The analyzed pleasure vessel has a total length of m and a maximum beam length of m; it is composed by main, upper and sun decks. All structural components are made of aluminium.

Several simplifying assumptions are made in the finite element idealization of the hull structure. In this study, a three-dimensional finite element model representing the entire ship hull, including the deckhouse and machinery propulsion system, has been developed using solid modeling software for local and global vibration analyses.

selection of critical segments and hull modules have been thoroughly discussed [Hughes]. Global structure model and the hull module model for the finite element analysis of the ship structure have been presented [ISO].

A slice of any ship cross section between two adjacent transverse frames is. Ship structural analysis and design is a matter of com-promises: • compromise between accuracy and the available time to perform the design.

This is particularly challenging at the preliminary design stage. A 3D Finite Element Method (FEM) analysis would be welcome but the time is not available.

For that reason, rule-based design or. Finite Element Analysis (FEA) provides an alternative to physical validation that can be used to increase confidence and insight in simplified model results. This thesis develops a complete methodology for ship-to-ship collision simulations using the explicit non-linear FE code LS-DYNA3D.

Various modeling alternatives are considered. — To give a guidance for finite element analyses and assessment of ship hull structures in accordance with the Rules for Classification of Ships.

— To give a general description of relevant finite element analyses. — To achieve a reliable design by adopting rational analysis. Sponsored by the Ship Structure Committee and its member agencies.

Abstract Finite element analysis (FEA) is the most common structural analysis tool in use today. In marine industries, the use of this technique is becoming more widespread in the design, reliability analysis and performance evaluation of ship structures.

Finite Element Analysis (FEA) is a powerful tool used for analysis of ship vibrations that result from various sources to assess ‘habitability’ vibration response (i.e. vibrations that would affect crew/passenger comfort) as well as vibration induced fatigue. Vibration analyses using finite element methods have become standard practice.Marine propulsion shafting connects the main engine and propeller, and plays an important role in promoting the movement of ships.

Along with the operation of shafting system, various vibration forms couple with each other and cause different kinds of coupled vibrations, which seriously threaten the safety and reliability of ships. In this paper, a finite element model of marine propulsion.Detailed aspects of finite element modeling and analysis are discussed by Fricke FAT has been proposed for the design S–N curve of steel structures in this effective notch‐stress approach (Hobbacher, ).

It has to be emphasized that notch stresses may exceed far the yield stress.