A Study on the Whipping Phenomena Effect on the Structural Response of Large Container Ships

There is limited long term service experience with the modern generation of large container carriers and hence there is great interest in improving our understanding of the performance of these vessels. In an effort to assess the actual structural service performance of a large container carrier, a comprehensive full-scale measurement system was developed to measure the wave environment, ship motions and structural response. The system was installed on an 8063 TEU container carrier built in 2006, and the first year measurement campaign has successfully been completed. This paper presents a summary of noteworthy observations during the first year’s voyage records which includes ship motion, wind and wave conditions, and hull girder strains and derived hull girder bending and torsional moments. The observed vibratory responses of the hull girder are also presented.

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Green Water Assessment for Marine and Offshore Applications: Structural Response of the ULCS Breakwater

Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics ◽

10.1115/omae2018-78432 ◽

2018 ◽

Author(s):

Šime Malenica ◽

Byung Hyuk Lee ◽

Nikola Vladimir ◽

Inno Gatin ◽

Charles Monroy ◽

...

Keyword(s):

Structural Integrity ◽

Structural Response ◽

Green Water ◽

Floating Body ◽

Water Loading ◽

Structure Interaction ◽

Final Design ◽

Numerical Tools ◽

Large Container ◽

Water Assessment

Green water loading which occurs during the floating body operations in heavy weathers can be very dangerous for the structural integrity of the superstructures and the equipment’s located at the upper decks. The correct modeling of the green water loading and the corresponding structural response is far from trivial and many different physical aspects need to be taken into account at the same time. Depending on the type of the floating body, the overall procedure involves the use of the different numerical tools at different steps. For off-shore type structures the procedure is slightly more complicated than for ships because, in addition to the classical seakeeping simulations, the mooring software also needs to be used. In all cases the final design conditions should be modeled using the complex hydro-structure interaction tools. In the present work the overall methodology is demonstrated and applied to the case of the evaluation of the structural response of the breakwater on the Ultra Large Container Ship (ULCS).

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Structural Design Of Ultra Large Ships Based On Direct Calculation Approach

Journal of Maritime & Transportation Science ◽

10.18048/2016.00.63 ◽

2016 ◽

Vol Special edition (1) ◽

pp. 53-79

Author(s):

Nikola Vladimir ◽

Ivo Senjanović ◽

Šime Malenica ◽

Jérôme De Lauzon ◽

Hongil Im ◽

...

Keyword(s):

Structural Design ◽

Numerical Procedure ◽

Structural Response ◽

Direct Calculation ◽

Theoretical Models ◽

3D Fem ◽

South Korean ◽

Bulk Carriers ◽

Numerical Tools ◽

Large Container

The trend in modern sea transportation is building of ever larger ships, which require application of different direct calculation methodologies and numerical tools to achieve their reliable structural design. This is particularly emphasized in case of ultra large container ships (ULCS), but also other ship types like bulk carriers or large LNG ships belong to this category. In this context some classification societies have developed guidelines for performing direct calculations and for that purpose there are several hydro-structure tools available around the world, mainly relying on the same theoretical assumptions, but having incorporated different numerical procedures. Such tools are mostly based on the application of the 3D potential flow theoretical models coupled with the 3D FEM structural models. This paper illustrates application of general hydro-structure tool HOMER (BV) in the assessment of ship structural response in waves. An outline of the numerical procedure based on the modal approach is given together with basic software description. Application case is 19000 TEU ULCS built in South Korean shipyard Hyundai Heavy Industries. Extensive hydroelastic analyses of the ship are performed, and here some representative results for fatigue response with linear springing influence are listed.

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Structural Response to the Saturation of Hexagonal Cobaltate YBaCo4O7 + x Crystals with Oxygen

Химия в интересах устойчивого развития ◽

10.15372/khur20160202 ◽

2016 ◽

Keyword(s):

Structural Response

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Influence of the distribution of the shear walls on the seismic response of the buildings

Pollack Periodica ◽

10.1556/606.2020.15.1.4 ◽

2020 ◽

Vol 15 (1) ◽

pp. 37-44

Author(s):

El Mehdi Echebba ◽

Hasnae Boubel ◽

Oumnia Elmrabet ◽

Mohamed Rougui

Keyword(s):

Structural Analysis ◽

Seismic Response ◽

Natural Frequency ◽

Structural Design ◽

Structural Response ◽

Shear Walls ◽

Structural Elements ◽

Analysis Software ◽

Ansys Apdl ◽

The Impact

Abstract In this paper, an evaluation was tried for the impact of structural design on structural response. Several situations are foreseen as the possibilities of changing the distribution of the structural elements (sails, columns, etc.), the width of the structure and the number of floors indicates the adapted type of bracing for a given structure by referring only to its Geometric dimensions. This was done by studying the effect of the technical design of the building on the natural frequency of the structure with the study of the influence of the distribution of the structural elements on the seismic response of the building, taking into account of the requirements of the Moroccan earthquake regulations 2000/2011 and using the ANSYS APDL and Robot Structural Analysis software.

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Analysis and design of thermo-mechanical interfaces

Bulletin of the Polish Academy of Sciences Technical Sciences ◽

10.2478/v10175-012-0027-4 ◽

2012 ◽

Vol 60 (2) ◽

pp. 205-213

Author(s):

K. Dems ◽

Z. Mróz

Keyword(s):

Optimality Conditions ◽

Mechanical Loading ◽

Material Properties ◽

Structural Response ◽

External Boundary ◽

Mechanical Loads ◽

Internal Interface ◽

Analysis And Design ◽

First Order ◽

Mechanical Nature

Abstract. An elastic structure subjected to thermal and mechanical loading with prescribed external boundary and varying internal interface is considered. The different thermal and mechanical nature of this interface is discussed, since the interface form and its properties affect strongly the structural response. The first-order sensitivities of an arbitrary thermal and mechanical behavioral functional with respect to shape and material properties of the interface are derived using the direct or adjoint approaches. Next the relevant optimality conditions are formulated. Some examples illustrate the applicability of proposed approach to control the structural response due to applied thermal and mechanical loads.

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