NDLI: Hydroelastic Response of a Ship Structural Detail to Seakeeping Loads Using a Top-Down Scheme

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sireta, François-Xavier Derbanne, Quentin Bigot, Fabien Malenica, Šime Baudin, Eric
Copyright Year	2012
Abstract	In order to investigate the local response of a ship structure, it is necessary to transfer the seakeeping loading to a 3DFEM model of the structure. A common approach is to transfer the seakeeping loads calculated by a BEM method to the FEM model. Following the need to take into account the dynamic response of the ship to the wave excitation, some methods based on a modal approach have been recently developed that include the dry structural modes in the hydro-structure coupling procedure and allow to compute the springing and whipping response of the ship structure to the seakeeping loads. In the context of the fatigue life assessment of a structural detail, a very fine FE model is required. A very large number of seakeeping loading cases also need to be considered to account for all the conditions encountered by the ship through its life. It becomes then clear that because of the CPU time issue, the whole FE model can not be very fine. This is why a hierarchical top-down analysis procedure is commonly used, in which the global ship structure is modelled in a coarse manner using one finite element between web frames. The structural details are modelled separately using a fine meshing. Such top-down methods are commonly used for the estimation of the quasi-static response of structural details to the seakeeping loads. This paper presents a methodology in which a top-down method is used to estimate the springing response of a ship structural detail loaded with wave pressure, and its fatigue life. The global dry structural modes are transferred to the detail fine model using the shape functions of the finite elements of the global model. The hydrodynamic pressures are computed directly on the fine mesh model, avoiding any interpolation error. The imposed displacements at the fine mesh boundary are computed using the same method that is used to transfer the structural mode shapes, and the local pressure induced loads and inertia loads are applied on the fine mesh nodes. This method is applied for the calculation of the elongation of a strain gauge which is installed in the passage way of an ultra large container ship.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	289
Ending Page	297
Page Count	9
File Format	PDF
ISBN	9780791844892
DOI	10.1115/OMAE2012-83560
Volume Number	Volume 2: Structures, Safety and Reliability
Conference Proceedings	ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2012-07-01
Publisher Place	Rio de Janeiro, Brazil
Access Restriction	Subscribed
Subject Keyword	Dynamic response Fatigue life Inertia (mechanics) Boundary element methods Containers Strain gages Pressure Waves Stress Mode shapes Errors Interpolation Finite element model Ships Finite element analysis Excitation Shapes Elongation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Applying Strip Theory Based Linear Seakeeping Loads to 3D Full Ship Finite Element Models

Global hydroelastic model for LNG ships

Self-Identification Experiments Using Variable Inertia Systems for Flexible Beam Structures

The Effect of Fatigue Loading Spectrum on Crack Propagation in a Ship Detail

Fatigue Damage Assessment of Container Ships Concerning Wave-Induced Torsion

The Effect on Large Container Ships’ Fatigue due to Springing Loads Coupling Horizontal and Torsional Vibrations

Validation of a New Hydroelastic Code for Flexible Floating Structures Moored in Waves

Symmetric Response of a Hydroelastic Scaled Container Ship Model in Regular and Irregular Waves

An Enhanced 1-Way Coupling Method to Predict Elastic Global Hull Girder Loads

Hydroelastic Response of a Ship Structural Detail to Seakeeping Loads Using a Top-Down Scheme

Similar Documents

Applying Strip Theory Based Linear Seakeeping Loads to 3D Full Ship Finite Element Models

Global hydroelastic model for LNG ships

Self-Identification Experiments Using Variable Inertia Systems for Flexible Beam Structures

The Effect of Fatigue Loading Spectrum on Crack Propagation in a Ship Detail

Fatigue Damage Assessment of Container Ships Concerning Wave-Induced Torsion

The Effect on Large Container Ships’ Fatigue due to Springing Loads Coupling Horizontal and Torsional Vibrations

Validation of a New Hydroelastic Code for Flexible Floating Structures Moored in Waves

Symmetric Response of a Hydroelastic Scaled Container Ship Model in Regular and Irregular Waves

An Enhanced 1-Way Coupling Method to Predict Elastic Global Hull Girder Loads

Hydroelastic Response of a Ship Structural Detail to Seakeeping Loads Using a Top-Down Scheme