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2007 IEEE International Symposium on Industrial Electronics, 2007
A critical operation for ship maintenance is periodical hull blasting before re-painting. Up to date some partial solutions exist like blasting turbines for vertical surfaces or water blasting units for striping. This paper presents the EFTCoR family of robots, designed by DSIE, that represent an integral solution for hull blasting that achieves the ...
Francisco Ortiz +6 more
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A critical operation for ship maintenance is periodical hull blasting before re-painting. Up to date some partial solutions exist like blasting turbines for vertical surfaces or water blasting units for striping. This paper presents the EFTCoR family of robots, designed by DSIE, that represent an integral solution for hull blasting that achieves the ...
Francisco Ortiz +6 more
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Ship hull inspection by hull-relative navigation and control
Proceedings of OCEANS 2005 MTS/IEEE, 2005MIT and Bluefin Robotics designed the Hovering Autonomous Underwater Vehicle with a focus on ship hull inspection missions for anti-terrorism and force protection. Our hull-relative navigation and control are primarily based on a Doppler velocity Log that the vehicle keeps pointed normal to the hull by means of a tilt actuator.
J. Vaganay +7 more
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Ship hull structural scantling optimization
2017This chapter presents a method to optimize hull girder cross section scantlings using three objectives: structural weight, vertical center of gravity and structural safety. In practice, once the hull envelope and structural arrangements are made to meet the operational requirements, the structural scantlings are initialized by modifying existing ...
K. Stone, T. McNatt
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Efficient strategies to design optimal ship hulls
8th Symposium on Multidisciplinary Analysis and Optimization, 2000Automatic procedures to design ship hull geometries yielding minimal wave resistance and wave breaking are an attractive opportunity from both the economical and practical standpoints. Estimating the cost function gradient according to sensitivity equation and adjoint equation methods instead of using standard finite difference approximations offers ...
VALORANI, Mauro, D. PERI, E. CAMPANA
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Hull beam behaviour of passenger ships
Marine Structures, 1991Abstract Cut-outs for windows in the side plating of passenger ships reduce the shear stiffness of the hull girder considerably. As a consequence the hull girder will not fulfill the requirements of the engineering theory for stesses in beams. A simplified method is proposed for design purposes utilizing the finite element method.
Mats Heder, Anders Ulfvarson
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The assessment of ship hull weight uncertainty
1998The paper considers the assessment of uncertainties of the ship hull steel weight with respect to uncertainties of built-in steel products. First, a general procedure for worst-case approach based on tolerances is presented. A review of tolerances on rolled plates and sections provided for shipbuilding, according to the Classification Societies ...
Žiha, Kalman +2 more
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2015
Titreşim, gemi yapısı ve personel konforu üzerinde yaratabileceği olumsuz etkileri nedeniyle gemi inşa mühendisleri için önemli bir ilgi alanı olmuştur. Titreşimin kompleksliğinin artmasıyla titreşimden kaçınma problemi gittikçe daha da zor hale gelmektedir ve gemi tekne titreşimi gemilerle ilişkili birçok alandan daha çok analitik ve nümerik ...
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Titreşim, gemi yapısı ve personel konforu üzerinde yaratabileceği olumsuz etkileri nedeniyle gemi inşa mühendisleri için önemli bir ilgi alanı olmuştur. Titreşimin kompleksliğinin artmasıyla titreşimden kaçınma problemi gittikçe daha da zor hale gelmektedir ve gemi tekne titreşimi gemilerle ilişkili birçok alandan daha çok analitik ve nümerik ...
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Random Vibration of Ship Hulls
1996Measurements of the bending moment induced stresses in a ship hull when the ship is moving in a sea-way, have revealed a marked asymmetry, cf. Juncher Jensen and Terndrup Pedersen (1979,1981). It has been observed that the longitudinal peak stresses in the bottom plates of the hull are generally larger in tension (sagging) than in compression (hogging).
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