Role of transverse bulkheads in hull stiffness of large container ships

Senjanović, Ivo; Tomašević, Stipe; Rudan, Smiljko; Senjanović, Tanja

doi:10.1016/j.engstruct.2008.01.016

Cited by 31 publications

(38 citation statements)

References 9 publications

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“…Height of their girders and stools is equal to the (Senjanovi et al 2008). Stiffness of the short engine room structure is reduced, that makes another problem related to large container ships.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of torsion, warping and distortion of large container ships

Senjanović¹,

Vladimir²,

Tomić³

2011

Ocean Systems Engineering

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Abstract. Large deck openings of ultra large container ships reduce their torsional stiffness considerably and hydroelastic analysis for reliable structural design becomes an imperative. In the early design stage the beam model coupled with 3D hydrodynamic model is a rational choice. The modal superposition method is ordinary used for solving this complex problem. The advanced thin-walled girder theory, with shear influence on both bending and torsion, is applied for calculation of dry natural modes. It is shown that relatively short engine room structure of large container ships behaves as the open hold structure with increased torsional stiffness due to deck effect. Warping discontinuity at the joint of the closed and open segments is compensated by induced distortion. The effective torsional stiffness parameters based on an energy balance approach are determined. Estimation of distortion of transverse bulkheads, as a result of torsion and warping, is given. The procedure is illustrated in the case of a ship-like pontoon and checked by 3D FEM analysis. The obtained results encourage incorporation of the modified beam model of the short engine room structure in general beam model of ship hull for the need of hydroelastic analysis, where only the first few natural modes are of interest.

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Section: Introductionmentioning

confidence: 99%

“…By substituting relevant formulae for the forces and displacements from Section 2 into (35) the system of algebraic equations is formulated and its analytical solution reads (36) where The ship lateral plan and midship section are shown in (Senjanovi et al 2008). The engine room is located ca.…”

Section: Torsion Of a Segmented Girdermentioning

confidence: 99%

Investigation of torsion, warping and distortion of large container ships

Senjanović¹,

Vladimir²,

Tomić³

2011

Ocean Systems Engineering

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show abstract

“…This problem for container ships is extensively analyzed in (Senjanović et al 2008b), where torsional modulus of ship cross-section is increased proportionally to the bulkhead strain energy. The bulkhead is considered as an orthotropic plate with very strong stool (Szilard, 2004).…”

Section: Contribution Of Transverse Bulkheads To Hull Stiffnessmentioning

confidence: 99%

“…The bulkhead grillage strain energy includes vertical and horizontal bending with contraction, and torsion (Senjanović et al 2008b). …”

Section: Contribution Of Transverse Bulkheads To Hull Stiffnessmentioning

confidence: 99%

Safety of ice-strengthened shell structures of ships navigating in the Baltic Sea

2010

Advanced Ship Design for Pollution Prevention

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“…Obtaining correct masses for the quarks and the charged leptons requires at least two Higgs multiplets. It has been noted, for example in [8], that any one of the combinations (10 H , 120 H ), (10 H , 126 H ), or (120 H , 126 H ) can, in principle, be utilized. Among these the model with 10 H and 126 H has been extensively considered as the most successful candidate for the minimal SO(10) GUT [9].…”

Section: Introductionmentioning

confidence: 99%

An SO(10) model with adjoint fermions for double seesaw neutrino masses

2011

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An SO(10) model where the 10 H and 120 H representations are used for generating fermion masses is quite predictive, though due to the absence of SU (2) L,R triplet/singlet fields it cannot give rise to neutrino masses through the usual type-I or type-II seesaw mechanisms. In this paper for neutrino masses we propose an extension of such an SO(10) model by adding fermions in the adjoint representation (45 F ) and a symmetry breaking scalar 16 H . The 16 H couples the adjoint fermions to the standard fermions in 16 F and induces neutrino masses through the 'double seesaw' mechanism. In order to enhance the predictivity of the model we impose µ − τ flavour symmetry on the Yukawa matrices for 10 H and 16 H whereas for the 120 H it is assumed to be antisymmetric. We discuss the conditions that the mass matrices must obey so that the model can reproduce the tri-bimaximal mixing pattern.

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Role of transverse bulkheads in hull stiffness of large container ships

Cited by 31 publications

References 9 publications

Investigation of torsion, warping and distortion of large container ships

Investigation of torsion, warping and distortion of large container ships

Safety of ice-strengthened shell structures of ships navigating in the Baltic Sea

An SO(10) model with adjoint fermions for double seesaw neutrino masses

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