Showing papers in "Marine Structures in 2015"

TL;DR: In this paper, the authors investigated the necessary simulation duration, number of realisations and bin sizes for the discretisation of the joint wind and wave distribution for fatigue assessment of the tower and platform members of a three-column semi-submersible.

TL;DR: In this paper, a series of shake table model tests of scale 30:1 have been carried out by the contemporary world unique facility (Earthquake, Wave and Current Joint Simulation System) to investigate the structural response in dry flume, low and high calm water levels, with and without regular or random waves.

TL;DR: In this article, the authors used a pendulum model to describe the motion of a submerged floating tunnel with a single vertical mooring and a simple slack condition which causes the tunnel to be unstable was proposed.

TL;DR: In this paper, an efficient FE computation which is an elastic FE analysis based on inherent deformation method, is proposed to predict welding induced buckling with employing large deformation theory, and an application in ship panel production is carried out.

TL;DR: In this article, an autodyn-based numerical simulation was conducted to investigate the dynamic response of core sandwich panels to air blast loading in an explosion tank considering three levels of blast loading and found that the maximum deflection, core web buckling and core compaction increased as the decrease of stand-off distance.

TL;DR: In this article, the fracture response in a collision scenario together with the discretization of the model is discussed and compared using a validation approach with different model scales; including material tests, indentation experiments and simulations of an actual full-scale collision event.

TL;DR: In this paper, the feasibility of using a 5MW drivetrain which is designed for a land-based turbine, on floating wind turbines is investigated. And the results suggest that the main bearings sustain more damage in floating wind turbine than on land-base.

TL;DR: In this paper, a flexible cylinder in oscillatory flow was experimentally investigated in an ocean basin and the fatigue damage caused by VIV was calculated based on rainflow counting and a standard S-N curve.

TL;DR: In this paper, a series of vertical (uplift) and axial pullout tests were carried out on model pipe segments buried in soft clay deposit similar to that present in Bohai Gulf, China.

TL;DR: In this article, a semi-empirical method for time domain simulation of vortex-induced vibrations (VIV) is used to calculate the in-line and cross-flow fatigue damage of a tensioned riser in uniform and sheared flow.

TL;DR: In this article, the authors define a procedure for the numerical simulation of the response of ship structures under accidental loading conditions, which suffer various different modes of failure, such as tension, bending, tearing and crushing and in particular to investigate the effect of material modeling.

TL;DR: In this article, the authors present experimental assessment of crack growth rates of S355J2+N steel in a corrosion fatigue environment similar to what is experienced on offshore wind farm monopile structures under various cyclic load frequencies in order to assess the effect of cyclic frequency of the applied loading within a frequency range pertinent to the structure.

TL;DR: In this article, the authors used the nominal stress system and the notch stress system to analyze the fatigue data for butt-welded joints in as-wewned condition and under constant amplitude tensile loading (secondary bending included).

TL;DR: In this article, the authors evaluated the effectiveness of different low transformation temperature (LTT) weld wires using TEP-FEM and the contour method (CM) to predict residual stresses after welding.

TL;DR: In this article, a mathematical model employed to analyze the global dynamics of a Steel Catenary Riser (SCR) taking into account the interaction with the seafloor and the effect of the soil reaction forces is established.

TL;DR: In this paper, structural reliability concepts are used in conjunction with limit state functions proposed in the Recommended Practice DNV-RP-F101 (2010) to evaluate the probability of failure of corroded pipelines during their lifetimes.

TL;DR: In this article, a comprehensive static strength test program using longitudinal and transverse shear specimens according to AWS B4.0 Standards has been conducted in support of the development of improved fillet weld sizing criteria for lightweight shipboard structures.

TL;DR: In this article, a total simulation system combing load calculation and structural collapse analysis is applied to simulate progressive collapse behaviour of a single-hull Kamsarmax type bulk carrier.

TL;DR: In this article, a set of analytical expressions for the calculation of damage opening sizes in tanker groundings were given for the grounding force, longitudinal structural damage and the opening width in the inner and outer plating of a tanker's double bottom.

TL;DR: In this paper, the structural response of flexible pipes when subjected to axisymmetric loads, including the effect of both internal and external pressure in pipe displacements, is investigated.

TL;DR: In this paper, the authors evaluate, compare and verify the limitations and relevance of the Proctor/Fagerberg, Flow Table and Penetration test methods that are used to determine the Transportable Moisture Limit (TML) of IOF.

TL;DR: In this article, an analytical method based on plastic mechanism equations for the rapid prediction of the response of a ship's side structure subjected to raked bow collisions is proposed, which includes deformation mechanisms of the side shell plating and the stiffeners attached.

TL;DR: In this article, a simplified analytical method is presented to examine the crushing resistance of ship web girders subjected to local static or dynamic in-plane loads, where the folding deformation is divided into two parts, plastic deformation and elastic buckling zones, which are not taken into account for in the existing models.

TL;DR: In this article, a finite element model estimating mechanics of unbonded flexible risers' bending is proposed, where couplings between bending moment and axial stress as well as contact interaction among layers and tendons have been considered.

TL;DR: In this paper, a simplified analytical method is presented to examine the energy absorbing mechanisms of intact and damaged small-scale stiffened plate specimens, quasi-statically punched at the mid-span by a rigid wedge indenter.

TL;DR: In this paper, a simple instability onset criterion for the external plastic layer, namely, the polymer intrinsic yielding limit stress, is proposed and assessed, analytically, numerically and experimentally for HDPE tubes.

TL;DR: In this article, strain rate sensitive constitutive models were developed for two types of steel commonly utilized in marine construction in the United States (ASTM A36 and ASTM A1011) and tension tests were conducted over a wide range of strain rates (7.00×10 −5 −5 ǫs −1 − 250 s −1 ) spanning from quasistatic to intermediate and high rates that are typically associated with vessel-structure impact events.

TL;DR: In this article, a theoretical model is introduced for structural performance of stiffeners on double-bottom longitudinal girders in a shoal grounding accident, where major emphasis is placed on establishing the characteristic deformation mechanism and identifying major energy dissipation patterns.

TL;DR: In this article, an experiment of hull girder model subjected to near field underwater explosion at midship is implemented, where high-speed photography is applied to achieve the time history of hog displacement of hull Girder model and determination method of hog distortion using these show-motion pictures.

TL;DR: In this article, a series of FE numerical simulations are performed with the aim of providing a clearer understanding on the strain energy dissipation phenomenon, particularly upon the ship-structure interaction.