... of hydrogen damage and it effects to mechanical properties are presented. Hydrogen enhanced fatigue mechanism is clearly presented and related testing methods are introduced. Recent investigations of pipeline steels reveal that 67.7% reduction of fatigue strength due to increment of hydrogen pressure...

... in the weld metal of the SUS316L was studied to qualify the changes in the brittle areas according to the hydrogen content and the addition of pre-strain. The loss of ductility and reduction of strengths were observed as the brittle area decreased due to the combination of internal and external hydrogen...

... ABSTRACT In order to reveal the drag reduction mechanism of air layer, an experimental study was carried out on a large flat plate. The influence of water depth on the resistance of the plate and the formation of air layer under the plate are discussed. The research and development of the test...

... and configurations: fully transom length, partially near keel, and partially near side. Each configuration then investigated in three different AoA with the same deployment depths. The results show the benefits of AoA adjustment on the interceptors in total barehull drag reduction from 0.6% to 19.8% at F n...

... on a TLP, with and without TMD and the surge responses are compared to assess the effectiveness of the control. Results show that the RMS value of surge response is effectively reduced for a mass ratio of 0.3. It also showed the maximum reduction in the surge amplitude, about 30%; higher mass ratios did...

... to allow for the design of riser systems in challenging environments. reduction girth weld fatigue testing plane united states government pipe sample 2 resonant fatigue testing fatigue life wfe sample 1 weld thickness stress engineering service upstream oil & gas bend test stress...

... property density window china government drilling fluid selection and formulation salt-paste layer outer diameter asia government geologist casing design drilling fluid management & disposal drilling fluid chemistry centralizer small collar reduction geology safety density window fluid...

... been tested under regular wave conditions aiming at providing a first experimental insight on the reduction/increase of the forces/pressures acting on the whole structure, the wall and the caisson trunk due to the wall retreat. INTRODUCTION Composite vertical breakwaters are monolithic structures...

... hydrogen ga ontario blended gas blending hydrogen reduction appliance assessment concentration engineering assessment natural ga distribution network markham Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright...

... mitigation effect production chemistry steel mining hydrogen embrittlement mechanism corrosion management steel corrosion inhibition dissociation adsorption kubota binding energy sus430 co mitigation effect calculation steel surface komoda cr site fe site staykov composition reduction...

... scenarios. At the same time, it is well known that hydrogen may have a detrimental effect on the properties of steels, resulting in what is often termed "hydrogen embrittlement" (HE). HE might lead to significantly reduced ductility in steels. In addition to reduction in ductility, it is also likely...

..., demanding a reduction of 70%. The Onboard CCS system for KCS and KVLCC2 was designed to meet the phase 5 from the process simulation. INTRODUCTION Various serious problems caused by global warming are occurring around the world, and eco-friendly decarbonization regulations have recently been conducted...

... shallow water reservoir simulation air lubrication reduction marine transportation europe government kvlcc2 surge force air lubrication system flow rate resistance sway force frictional drag effectiveness upstream oil & gas india government ship hull air injection experiment...

... ABSTRACT More recently, invisible bulbous has been widely used for ship resistance reduction. However, the inner mechanism for its effect remains unclear. Considering this problem, the present study systematically investigates the hydrodynamic performance of two ship models, one with a regular...

... ABSTRACT This paper proposes and validates a multiple ship formation resistance reduction method, designs a suitable fleet formation, and analyzes the objective reasons of formation resistance reduction. In the first part of this paper, a 300DWT oceanographic survey ship is selected...

... ABSTRACT In order to study the variation law of the resistance of the trim drag reduction to the fat and shallow draft type such as inland vessel, this paper takes a 2000t bulk carrier as the research ship. The optimization effect of trim adjustment on this type of ship is verified...

... freight & logistics services resistance optimization problem evolutionary algorithm marine transportation optimization simulation ship hull form kriging model geometry approximation model shipflow total resistance coefficient reduction optimization process starccm artificial...

... a reduction of 5.6% on propeller delivery power. INTRODUCTION Hull form design and optimization is a traditional and important problem that accompanies the development of shipbuilding industry. The complex geometry of hull form, coupling hydrodynamic system and customized design requirements make...

... ABSTRACT Many design variables are often required for the optimization design of the whole hull, thus numerous new sample hulls need to be calculated. The dimensionality reduction of design space is essential for the optimization of whole ship design, which can save the consumption...

... corrosion corrosion rate consequence reduction evaluation mechanism inspection bai & bai failure probability reliability-based methodology integrity management failure mechanism ga pipeline subject ABSTRACT This article proposes a new methodology for evaluating the uniform corrosion...