Experimental investigation of steel 45 along some smooth curvilinear strain trajectory

В работе представлены экспериментальные результаты деформирования тонкостенного трубчатого образца по гладкой криволинейной траектории деформирования постоянной кривизны, в которой на каждом участке изменяется знак кривизны и смещается ее центр. Экспериментальное исследование выполнено на автоматизированном расчетноэкспериментальном комплексе СН-ЭВМ в девиаторном пространстве деформаций А.А. Ильюшина (жесткое нагружение) при одновременном комбинированном действии на тонкостенный трубчатый образец растяжения-сжатия и кручения. Исследованы скалярные и векторные свойства материала стать 45. Показано, что экспериментальные диаграммы, характеризующие скалярные и векторные свойства материала носят колебательный характер. The paper presents experimental results of deformation of a thin-walled tubular specimen along a smooth curvilinear strain trajectory of constant curvature, in which the sign of curvature changes at each section and its center shifts. Experimental data were obtained on the automated calculation-experimental complex SN-Computer in the deviator space of deformations A.A. Ilyushin (rigid loading) with a simultaneous combined action on the specimen of tensioncompression and torsion. Scalar and vector material properties of steel 45 are investigated. It is shown that experimental diagrams characterizing scalar and vector properties of the material have oscillatory character.

Application for Estimating Motion Behaviors of FPSO/FSRU and Shuttle Tanker in Alongside and Tandem Mooring Conditions

With increasing attention to global warming, expectations for Floating Production Storage and Offloading (FPSO) System to develop a gas field of which reserve is smaller, or Floating Storage and Regasification Unit (FSRU) as LNG terminal are growing. Offloading transfer of LNG requires rigid loading arm instead of flexible hose because of low temperature of LNG. It involves the relative motion estimation between LNG FPSO/FSRU and a shuttle tanker to design loading arm and to estimate operability of offloading work. The operability in environmental conditions of the sites affects on the decision of the storage capacity and the necessary number of LNG carriers for transportation. For this task of motion study, the motion estimation programs for alongside and tandem alignment have been developed. This paper presents outline of the programs and some validation results. An example of application of the calculation results to design FSRU is also shown.