Showing papers in "Marine Structures in 1998"

TL;DR: In this article, the authors present analytical, closed-form expressions for the energy released for crushing and the impact impulse during ship collisions, including collision with rigid walls and ship collisions with flexible offshore structures.

TL;DR: In this paper, a non-linear time-domain strip theory for vertical wave loads and ship responses is presented, where the structure is represented as a Timoshenko beam and the hydrodynamic memory effect due to the free surface is approximated by a higher order differential equation.

TL;DR: In this article, the structural performance of an adhesively bonded steel corrugated core sandwich beam element was investigated in bending transverse to the corrugations, under both static and fatigue loading.

TL;DR: In this article, hydrodynamic loads are formulated and equations of motions are derived by taking into account all of the static and dynamic couplings from different parts of the bridge, and the effects of wave parameters such as height, period and direction on the behavior of bridge are investigated.

TL;DR: In this article, the effect of axial preloading on the behavior and instability of a cylindrical member of an offshore structure struck by a supply vessel has been investigated Numerical models have been used to analyse a tubular member with and without axial loading.

TL;DR: In this article, analytical expressions for stress concentration factors due to fabrication tolerances are derived for a number of design cases based on classical shell theory, such as butt welds in tubulars, welds at ring stiffeners and bulkheads in shell structures.

TL;DR: In this paper, a combination of the elastic large deflection theory and the rigid-plastic analysis was adopted to investigate the effect of welding distortions on the ultimate compressive strength of unstiffened plates.

TL;DR: In this article, a full-scale testing system was designed and constructed, in which the stiffened panel was simply supported by cylindrical bearings at both ends and restrained by discrete carriages along the sides.

TL;DR: In this paper, the wave load induced fatigue damage in ship side shells in connections between longitudinals and transverse web frames is calculated based on the Miner-Palmgren fatigue damage formulation and a spectral approach is used to determine the necessary variances of the stress processes.

TL;DR: In this article, the authors present a nonlinear static pushover analysis to determine the ultimate capacity of an offshore jacket platform by assuming the reserve strength characteristics of the jacket beyond the design level and into the nonlinear post yield regime.

TL;DR: In this article, the buckling tests on laminated composite cylinders made from glass fiber reinforced plastic (GFRP) are presented, in which the main variable is the laminate orientation.

TL;DR: In this paper, the authors present the results of a three part investigation of an aluminum floating frame which includes 1. design of a hull panel that satisfies classification rules, 2. completion of finite element analysis and full scale validation on a test panel, and 3. optimization of the panel to obtain a minimum weight design.

TL;DR: In this paper, a parametric series of elasto-plastic large deflection analyses for stiffened panels with flat-bar type of stiffeners under uniaxial compressive loads are carried out varying member proportions and structural parameters.

TL;DR: In this article, a second-level reliability analysis is carried out on a realistic case study, represented by a 150,000 DWT double-hull tanker on service on a North Europe - Persian Gulf route.

TL;DR: In this paper, the influence of ship motion and deformation on the structural design of decks to support production plants in floating production, storage and offloading units (FPSOs) is analyzed.

TL;DR: In this article, the mechanical interaction between steel and one polymeric coating system was studied and the results from the analyses with unaged coating showed failure of the steel before the coating and with aged coating material, coating failure occurred before the steel.

TL;DR: In this paper, a three-dimensional computational fluid dynamics model is used to examine the air flow and forces on a simplified geometrical description of the offshore production platform Troll B. The model is forced by prescribing wind velocity and turbulence level on the inflow open boundary where the vertical wind profile is designed to fit experimental data from wind tunnel tests.

TL;DR: A comparative study of the finite element analysis of the local stresses in a ship structural detail has been carried out by the members of Technical Committee II.1 of ISSC ’97 as mentioned in this paper.

TL;DR: In this article, the authors present a method for estimating the ultimate strength of transverse frames used in ships with a particular aim to incorporate in a theory-based optimum structural design methodology for the overall ship structure.

TL;DR: In this paper, an analytical model was developed to evaluate the movement of a Mobile Offshore Drilling Unit (MODU) in response to the combined load effects of hurricane winds, waves and currents, then a Monte-Carlo simulation process was used to assess the probability of collisions between the MODU and surrounding large facilities.