... france government freight & logistics services amplitude europe government real time system threshold equation month 2022 detection variation coefficient united states government ship container ship sery journal proceedings validation assessment c11-class container ship hysteresis...

... between the dynamic positioning (DP) system and the jacking system. Current DP systems operate without any sensors identifying the hydrodynamic force variations on the legs and spudcans, which vary between different leg and spudcan designs. When the spudcan is near to the sea bottom, the hydrodynamic...

... are important, even at submergence depths of several chord lengths. 21 8 1967 11 7 1968 11 7 1968 14 12 2022 14 12 2022 Copyright 1969, The Society of Naval Architects and Marine Engineers marine transportation configuration variation ship research artificial...

... conditions were set by changing the advance speed (U) and impeller revolution rate (n) for the advance ratio (J) variation. Three U cases were chosen: zero, 50% UD, and 100% UD, where UD is the design advance speed in model scale. The corresponding Froude number (Fr) with 100% UD was .981. The revolution...

...Nicola Petacco; Giuliano Vernengo; Diego Villa; Antonio Coppedé; Paola Gualeni The sensitivity of ship stability performance in waves to geometric variation has been investigated by means of a simulation-based design framework. The study was devoted to assess the influence of hull geometry...

...Shu Xia Bu; Min Gu; Moustafa Abdel-Maksoud Providing a reliable numerical tool for the prediction of parametric roll and pure loss of stability is a difficult task. It is acknowledged that the occurrence of these two failure modes is mainly attributed to the variation of roll restoring arm, which...

.... The Society of Naval Architects and Marine Engineers Artificial Intelligence generating curve hull Upstream Oil & Gas section curve application june 2017 representation optimization problem variation geometry optimization algorithm constraint optimization control point deformation...

..., was the dominant contribution to open water efficiency gains from PBCF rather than a decrease in net torque. Global force and wake fields were also measured in response to design parameter variations of PBCF, i.e., fin chord length, fin span height, pitch angle, and phase lag. In the cases of pitch angle and fin...

... potential flow over the hydrofoil predicting its hydrodynamic characteristics, including the vapor-cavity interface. Shape variations are obtained by an ad hoc parametrization scheme by composite B-spline curves whose control points represent the design variables to the hydrodynamic optimization problem...

... and trims were obtained by the CFD computations for the model to provide data source to analyze the influence of the trim on the resistance. Results indicate that the variation of wave-making resistance due to trim dominates that of the total resistance. Finally, the resistance data for the model were...

.... The Society of Naval Architects and Marine Engineers Catamaran immersion maximum relative bow immersion bow velocity frequency maximum relative bow velocity bow immersion wave encounter frequency encounter frequency two-dimensional filling height variation relative bow velocity september 2015...

... in the results is illustrated with an application where measured wave responses are used to predict the future variation in the responses within the next 5–30 seconds. The main part of the article is devoted to the application of the First Order Reliability Method for derivation of critical wave episodes...

... variation of a naval vessel, powered by a gas turbine as part of an innovative CODLAG system, is simulated and analyzed by means of a detailed and validated numerical code. A sensitivity analysis regarding the influence of the main components deterioration (gas turbine, propellers, and ship hull...

.... However, the ships do not encounter regular waves in the ocean. So, it is necessary to study how important parametric roll is in irregular seas. To study this, it is first important to model the variation of metacentric height in irregular waves, which is nonlinear as a result of the influence...

...; specifically, the drag coefficient in oscillatory flow becomes smaller as reduced velocity increases. 1 3 2014 1 3 2014 2014. The Society of Naval Architects and Marine Engineers Upstream Oil & Gas variation hydrodynamic force Morison equation Engineering oscillatory flow...

.... Validation of the methodology is presented for the benchmark case of accelerated flow past sphere and infinitely long circular cylinder in cross-flow for which analytical solutions of the added mass problem are well known. september 2011 variation vehicle translational Fluid Dynamics Simulation...

... angles a and a' at the top and bottom waterlines, and the rake angle 8. The corresponding bow wave similarly depends on four parameters: the draft-based Froude number F and the three angles a, a', and 8. An extensive parametric study, based on thin-ship theory, is performed to explore the variations...

... generators. Circumferential distortion improvements were assessed using a distortion parameter, harmonics of the velocity variation, and considerations of rotor blade incidence variation. The vortex generators were found to have little effect on local lip pressures and consequently lip cavitation inception...

... that reduced the skin drag by more than 95% over the extent of the cavity, including the cavity closure. drag reduction experiment flux beach gas injection method variation cavitation number cavity closure represent velocity partial cavity Upstream Oil & Gas air flux stable cavity closure...

... are often within a few percent of the measured values of the resistance. 1 6 2010 1 6 2010 2010. The Society of Naval Architects and Marine Engineers Upstream Oil & Gas variation ship research ship model tank rms variation critical value Frequency parameter june 2010...