Part I of this two-part paper presents benchmark CFD validation force/moment/motion measurements for surface combatant 5415 in planar-motion-mechanism (PMM) maneuvers. The experiments are conducted in the IIHR towing tank as part of an international collaboration for development/application of uncertainty analysis procedures and assessment of scale effects and facility biases. Stationarity and normality tests and statistical convergence errors, single and multiple run methods for obtaining the maneuvering mathematical model hydrodynamic derivatives, and the effects of heave, pitch and roll motions and fixed/free mount conditions are assessed. Assessment of the methods for obtaining the hydrodynamic derivatives is based on reconstructions of the measured force and moment time histories. Part 2 presents phase-averaged stereo PIV flow field measurements. The data is used as a test case at the SIMMAN 2008 and 2014 workshops on verification and validation of ship maneuvering simulation methods. navigational safety and the development of International Maritime Organization Standards forShip Maneuverability (Resolution MSC.137(76), IMO 2002) has significantly increased its importance. Maneuvering simulation methods have been largely system-based approaches using maneuvering mathematical models and experimental data for estimating the hydrodynamics derivatives since surge, sway, yaw and roll are of primary importance and require viscous effects, whereas heave and pitch are of secondary importance and can be predicted using inviscid methods.Recently, CFD methods have shown great promise for replacing experimental data for estimating the hydrodynamics derivatives and for free running simulations at both model and full scale. Significant progress has been made toward this goal by using Reynolds-averaged Navier-unsteady RANS (URANS)-, or Detached Eddy Simulation (DES)-based codes for various hull forms in captive or free-running maneuvers. A few of the latest examples include steady-drift or -turning simulations by Tahara et al. (2002) for Series 60, Simonsen and Stern (2005) for Esso Osaka, Hyman et al. (2006) for Athena R/V, Bhushan et al. (2011) for naval combatant 5415, and Xing et al. (2012) for a tanker hull form. Dynamic captive-maneuvering simulations were done by Cura Hochbaum (2006) for a twin-screw ferry, Di Mascio et al. (2007) for a tanker, Simonsen et al. (2012) for a container ship, and Sakamoto et al. (2012a,b) for a naval combatant. Free-running simulations such as turning circle or zigzag maneuvers have been done by Bhushan et al. (2009) and Carrica et al. (2013) for a naval combatant and Dubbioso et al. (2012) for a twin-screw tanker. Free running CFD simulations with system identification have recently shown promise for the best and most efficient approach for estimating the hydrodynamic derivatives (Araki et al., 2012). Current CFD research focuses on maneuvering in waves (Sadat-Hosseini et al., 2014) and capsize (Hosseini et al., 2011). The 24 th -27 th International Towing Tank Conference (ITTC) Maneuv...

The Marine Strategy Framework Directive has officially stated as soon as 2008 the anthropogenic noise due to shipping were to be mitigated. The policy makers, the yards and the ship owners still strongly rely on the expert studies and guidelines to find the appropriate methodology to assess and then mitigate the acoustic pollution impact shipping on the marine biota. To address this issue, the project AQUO “Achieve QUieter Oceans by shipping noise footprint reduction” (www.aquo.eu) started in October 2012 for 3 years. The AQUO project was built in the scope of FP7 European Research Framework. It involves 13 partners from 8 European countries, mixes academic experts, industry representatives from yard, classification society and other acoustic and bio-acoustic specialized bodies. Addressing the anthropogenic noise pollution into the marine biota is an increasing concern which is logically paired with the increasing commercial maritime traffic. The IMO itself has recently issued a first draft guideline, to be followed up during the next MEPC, addressing this matter. In parallel to the different achievements that are effective or in progress by standardization bodies or other delegated or assigned work group, the AQUO project aims to finally issue guidelines to be taken as methodological tools. The multi-disciplinary team of this project aims to comply with expectations from the different stakeholders. First, an overview of the project is given. The objectives and the related project structure are detailed so as to better understand which axes are chosen and studied. Secondly, it is here proposed to share the recent outcomes of AQUO project. The current status of applied knowledge, related legal decisions as well as standards empowerment are essential to identify the remaining needs and consequent expected efforts. Drawing first the background rationales the noise footprint concept is then detailed. The process followed towards the main objective of mitigating the anthropogenic noise from shipping will be partly revealed and completed by the expected future work to be achieved by 2015.

No abstract

No abstract

No abstract