Achieving a reliable and accurate numerical prediction of the self-propulsion performance of a ship is still an open problem that poses some relevant issues. Several CFD methods, ranging from boundary element methods (BEM) to higher-fidelity viscous Reynolds averaged Navier–Stokes (RANS) based solvers, can be used to accurately analyze the...
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2019 (v1)PublicationUploaded on: April 14, 2023
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2021 (v1)Publication
Merchant vessels experience regular structural assessments. Traditionally, surveys are performed physically by surveyors being expansive and time-consuming. Imagery based, cracks recognition is a topic obtaining considerable interest in commercial and scientific sectors. By using computer vision algorithms, authors propose a new approach to...
Uploaded on: April 14, 2023 -
2022 (v1)Publication
In the last years, an increasing attention has been devoted to ships Underwater Radiated Noise (URN), with the progressive introduction of Guidelines by international organizations such as IMO, Classification Societies voluntary notations, limits and incentives in specific areas. In this context, a large effort has been spent in the study of...
Uploaded on: June 7, 2023 -
2022 (v1)Publication
The impact of underwater radiated noise (URN) by ship traffic has gained an increasing interest among scientists, ship designers and builders. It is now recognized that the underwater noise generated by human activities and in particular shipping noise can be harmful for the marine fauna and therefore urgent actions must be taken to tackle the...
Uploaded on: July 5, 2023 -
2019 (v1)Publication
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Uploaded on: April 14, 2023 -
2021 (v1)Publication
The acoustic comfort in passenger cabins on board six passenger ships is analyzed in this paper. The overall noise inside cabins is first evaluated, then the effect of HVAC (Heating, Ventilation and Air Conditioning) is investigated and several criteria, typical from the civil field (Noise Criterion, Room Criterion, etc.), are applied and...
Uploaded on: April 14, 2023 -
2022 (v1)Publication
The time-dependent spectral characteristics of underwater sound radiated by an oceanic vessel have complex dependencies on ship machinery, propeller dynamics, and the hydrodynamics of the ship exhaust and motion, as well as onboard activities. Here, the underwater sound radiated by a ship equipped with a controllable pitch propeller (CPP) is...
Uploaded on: March 27, 2023 -
2021 (v1)Publication
Ships condition is assessed regularly to maintain safety. Traditionally, structural integrity assessment is performed by surveyors, requiring complex and time-consuming operations to accessany ship space. Imagery based, three-dimensional (3D) reconstruction of structures is a new area obtaining considerable interest. It can provide low-cost,...
Uploaded on: April 14, 2023 -
2022 (v1)Publication
The worldwide increase in ship traffic poses a series of challenges for the designer, the crew and the authorities involved in ship traffic management. Depending on the ship type, both onboard comfort and safety represent two key aspects to be taken into account during the ship life. In the present paper, the focus is on the assessment of the...
Uploaded on: March 27, 2023 -
2021 (v1)Publication
The intense maritime traffic of modern days requires that a considerable attention be paid toward the comfort of ships not only as design criteria, but also as a means of assessing the quality of navigation in service conditions. Certain passenger routes and ship dimensions are more vulnerable than others to rough weather and the current...
Uploaded on: April 14, 2023 -
2017 (v1)Publication
The paper presents the calibration of a numerical collapse model of unidirectional fiberglass epoxy panels with an initially embedded delamination. The panels were tested under axial compression, able to induce buckling collapse. The penalty stiffness, the strength and the fracture toughness are the key parameters governing the...
Uploaded on: April 14, 2023 -
2023 (v1)Publication
Scaled models are implemented to study the radiated noise from the ships' propellers. Typically, acoustic measurements are performed inside a cavitation tunnel using those scaled models of the propeller. This work aims to present a modal acoustic characterization of the cavitation tunnel of the DITEN department of the University of Genoa in the...
Uploaded on: November 25, 2023 -
2020 (v1)Publication
In recent years robotics has become an important resource in engineering. Adoption of Robotics and Autonomous Systems (RAS) in activities related to ship inspections has obvious potential advantages, but also arises particular challenges, both from technical and legal viewpoints. The ROBINS project (ROBotics technology for INspection of Ships)...
Uploaded on: April 14, 2023 -
2020 (v1)Publication
Ship surveys are hazardous and expensive tasks as long as they are carried out by human surveyors to a large extent. The adoption of robotic means can enhance safety by replacing some human operations, filling the gap between the current approach and available robotic technologies, even from a regulatory point of view.The ROBINS project...
Uploaded on: April 14, 2023 -
2019 (v1)Publication
Si descrive lo sviluppo della testing facility costruita presso i laboratori dell'università di Genova nell'ambito del progetto europeo H2020 Robotic Technologies for the Inspection of Ships (ROBINS)
Uploaded on: April 14, 2023 -
2020 (v1)Publication
Inspection is a key aspect of any structural maintenance programme, including that of ship and offshore structures with a long-lasting history of service failures. Ship surveys for construction, verification, repair and conversion are intrinsically hazardous that are mainly performed by human surveyors. The ROBINS project (ROBotics technology...
Uploaded on: April 14, 2023 -
2023 (v1)Publication
Understanding the specific characteristics of onboard noise can significantly benefit human activity in different kinds of ships. Here, the perceived noise can significantly change from space to space in terms of both levels and frequency content, depending on location onboard in respect to the primary sources and on propagation paths....
Uploaded on: January 31, 2024 -
2024 (v1)Publication
The noise radiated by ship propellers can be studied by analyzing scaled models in a cavitation tunnel. However, transferring the measurements made in the enclosed space of the tunnel to the expected values in a full-scale propeller (in a free field) presents a challenge for noise measurements. An acoustic characterization of the DITEN...
Uploaded on: July 3, 2024 -
2021 (v1)Publication
Harbour noise is an issue that in these last years is subject of a research effort financed by the European Union by means of several Programmes, such as FP7, ENPI CBC Med, LIFE and the Interreg Maritime. Within the framework of this last one, six different projects were financed, forming a cluster regarding port noise nuisance. The deep...
Uploaded on: February 22, 2023 -
2019 (v1)Publication
In the North Tyrrhenian sea, port noise affects the development of harbour cities on both French and Italian coasts. Tourism, goods transportation and passenger traffic are increasingly limited by noise impact on port cities, which annoys residents and disturbs the sleep of the exposed population. Therefore, the EU has promoted a...
Uploaded on: May 13, 2023