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The focus of the present paper is the development of a resilience framework suitable to be applied in assessing the safety of ship LNG (Liquefied Natural Gas) bunkering process. Ship propulsion considering LNG as a possible fuel (with dual fuel marine engines installed on board) has favored important discussions about the LNG supply chain and delivery on board to the ship power plant. Within this context, a resilience methodological approach is outlined, including a case study application, to demonstrate its actual effectiveness. With specific reference to the operative steps for LNG bunkering operations in the maritime field, a dynamic model based on Bayesian inference and MCMC simulations can be built, involving the probability of operational perturbations, together with their updates based on the hard (failures) and soft (process variables deviations) evidence emerging during LNG bunkering operations. The approach developed in this work, based on advanced Markov Models and variational fitting algorithms, has proven to be a useful and flexible tool to study, analyze and verify how much the perturbations of systems and subsystems can be absorbed without leading to failure.
Tomaso Vairo; Paola Gualeni; Andrea Reverberi; Bruno Fabiano. Resilience Dynamic Assessment Based on Precursor Events: Application to Ship LNG Bunkering Operations. Sustainability 2021, 13, 6836 .
AMA StyleTomaso Vairo, Paola Gualeni, Andrea Reverberi, Bruno Fabiano. Resilience Dynamic Assessment Based on Precursor Events: Application to Ship LNG Bunkering Operations. Sustainability. 2021; 13 (12):6836.
Chicago/Turabian StyleTomaso Vairo; Paola Gualeni; Andrea Reverberi; Bruno Fabiano. 2021. "Resilience Dynamic Assessment Based on Precursor Events: Application to Ship LNG Bunkering Operations." Sustainability 13, no. 12: 6836.
At the beginning of 2020, after a long and demanding process, the Second Generation Intact Stability criteria (SGISc) have been finalized at the 7th session of the International Maritime Organization (IMO) sub-committee on Ship Design and Construction (SDC). At present, SGISc are not mandatory, nevertheless IMO endorses their application in order to assess their consistency and validity. It is envisaged that SGISc can support the design of safer ships, nevertheless such a rules framework might have an impact also on the ship operational aspects in a seaway. In fact, within the SGISc framework, Operational Measures have also been implemented providing guidance and limitations during navigation. After a comprehensive overview about SGISc vulnerability levels and direct stability assessment, this paper provides a specific insight into the methodological approach for the Operational Measures extensively addressed as a complementary action to ship design.
Nicola Petacco; Paola Gualeni. IMO Second Generation Intact Stability Criteria: General Overview and Focus on Operational Measures. Journal of Marine Science and Engineering 2020, 8, 494 .
AMA StyleNicola Petacco, Paola Gualeni. IMO Second Generation Intact Stability Criteria: General Overview and Focus on Operational Measures. Journal of Marine Science and Engineering. 2020; 8 (7):494.
Chicago/Turabian StyleNicola Petacco; Paola Gualeni. 2020. "IMO Second Generation Intact Stability Criteria: General Overview and Focus on Operational Measures." Journal of Marine Science and Engineering 8, no. 7: 494.
Seakeeping time domain simulations are carried out to capture the likelihood of a surf-riding and/or broaching event, with the aim to gain a further insight into the ship performance in stern quartering seas. The applied numerical tool, named PANSHIP, is a 6-DoFs time domain seakeeping software based on panel method, combined with semi empirical viscous models. The investigated ships are two yacht vessels and a patrol boat. Calculations are also carried out with a tool implementing the IMO second level vulnerability criterion for surf-riding/broaching. Similarities, differences and critical issues of both approaches are discussed, as a first step in the perspective of a comprehensive application of the IMO Second Generation Intact Stability criteria, inclusive of the so-called “Direct Stability Assessment”.
P. Gualeni; D. Paolobello; Nicola Petacco; C. Lena. Seakeeping time domain simulations for surf-riding/broaching: investigations toward a direct stability assessment. Journal of Marine Science and Technology 2020, 25, 1120 -1128.
AMA StyleP. Gualeni, D. Paolobello, Nicola Petacco, C. Lena. Seakeeping time domain simulations for surf-riding/broaching: investigations toward a direct stability assessment. Journal of Marine Science and Technology. 2020; 25 (4):1120-1128.
Chicago/Turabian StyleP. Gualeni; D. Paolobello; Nicola Petacco; C. Lena. 2020. "Seakeeping time domain simulations for surf-riding/broaching: investigations toward a direct stability assessment." Journal of Marine Science and Technology 25, no. 4: 1120-1128.
Cruise ships are among the most complex and demanding products of the shipbuilding industry. The very special “payload” and exclusive operational profile, i.e. passengers looking for leisure and entertainment, imply outstanding performances in terms of safety standards and customer satisfaction. Attention to environment is relevant as well, since these ships are used to operate in spectacular marine ecosystems. The need of European shipyards to continuously progress to preserve the market leadership requires a virtuous evolution of the ship design process projected on a life cycle perspective. In this regard Systems Engineering appears to be a robust and reliable paradigm, able to provide the necessary comprehensive view of the cruise ship system as a whole together with a systematic methodological framework that, among the other advantages, enables the active and constructive participation of all the involved stakeholders in the decision-making process. In particular, Systems Engineering strongly relies on the so-called model-based engineering to share, integrate, combine and improve the level of details relevant to the system under development. In this paper the digital twin model will be discussed as a natural evolution of above-mentioned model-based engineering and its utilization in the shipbuilding field will be described as a very promising application especially in the field of cruise ships.
Vincenzo Arrichiello; Paola Gualeni. Systems engineering and digital twin: a vision for the future of cruise ships design, production and operations. International Journal on Interactive Design and Manufacturing (IJIDeM) 2019, 14, 115 -122.
AMA StyleVincenzo Arrichiello, Paola Gualeni. Systems engineering and digital twin: a vision for the future of cruise ships design, production and operations. International Journal on Interactive Design and Manufacturing (IJIDeM). 2019; 14 (1):115-122.
Chicago/Turabian StyleVincenzo Arrichiello; Paola Gualeni. 2019. "Systems engineering and digital twin: a vision for the future of cruise ships design, production and operations." International Journal on Interactive Design and Manufacturing (IJIDeM) 14, no. 1: 115-122.
Ships are among the most complex systems in the world. The always increasing interest in environmental aspects, the evolution of technologies and the introduction of new rule constraints in the maritime field have compelled the innovation of the ship design approach. At an early design stage, there is the need to compare different design solutions, also in terms of environmental performance, building and operative costs over the whole ship life cycle. In this context, the Life Cycle Performance Assessment (LCPA) tool allows an integrated design approach merging the evaluation of both costs and environmental performances on a comparative basis, among different design solutions. Starting from the first tool release, this work aims to focus on the maintenance of the propulsion system, developing a flexible calculation method for maintenance costs prediction, based on the ship operational profiles and the selected technical solution. After the improvement, the whole LCPA tool has been applied on a research vessel to evaluate, among different propulsion layout solutions, the one with the more advantageous performance in terms of costs during the whole vessel operating life. The identification of the best design solution is strictly dependent on the selection criterion and the point of view of the interested parties using the LCPA tool, e.g., the shipbuilder or the ship-owner.
Paola Gualeni; Giordano Flore; Matteo Maggioncalda; Giorgia Marsano. Life Cycle Performance Assessment Tool Development and Application with a Focus on Maintenance Aspects. Journal of Marine Science and Engineering 2019, 7, 280 .
AMA StylePaola Gualeni, Giordano Flore, Matteo Maggioncalda, Giorgia Marsano. Life Cycle Performance Assessment Tool Development and Application with a Focus on Maintenance Aspects. Journal of Marine Science and Engineering. 2019; 7 (8):280.
Chicago/Turabian StylePaola Gualeni; Giordano Flore; Matteo Maggioncalda; Giorgia Marsano. 2019. "Life Cycle Performance Assessment Tool Development and Application with a Focus on Maintenance Aspects." Journal of Marine Science and Engineering 7, no. 8: 280.
Alessandro Boveri; Giovanni Alberto Di Mare; Diego Rattazzi; Paola Gualeni; Loredana Magistri; Federico Silvestro. Shipboard distributed energy resources: Motivations, challenges and possible solutions in the cruise ship arena. International Shipbuilding Progress 2019, 66, 181 -199.
AMA StyleAlessandro Boveri, Giovanni Alberto Di Mare, Diego Rattazzi, Paola Gualeni, Loredana Magistri, Federico Silvestro. Shipboard distributed energy resources: Motivations, challenges and possible solutions in the cruise ship arena. International Shipbuilding Progress. 2019; 66 (2):181-199.
Chicago/Turabian StyleAlessandro Boveri; Giovanni Alberto Di Mare; Diego Rattazzi; Paola Gualeni; Loredana Magistri; Federico Silvestro. 2019. "Shipboard distributed energy resources: Motivations, challenges and possible solutions in the cruise ship arena." International Shipbuilding Progress 66, no. 2: 181-199.
Paola Gualeni; Matteo Maggioncalda. Life cycle ship performance assessment (LCPA): A blended formulation between costs and environmental aspects for early design stage. International Shipbuilding Progress 2018, 65, 127 -147.
AMA StylePaola Gualeni, Matteo Maggioncalda. Life cycle ship performance assessment (LCPA): A blended formulation between costs and environmental aspects for early design stage. International Shipbuilding Progress. 2018; 65 (2):127-147.
Chicago/Turabian StylePaola Gualeni; Matteo Maggioncalda. 2018. "Life cycle ship performance assessment (LCPA): A blended formulation between costs and environmental aspects for early design stage." International Shipbuilding Progress 65, no. 2: 127-147.
In this chapter, the assessment of both the economic and environmental performance of a vessel over its life cycle is addressed, having as a reference approach the Life Cycle Performance Assessment (LCPA) Tool under development in HOLISHIP project. First, on the basis of a literature review, the concepts of life cycle cost and life cycle assessment are briefly recalled. The ideal target is that these two issues shall be integrated and adapted into the ship design process within a circular economy perspective. Then, a separate reference is made to the end of ship’s life phase, explaining the possible strategies to be adopted and highlighting the limitation in estimating energetic and economic performances of this phase in an early design stage. The issue is nevertheless of increasing interest to this regard, as well. A brief review of Codes and Rules related to End-of-Life assessment procedures is also presented. After this, the selection of Key Performance Indicators (KPIs) adopted for the LCPA tool is discussed. These KPIs have been divided in two separate categories: environmental and economic. A methodology to compare KPIs for different ship configurations is then proposed, with an attempt to perform an integrated assessment of environmental and economic aspects. Finally, the relation between KPIs and vessel characteristics is presented. Depending on the level of detail available, the calculation of KPIs and its accuracy are varying accordingly. Finally, issues of uncertainty of certain parameters (e.g. fuel price, freight rates) and their effect on the KPIs are briefly addressed, and ways to their consideration are outlined. Results of application of the HOLISHIP LCPA will be presented in the planned Volume II of the HOLISHIP project.
Matteo Maggioncalda; Paola Gualeni; Chiara Notaro; Carlo Cau; Markos Bonazountas; Spyridon Stamatis. Life Cycle Performance Assessment (LCPA) Tools. A Holistic Approach to Ship Design 2018, 383 -412.
AMA StyleMatteo Maggioncalda, Paola Gualeni, Chiara Notaro, Carlo Cau, Markos Bonazountas, Spyridon Stamatis. Life Cycle Performance Assessment (LCPA) Tools. A Holistic Approach to Ship Design. 2018; ():383-412.
Chicago/Turabian StyleMatteo Maggioncalda; Paola Gualeni; Chiara Notaro; Carlo Cau; Markos Bonazountas; Spyridon Stamatis. 2018. "Life Cycle Performance Assessment (LCPA) Tools." A Holistic Approach to Ship Design , no. : 383-412.