Springing Analysis of a Passenger Ship in Waves

Tilander, Jeremias; Patey, Matthew; Hirdaris, Spyros

doi:10.3390/jmse8070492

Cited by 12 publications

(8 citation statements)

References 16 publications

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“…The system of classification and subsequent registration of sea or river vessels should become more flexible as time goes and due to ongoing objective processes. Of course, all technical characteristics must ensure safety [8,9], first of all, of people and cargo.…”

Section: Discussionmentioning

confidence: 99%

Matters of judicial practice of Sevastopol and the Republic of Crimea in the field of merchant shipping

Vasiliev

2021

SHS Web Conf.

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Merchant shipping is one of the most demanded types of transportation in the modern world. According to some reports, up to 80% of all cargo is transported by sea. In this regard, the issues of legal regulation of this complex and full of implementation nuances activity acquire particular importance. The specific condition of such seaports as Sevastopol and several other ports on the Crimean Peninsula is since Russia is under the influence of negative economic measures (“sanctions”) imposed by a large number of foreign states. Under these conditions, with the same effect of international and Russian legislation in the entire territory of the Russian Federation, the nature of their application in some cases has a certain specificity concerning these territories. In this regard, the analysis of judicial practice in this area was of particular interest. The purpose of this study is to analyze judicial practice from the point of view of the implementation of international and Russian law norms in the field of merchant shipping, as well as to identify certain trends in the activities of the subjects of the relevant legal relations. Analysis, synthesis, the comparative method, and the method of expert assessments are the methods used in the preparation of this work. The following structural analysis of the available material was used: first, the judicial practice was studied, only after that the work with legislation and other sources was carried out. As a result of the performed research, some problematic aspects of the legal regulation of merchant shipping in Russia have been identified. The trends based on which the Russian maritime law can be transformed have also been identified. The novelty of the research lies in the combination of proposals for further improvement and law enforcement practice in the field of merchant shipping.

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Section: Discussionmentioning

confidence: 99%

Matters of judicial practice of Sevastopol and the Republic of Crimea in the field of merchant shipping

Vasiliev

2021

SHS Web Conf.

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“…Improved design methodologies need to take into the account previously acquired practical knowledge about the operation of marine structures and machinery [57], but also need to rely on modern computer-based design and findings from the operational monitoring data and eventual failure analysis. That way, costly and time-consuming experiments can be successfully substituted, the design process can be shortened and safety factors, often too conservative, can be reduced.…”

Section: Discussionmentioning

confidence: 99%

Marine Propulsion System Failures—A Review

Vizentin

Vukelić

Murawski

et al. 2020

JMSE

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Failures of marine propulsion components or systems can lead to serious consequences for a vessel, cargo and the people onboard a ship. These consequences can be financial losses, delay in delivery time or a threat to safety of the people onboard. This is why it is necessary to learn about marine propulsion failures in order to prevent worst-case scenarios. This paper aims to provide a review of experimental, analytical and numerical methods used in the failure analysis of ship propulsion systems. In order to achieve that, the main causes and failure mechanisms are described and summarized. Commonly used experimental, numerical and analytical tools for failure analysis are given. Most indicative case studies of ship failures describe where the origin of failure lies in the ship propulsion failures (i.e., shaft lines, crankshaft, bearings, foundations). In order to learn from such failures, a holistic engineering approach is inevitable. This paper tries to give suggestions to improve existing design procedures with a goal of producing more reliable propulsion systems and taking care of operational conditions.

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“…propeller-, main engines-and thrusters-induced and 3) local machinery-induced vibration. Typically wave-induced vibration analysis includes springing and whipping, see example studies in [7], [8] and [9], for which accurate evaluation of hull girder global natural frequencies is required. Ship propeller, main engines and thrusters are usually main source of such vibration that passengers and crew will notice, and this affects the comfort class of the ship.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the element considers the full stiffness matrix i.e., membrane, membrane-bending coupling, bending and follows first-order shear deformation theory (FSDT). Tilander et al [9] utilized the element for cruise ship springing analysis and in [24] cabin deck natural frequencies were analysed. In lower modes particularly good agreement with 3D fine mesh FE model was obtained, however in the higher modes where plate between the stiffeners deforms locally as part of global vibration modes, see Figure 1, larger error was observed.…”

Section: Introductionmentioning

confidence: 99%

Coarse mesh finite element model for cruise ship global and local vibration analysis

et al. 2021

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This paper presents a practical procedure for creating finite element (FE) model for vibration analysis of cruise ships.The most preferable FE modelling approaches are studied and discussed through case analysis of common ship structure, which covers the range from low to high frequencies. The application of homogenized equivalent single layer (ESL) theory based equivalent element for stiffened panel is extended to local forced vibration analysis, where inertia induced interaction between plate and stiffener occurs. Modal method is used with an energy-based correction for accounting the plate-stiffener interaction into modal properties. Case study results reveal that mesh density of one 4-node element per web frame is suitable for global FE-model when vibration analysis is limited to global hull girder modes. For such modes it is sufficient to only include membrane stiffness of the stiffened panels. For investigating the response of higher frequencies, bending properties of stiffened panel should be included and mesh density should be at least two elements per web frame. Then forced vibration analysis can be performed with excellent accuracy up to frequencies about one third of the local plate natural frequencies between the stiffeners. Beyond that, influence of local plate vibration becomes more significant in panel vibration, making the ESL-theory based element limited. With the applied correction method, the validity of the ESL-model can be extended to approximately two thirds of the local plate natural frequency.

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Springing Analysis of a Passenger Ship in Waves

Cited by 12 publications

References 16 publications

Matters of judicial practice of Sevastopol and the Republic of Crimea in the field of merchant shipping

Matters of judicial practice of Sevastopol and the Republic of Crimea in the field of merchant shipping

Marine Propulsion System Failures—A Review

Coarse mesh finite element model for cruise ship global and local vibration analysis

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