Slamming Impact Accelerations Analysis on Small High Speed Passenger Crafts

Samad, Faisal Ikram Abd; Yusop, Mohd Yuzri Mohd; Shaharuddin, Nik Mohd Ridzuan; Ismail, Nor Azman; Yaakob, Omar

doi:10.21278/brod72104

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The incident of porpoising is repeatedly bouncing up and down at the surface of the water. It can also cause a slamming load 96) . Blount and Codega 97) provided recommendations for preventing porpoising based on the findings of Day and Haag's extensive experimental study 98) , which were later presented by Savitsky 78) .…”

Section: Porpoising Phenomenonmentioning

confidence: 99%

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Muhammad Luqman Hakim,

Purnamasari,

Muryadin

et al. 2023

Evergreen

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Indonesia is an archipelago made up of a large number of islands, many of which are small and isolated. For effective connection of the islands, it is crucial to have efficient and welldesigned marine transportation systems. High-speed marine vehicles (HSMVs) are suitable for this purpose due to their compact size and speed. As the country continues to grow, the demand for HSMVs is increasing. However, to address the issue of climate change, these vehicles must have technological advancements that increase their energy efficiency. One way to achieve this is through trim control, a technique that can reduce the ship's resistance and improve energy efficiency. Studies have shown that if the trim control is properly configured, it can reduce the effects of ship drag and porpoising. However, the speed parameter, hull characteristics, and return moment capacity of the trim control must be properly configured. Because if the design is incorrect, resistance actually rises in comparison to not employing trim control.

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Section: Porpoising Phenomenonmentioning

confidence: 99%

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Muhammad Luqman Hakim,

Purnamasari,

Muryadin

et al. 2023

Evergreen

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“…More recently, Samad et al (2021) investigated the slamming impact on small high-speed passenger crafts. Severe slamming of such vessels may pose a danger to passengers' safety and health [5]. In addition, severe slamming introduces significant hull girder vibration.…”

Section: Introductionmentioning

confidence: 99%

Development of a reliability model for crack growth occurrence for a secondary hull component

Kleivane¹,

Leira²,

Steen³

2023

brod

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Ship hull vibration is a major contributor to fatigue crack growth and main engine excitation is identified as an important vibration source. A general method to solve any vibration problem arising onboard a ship does not exist, which encourages the use of a reliability-based framework for assessing ship vibration and its consequences. A stochastic model of vibration response is developed for the probabilistic formulation of the failure probability of the occurrence of crack propagation of a secondary structural hull component. The secondary structural component considered is a pipe stack support. The pipe stack support connects a cargo pump pipe stack to the wall inside the cargo tank, and the support is welded directly onto this wall. First, a generic cargo hold model is analysed with engine speed and the relative distance between the engine and the structural component under consideration as stochastic variables. Then, submodels are used to investigate the local vibration of the support and the stress response is evaluated for a combination of different engine speeds and relative distances. A surface is fitted to the vibration response and used for probabilistic analysis by Monte Carlo (MC/DSPS) and FORM/SORM reliability methods. The limit state is formulated as the possibility of fatigue crack growth based on a threshold stress intensity factor. This threshold factor depends on the initial crack size and different initial sizes are investigated. The adequacy of the functional representation for the stochastic model, which is fitted to discrete data points, is also assessed. It is seen that a functional representation using a sum of sine terms give an adequate fit for describing the stress response induced by engine speed, while a polynomial representation was adequate for the relative distance variable. The failure probability estimated by Monte Carlo simulations and SORM indicates that the pipe stack support is not critical for the occurrence of fatigue crack growth. A main observation from the analysis is that the reliability-based design of secondary structural components, also looking at the interaction with the global structure, may help to improve the vibration-induced stresses in local hull details by application of proper design measures.

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Development of an improved and versatile 2D+t modelling methodology for planing crafts

et al. 2022

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Slamming Impact Accelerations Analysis on Small High Speed Passenger Crafts

Cited by 4 publications

References 10 publications

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Development of a reliability model for crack growth occurrence for a secondary hull component

Development of an improved and versatile 2D+t modelling methodology for planing crafts

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