Added Mass Moment of Inertia Induced by Torsional Vibration of Ships

Kumai, Toyoji

doi:10.2534/jjasnaoe1952.1958.104_93

Cited by 3 publications

(2 citation statements)

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“…Среди экспериментальных методов определения ПМИ можно выделить испытания методом элек-трогидродинамической или магнитогидродинамической аналогии на основе аналогии между потоком идеальной жидкости и электрическим или магнитным полем [5,6]; испытания на свободных и вынуж-денных крутильных колебаниях в опытовом бассейне с определением кривых колебаний модели [7,8], на бифилярных подвесах [9], при помощи раскачивающих устройств на модели или на планарных механиз-мах с измерением приложенных усилий к модели с последующей обработкой результатов методом Фурье [10]; испытания на вибрационных установках [11,12]. Обзоры данных методов и устройств, их реали-зующих, приведены в работах [13][14][15].…”

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Identification method for vessel hull hydrodynamic added moment of inertia

Сергеевич¹,

Геннадьевич²

2017

Naučno-teh. vestn. inf. tehnol. meh. opt.

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Научно-технический вестник информационных технологий, механики и оптики, Mechanics and Optics, 2017, vol. 17, no. 4, pp. 744-748 (in Russian). doi: 10.17586/2226-1494-2017 Abstract The paper proposes a new experimental method for identifying of the ship hull added moment of inertia with respect to the yaw angle. A short review of the existing methods, description of the experimental stand, testing procedure, and calculation formula is given. The proposed method is based on the energy approach with special reversive symmetric motions. For implementation of the proposed method, the vessel hull is fixed in the special testing stand where an elastic element is used as the main engine. For the exact symmetry of the programmed rotating motion, the servo drive with a flywheel is installed. Keywords added moment of inertia, energy method, reversive symmetric motions, vessel model hull, inertial servo drive Acknowledgements

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Identification method for vessel hull hydrodynamic added moment of inertia

Сергеевич¹,

Геннадьевич²

2017

Naučno-teh. vestn. inf. tehnol. meh. opt.

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“…The third is a hydroelastic frequency-domain vibration of a submerged or floating structure due to FIS. For the study of the hydroelastic frequency-domain vibration of a structure in contact with fluid, a number of analytical methods have been developed to approximately evaluate the effect of the added mass using equivalent mapping function and model experiment [2][3][4]. Such methods facilitate the calculation of the added mass for the low frequency domain, and are computationally efficient.…”

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Hydroelastic Effects in Vibration of Plate and Ship Hull Structures Contacted with Fluid

Lee¹,

Song²

2011

International Journal of Ocean System Engineering

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The present study deals with the hydroelastic vibration analysis of structures in contact with fluid via coupled fluid-structure interaction (FSI) embedded with a finite element method (FEM) such that a structure displacement formulation is coupled with a fluid pressure-displacement formulation. For the preliminary study and validation of FEM based coupled FSI analysis, hydroelastic vibration characteristics of a rectangular plate in contact with fluid are first compared with the elastic vibration in terms of boundary condition and mode frequency. Numerical results from coupled FSI analysis have been shown to be rational and accurate, compared to energy method based theoretical solutions and experimental results. The effect of free surface on the vibration mode is numerically studied by changing the submerged depth of a rectangular plate. As a practical application, the hull structural vibration of 4,000 twenty-foot equivalent units (TEU) container ship is considered. Hydroelastic results of the ship hull structure are compared with those obtained from the elastic condition.

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Vibration of Ship and Aircraft as a Beam

Mukhopadhyay

2021

Structural Dynamics

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Added Mass Moment of Inertia Induced by Torsional Vibration of Ships

Cited by 3 publications

References 2 publications

Identification method for vessel hull hydrodynamic added moment of inertia

Identification method for vessel hull hydrodynamic added moment of inertia

Hydroelastic Effects in Vibration of Plate and Ship Hull Structures Contacted with Fluid

Vibration of Ship and Aircraft as a Beam

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