A 3D multi-domain high order boundary element method to evaluate time domain motions and added resistance of ship in waves

Chen, Xi; Zhu, Renchuan; Zhou, Wenjun; Zhao, Ji

doi:10.1016/j.oceaneng.2018.03.091

Cited by 26 publications

(3 citation statements)

References 17 publications

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“…e velocity potential can be solved in both the time domain and frequency domain. For a time domain solution, a transient Green function has to be applied in order to take into account the memory effect of the fluid, which includes a convolution integral that has to be evaluated from the current time step back to a certain period of time [30]. A less time-consuming way is to solve the problem in frequency domain and convert the results to time domain by the inverse Fourier transform.…”

Section: Shock and Vibrationmentioning

confidence: 99%

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Hydrodynamic Analysis of Partially Filled Liquid Tanks Subject to 3D Vehicular Manoeuvring

Han

Dai

Wang

et al. 2019

Shock and Vibration

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This paper is concerned with liquid sloshing in a partially filled container due to 3-dimensional vehicle motion. The liquid sloshing is described by a set of linear modal equations derived from the potential flow theory, which can be applied to liquid sloshing induced by arbitrary combination of lateral, longitudinal, and rotational excitations. The sloshing force and moment are expressed with a set of hydrodynamic coefficients that are determined by the linear velocity potential. These coefficients can be precalculated and incorporated into the motion equations of the vehicle system so that a fully coupled vehicle-sloshing model is available. In addition, we propose an approach to calculate the hydrodynamic coefficients using the outputs of commercial frequency-domain boundary element software in order to maximize the efficiency of modelling and computation. The accuracy of the proposed model is examined by comparison with available CFD and model test data in the literature. The case of a road tanker encountering a road bump during acceleration/braking is investigated. Results show that the tank rotational motion will affect the amplitude and the sloshing force, and neglecting tank rotation may lead to underestimation of the sloshing force magnitude.

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Section: Shock and Vibrationmentioning

confidence: 99%

“…From equations (25)- (30), it can be found that the added mass terms are functions of the hydrodynamic parameters λ 1m , λ 2m , and μ m and natural frequency ω m , in the following form [16]:…”

Section: Shock and Vibrationmentioning

confidence: 99%

Hydrodynamic Analysis of Partially Filled Liquid Tanks Subject to 3D Vehicular Manoeuvring

Han

Dai

Wang

et al. 2019

Shock and Vibration

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show abstract

“…Qiang H. and Yao Z. et al [14] established a correlation matrix between interface force and displacement according to the constitutive relationship of the inclusion material. Zhu R. et al proposed a vertical integration method based on the multi-domain higher-order boundary element method [15] and a time-domain calculation method for wave propulsion [16]. Zhu J. et al [17] found that if we want to calculate the regional integral accurately, the boundary element method needs to consider the discreteness of the internal elements of the computational domain and lose the advantage of dimensionality reduction.…”

Section: Introductionmentioning

confidence: 99%

Surface Pressure Calculation Method of Multi-Field Coupling Mechanism under the Action of Flow Field

et al. 2023

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At present, the majority of fluid mechanisms are multi-field coupling mechanisms, and their function is also achieved in the flow field. Therefore, calculating the aerodynamic characteristics of the multi-field coupling mechanism in a symmetric flow field is very important. However, at present, the strong coupling algorithm in the domain has the problems of low accuracy and computational efficiency, which make it more difficult to solve the coupling problem. This article obtains the vector potential of the law of conservation of momentum using the tensor analysis method in a Cartesian coordinate system. Meanwhile, the generalized operator of Navier–Stokes equations and the fundamental solution of the generalized operator are obtained on this basis. Then, this article proposes the boundary integral equation of the Navier–Stokes equations by combining the fundamental solution of the Laplace equation with generalized potential theory. Based on this boundary integral equation, this article has developed a new calculation method that can help achieve integral calculation without domains, greatly reducing the problem’s difficulty. Finally, by comparing the ellipsoid example solution with the experimental results, the algorithm’s reliability in solving the incompressible problem is verified.

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Research on the parametric rolling of the KCS container ship

Zhang,

Liu,

Chen

et al. 2023

J Mar Sci Technol

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A 3D multi-domain high order boundary element method to evaluate time domain motions and added resistance of ship in waves

Cited by 26 publications

References 17 publications

Hydrodynamic Analysis of Partially Filled Liquid Tanks Subject to 3D Vehicular Manoeuvring

Hydrodynamic Analysis of Partially Filled Liquid Tanks Subject to 3D Vehicular Manoeuvring

Surface Pressure Calculation Method of Multi-Field Coupling Mechanism under the Action of Flow Field

Research on the parametric rolling of the KCS container ship

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