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Numerical modelling of forced heaving of mono hull and twin hull in particle method

机译:单壳和双壳强迫升沉的数值模拟

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摘要

In this paper, the particle method for handling oscillation of floating body using variable particle spacing is reported. Heave oscillation of floating mono hull and twin hull on the free surface in a viscous fluid is performed using Improved Meshless Local Petrov-Galerkin method based on Rankine Source function (IMLPG_R). The IMLPG_R method is a particle-based method that will solve the interaction between fluid and floating body using Navier-Stokes equation. The pressure at each time step is estimated from Pressure Poisson equation, in order to incorporate the heaving of the floating bodies, some improvements like free surface identification, gradient calculations has been introduced in the present paper to handle the variable resolutions in modelling. Simulations are performed for different frequency and amplitude of oscillations for mono and twin hull forced motions to show the robustness of the developed model to handle both small and steep oscillations.
机译:本文报道了使用可变粒子间距处理浮体振动的粒子方法。使用基于兰金源函数(IMLPG_R)的改进的无网格局部Petrov-Galerkin方法,在粘性流体中的自由表面上浮动单壳和双壳的升沉振荡。 IMLPG_R方法是一种基于粒子的方法,它将使用Navier-Stokes方程解决流体与浮体之间的相互作用。根据压力泊松方程估算每个时间步长的压力,为了结合浮体的沉陷,本文引入了一些改进,例如自由表面识别,梯度计算,以处理建模中的可变分辨率。对单壳和双壳强迫运动的不同频率和振幅的振幅进行了仿真,以显示所开发模型对处理小振幅和陡峭振幅的鲁棒性。

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  • 来源
    《Ocean Engineering》 |2019年第1期|197-214|共18页
  • 作者

    Rijas A. S.; Sriram V.;

  • 作者单位

    IIT Madras, Dept Ocean Engn, Chennai, Tamil Nadu, India;

    IIT Madras, Dept Ocean Engn, Chennai, Tamil Nadu, India;

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  • 正文语种 eng
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