Numerical analysis of violent hydroelastic problems based on a mixed MPS-mode superposition method
Numerical analysis of violent hydroelastic problems based on a mixed MPS-mode superposition method
复制标题
基于混合MPS模态叠加法的剧烈水弹性问题数值分析
DOI：
10.1016/j.oceaneng.2019.03.032
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发表时间：
2019
影响因子：
5
通讯作者：
Xing J. T.
中科院分区：
文献类型：
--
作者：
Sun Z.;Zhang G. Y.;Zong Z.;Djidjeli K.;Xing J. T.
传统的基于势流的水弹性计算无法直接模拟剧烈的自由表面变形和撞击，并且缺乏刚体和柔性运动部件之间的相互作用。本文采用改进的MPS（运动粒子半隐式）和模态叠加方法对涉及剧烈自由表面变形和砰击的圆柱壳和非均匀梁结构进行时域水弹性计算。重新审视和扩展了改进的模态叠加技术，推导了柔性壳和非均匀梁运动的时域控制方程，该方程耦合了刚体和柔性模态并考虑了它们之间的相互作用。作者之前开发的改进MPS方法首先通过刚性圆柱壳进水问题进行验证，然后对柔性圆柱壳进水和船体结构砰击进行了模拟。目前的结果与现有的数值和实验数据之间取得了较好的一致性，这表明了所提出的模型对于涉及剧烈自由表面变形的水弹性计算的可行性。
The traditional potential-flow-based hydroelasticity computation is unable to directly simulate the violent free surface deformation and slamming, and has a lack of mutual interactions between rigid-body and flexible motion parts. In this paper, the modified MPS (Moving Particle Semi-implicit) and modal superposition methods are used for the time-domain hydroelasticity computation of cylindrical shell and non-uniform beam structures involving violent free surface deformation and slamming. The improved modal superposition technique is revisited and extended to derive the time-domain governing equations for flexible shell and non-uniform beam motions, which couples rigid-body and flexible modes and considers the mutual interaction between them. The modified MPS method developed by the authors previously is first validated by the rigid cylinder water problem, and then the flexible cylindrical shell water entry and ship hull structure slamming are simulated. Relatively good agreement has been obtained between current results and the available numerical and experimental data, which shows the feasibility of the proposed model for the hydroelasticity computation involving violent free surface deformation.