首页> 外文期刊>International journal of non-linear mechanics >Nonlinear equilibrium of partially liquid-filled tanks: A finite element/level-set method to handle hydrostatic follower forces
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Nonlinear equilibrium of partially liquid-filled tanks: A finite element/level-set method to handle hydrostatic follower forces

机译:部分填充液体的储罐的非线性平衡:处理静压随动力的有限元/水平设定方法

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This paper deals with the nonlinear finite element computation of the prestressed state of structures partially filled with an incompressible inviscid liquid. The fluid is modeled by hydrostatic follower forces such that no volumetric fluid mesh is needed. Large deformations are taken into account and lead to the fluid height variation of the wetted surface to satisfy the fluid volume conservation. The main originality of this work lies on the use of a level-set approach to handle numerical integration on the fluid-structure interface. The method is developed on 3D problems considering a finite element quadratic mesh. Various numerical examples are computed using a Newton-Raphson algorithm and a quadratic convergence rate is reached by using consistent tangent stiffness operators.
机译:本文涉及部分填充了不可压缩粘性液体的结构的预应力状态的非线性有限元计算。流体通过静液压从动力建模,因此不需要体积流体网格。考虑到大的变形并导致润湿表面的流体高度变化以满足流体体积守恒。这项工作的主要创意在于使用水平集方法来处理流固界面上的数值积分。该方法是针对考虑了有限元二次网格的3D问题而开发的。使用Newton-Raphson算法计算了各种数值示例,并使用一致的切线刚度算子达到了二次收敛速度。

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