An Unstructured Finite Volume Approach for Structural Dynamics in Response to Fluid Motions.
An Unstructured Finite Volume Approach for Structural Dynamics in Response to Fluid Motions.
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DOI：
10.1016/j.compstruc.2007.07.008
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发表时间：
2008-04
影响因子：
4.7
通讯作者：
Guohua Xia;Ching-Long Lin
中科院分区：
文献类型：
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作者：
Guohua Xia;Ching-Long Lin
提出了一种新的胞-涡非结构有限体积法，用于模拟流体运动下的结构动力学。采用一种鲁棒隐式双时间步进方法获得时间精确解。由此产生的代数方程组是无矩阵的，并且允许实体元素包括结构厚度、惯性和结构应力，以准确预测结构响应和应力分布。该方法与流固耦合的流体动力学求解器相结合，为结构动力学计算提供了一种可行的替代方法。网格灵敏度试验表明，有限体积法至少具有二阶精度。通过不同初始条件和材料特性的弹性板涡激振动问题验证了该方法的有效性。结果与已有的数值数据和解析解吻合较好。然后将该方法应用于具有弹性壁面的通道流动的模拟。研究了壁面惯性和结构应力对流体流动的影响。
A new cell-vortex unstructured finite volume method for structural dynamics is assessed for simulations of structural dynamics in response to fluid motions. A robust implicit dual-time stepping method is employed to obtain time accurate solutions. The resulting system of algebraic equations is matrix-free and allows solid elements to include structure thickness, inertia, and structural stresses for accurate predictions of structural responses and stress distributions. The method is coupled with a fluid dynamics solver for fluid–structure interaction, providing a viable alternative to the finite element method for structural dynamics calculations. A mesh sensitivity test indicates that the finite volume method is at least of second-order accuracy. The method is validated by the problem of vortex-induced vibration of an elastic plate with different initial conditions and material properties. The results are in good agreement with existing numerical data and analytical solutions. The method is then applied to simulate a channel flow with an elastic wall. The effects of wall inertia and structural stresses on the fluid flow are investigated.