Modeling fluid-structure interaction by the particle finite element method in OpenSees
Modeling fluid-structure interaction by the particle finite element method in OpenSees
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DOI：
10.1016/j.compstruc.2013.11.002
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发表时间：
2014-02
影响因子：
4.7
通讯作者：
Minjie Zhu;M. Scott
中科院分区：
文献类型：
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作者：
Minjie Zhu;M. Scott
OpenSees有限元软件框架通过粒子有限元法（PFEM）进行扩展，用于模拟流固耦合（FSI）。在框架的高层，新的类处理流体和结构域的网格划分和界面检测，并实现分数阶方法，以解决线性动量和质量守恒的控制方程。在框架的较低层次上，新的有限元和压力约束类将流体贡献组合到全局方程组中。给出了验证和验证的实例，并给出了一个使用几何非线性框架单元和材料非线性纤维截面建模的海岸结构波浪荷载的示范实例。OpenSees对FSI的扩展允许分析人员模拟结构模型上波浪载荷的复杂现象，以及这些模型对连续自然灾害（如地震引起的海啸）的反应。
The OpenSees finite element software framework is extended for simulating fluid–structure interaction (FSI) by the particle finite element method (PFEM). At high levels of the framework, new classes handle meshing and interface detection of the fluid and structure domains and implement the fractional step method in order to solve the governing equations of linear momentum and mass conservation. At lower levels of the framework, new finite element and pressure constraint classes assemble fluid contributions to the global system of equations. Verification and validation examples are presented along with a demonstrative example of wave loading on a coastal structure modeled using geometrically nonlinear frame elements with material nonlinear fiber sections. The extension of OpenSees for FSI allows analysts to simulate the complex phenomena of wave loading on structural models as well as the response of these models to sequential natural hazards such as earthquake induced tsunamis.