arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1910.03424math.NAcs.NAmath.OC
收藏

非定常、非线性整体流固耦合的Optimization

Optimization with nonstationary, nonlinear monolithic fluid-structure interaction

Thomas Wick, Winnifried Wollner

摘要:

在这项工作中,我们考虑优化设置的非线性,非平稳的流体-结构相互作用。该问题是制定在一个单一的方式使用任意拉格朗日欧拉框架建立的流体-结构正问题。在优化方法中,无论是最优控制或参数估计问题的处理。在后者中,固体的刚度从给定的参考值估计。在数值解中,采用基于梯度的求解算法求解最优化问题。流固耦合正问题的非线性子问题采用包含线搜索的牛顿法求解。具体来说,我们将正式提供用于梯度计算的时间向后运行伴随状态。我们的算法的发展证明了一些数值例子,例如扩展的著名的流体结构基准设置和拍打膜测试在通道流与弹性壁。

英文摘要:

Within this work, we consider optimization settings for nonlinear, nonstationary fluid-structure interaction. The problem is formulated in a monolithic fashion using the arbitrary Lagrangian-Eulerian framework to set-up the fluid-structure forward problem. In the optimization approach, either optimal control or parameter estimation problems are treated. In the latter, the stiffness of the solid is estimated from given reference values. In the numerical solution, the optimization problem is solved with a gradient-based solution algorithm. The nonlinear subproblems of the FSI forward problem are solved with a Newton method including line search. Specifically, we will formally provide the backward-in-time running adjoint state used for gradient computations. Our algorithmic developments are demonstrated with some numerical examples as for instance extensions of the well-known fluid-structure benchmark settings and a flapping membrane test in a channel flow with elastic walls.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑