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arXiv 1807.11232math.OC
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形状Optimization的近似牛顿光顺方法

An Approximate Newton Smoothing Method for Shape Optimization

Jonas Kusch, Stephan Schmidt, Nicolas R. Gauger

摘要:

一种新的方法来有效地近似Hessian的数值形状优化。该方法通过在基于局部傅里叶分析的半自动框架中包括身体拟合坐标和空间变化符号来增强算子符号近似。与经典的算子符号方法相反,所提出的策略将识别非平滑设计在物理上有意义的区域,并将自动关闭这些区域中的平滑。一个新的战略,也数值识别的解析符号的推导,扩展的过程中,各种各样的问题。通过在Stokes和Navier-Stokes流中使用阻力最小化证明了该方法的有效性。

英文摘要:

A novel methodology to efficiently approximate the Hessian for numerical shape optimization is considered. The method enhances operator symbol approximations by including body fitted coordinates and spatially changing symbols in a semi automated framework based on local Fourier analysis. Contrary to classical operator symbol methods, the proposed strategy will identify areas in which a non-smooth design is physically meaningful and will automatically turn off smoothing in these regions. A new strategy to also numerically identify the analytic symbol is derived, extending the procedure to a wide variety of problems. The effectiveness is demonstrated by using drag minimization in Stokes and Navier-Stokes flows.

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。

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