Adjoint‐based design of shock mitigation devices
Adjoint‐based design of shock mitigation devices
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DOI：
10.1002/fld.2164
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发表时间：
2009-06
影响因子：
1.8
通讯作者：
Arthur Stück;Fernando F. Camelli;R. Löhner
中科院分区：
文献类型：
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作者：
Arthur Stück;Fernando F. Camelli;R. Löhner
非定常欧拉和伴随欧拉解算器已被结合起来，以帮助设计的冲击缓解装置。流场在时间上向前积分并存储。然后，伴随被集成在时间上向后，将保存的欧拉解恢复和插值到当前时间点。在伴随运行期间从表面积分制剂获得的梯度。不同验证案例的伴随梯度和有限差分梯度的比较显示偏差小于10%。所得结果表明，这是一种非常经济有效的方法，可以获得目标函数相对于表面设计变化的梯度。此外，由于灵敏度信息是在整个表面上确定的，因此该过程提供了相当多的洞察力，并且可以有效地促进减震装置的设计，例如建筑上吸引人的防爆墙。版权所有© 2009约翰威利父子有限公司。
Unsteady Euler and adjoint Euler solvers have been combined in order to aid in the design of shock mitigation devices. The flowfield is integrated forward in time and stored. The adjoint is then integrated going backwards in time, restoring and interpolating the saved Euler solution to the current point in time. The gradient is obtained from a surface integral formulation during the adjoint run. Comparisons of adjoint‐based and finite‐differencing gradients for different verification cases show less than 10% deviation. The results obtained indicate that this is a very cost‐effective way to obtain the gradients of an objective function with respect to surface design changes. Moreover, as the sensitivity information is determined over a complete surface, the procedure provides considerable insight, and can efficiently facilitate the design of shock mitigation devices such as architecturally appealing blast walls. Copyright © 2009 John Wiley & Sons, Ltd.