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- W2142275772 abstract "A hybrid search procedure is used to compare the optimum and off-design performance of uniform and equi-segmented (checkerboard) liners. The objective function for the checkerboard liner contains multiple local optima and is computationally expensivedue to the need to solve a large system of complex linear equations. The hybrid search procedure employs a genetic algorithm to identify promising regions of the design spaceand then switches to a local searchmethod to further resolvethese regionsto obtain the optimum point. A sparse solver with equation reordering is used to reduce computer memory and wall clock time for each function evaluation and the genetic algorithm is run in parallel on 100 CPUs to obtain additional reduction in wall clock time. The primary conclusion of the study is that an optimized checkerboard liner attenuates substantially more sound than an optimized uniform liner at a single, targeted frequency, and has a broader off-design performance. The checkerboardliner tends to be much more effective than the uniform liner at the higher frequencies." @default.
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- W2142275772 date "2004-05-10" @default.
- W2142275772 modified "2023-10-10" @default.
- W2142275772 title "Computational Study of Optimum and Off-design Performance of Checkerboard Liners" @default.
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- W2142275772 doi "https://doi.org/10.2514/6.2004-3030" @default.
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