Abstract
Structural-acoustic optimization procedures can be used to find the optimal design for reduced noise or vibration in many real-world scenarios. However, the time required to compute the structural-acoustic quantity of interest often limits the size of the model. Additionally, structural-acoustic optimization using state-of-the-art evolutionary algorithms may require tens of thousands of system solutions, which add to the limitations for large full-scale systems. To reduce the time required for each function evaluation, parallel processing techniques are used to solve the system in a highly scalable fashion. The approach reduces the analysis time by solving the system using a frequency-domain formulation and distributing solution frequencies amongst processors to solve in parallel. To demonstrate, the sound radiated from a curved panel under the influence of a turbulent boundary layer is minimized in the presence of added point masses, which are varied during the optimization procedure. The total mass is also minimized and the Pareto front relating the trade-off between added mass and reduced noise is determined. Solver scaling information is provided that demonstrates the utility of the parallel processing approach.
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Acknowledgments
The authors would like to thank Dr. Peter Lysak for his recommendations regarding the forcing functions used in this paper.
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Shepherd, M.R., Campbell, R.L. & Hambric, S.A. A parallel computing framework for performing structural-acoustic optimization with stochastic forcing. Struct Multidisc Optim 61, 675–685 (2020). https://doi.org/10.1007/s00158-019-02389-2
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DOI: https://doi.org/10.1007/s00158-019-02389-2