| Citation: | LIU Yong, REN Xinjiang, YAN Fangchao. Structural robust optimization design of beam seal[J]. Journal of Aerospace Power, 2024, 39（10）：20220868 doi: 10.13224/j.cnki.jasp.20220868
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In order to improve the sealing performance of the beam seal, the structural parameters of the beam seal were used as design variables, and the robust optimization design was carried out. A finite element model of the beam seal with elliptical arc groove was established. Taking the maximum contact pressure and contact surface width of these two seals on the sealing contact surface as quantitative indicators of sealing performance, second-order response surface models were established, and the response surface models were solved by multi-objective optimization using genetic algorithm. The additional sensitivity term representing the robustness of the objective function was added to the multi-objective optimization model, and the robust design parameters combination of the beam seal was obtained. The effectiveness of the robust optimization results was verified by the finite element’s numerical simulation. The results showed that when the elliptic semi-major axis was 1.156 mm, the elliptic semi-minor axis was 0.315 mm, and the nominal width of the first seal was 0.429 mm, the sealing robustness of the beam seal was better, and the robust design achieved the expected goal.
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