An experimental study on water impact of large amphibious aircrafts

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (12) : 39-43.

SUN Feng1, 2, WEI Fei1, 2,WU Bin1, 2, ZHANG Jiaxu1, 2 ,CHU Lintang1, 3

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Abstract

The traditional seaplane water load test basically adopts the rigid ratio model, which does not take into account the influence of elastic deformation and scale ratio on load.A large amphibious aircraft cabin section was used to carry out a water load test and a test plan was designed for large test pieces.Different weight states and water-entry speeds were tested.Changes of acceleration peaks, the history and distribution of pressure characteristics were analyzed.The theoretical and experimental values of accelerations at different half widths of wetting were compared.The results show that the secondary peak phenomenon appears in the partial pressure curve; the acceleration peak increases nonlinearly with the weight and the water-entry velocity; as the weight increases, the half width of wetting corresponding to the acceleration peak increases, and the velocity influences it mildly; The Von-Karman theory is closer to the experimental result than the Wagner theory; the smaller the water-entry velocity, the greater the influence of gravity on the water entry of the structure.

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amphibious aircraft / cabin / water impact / Experimental / loading

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SUN Feng1, 2, WEI Fei1, 2,WU Bin1, 2, ZHANG Jiaxu1, 2,CHU Lintang1, 3. An experimental study on water impact of large amphibious aircrafts[J]. Journal of Vibration and Shock, 2019, 38(12): 39-43

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