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| Ditching Simulation and Model Test Technology of Large Transport Aircraft |
| Received:July 02, 2020 Revised:July 19, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.09.027 |
| KeyWord:large transport aircraft ditching suction force model test |
| Author | Institution |
| LYU Jin-feng |
AVIC The First Aircraft Institute, Xi’an , China |
| LIANG Yuan |
AVIC The First Aircraft Institute, Xi’an , China |
| TAN Shen-gang |
AVIC The First Aircraft Institute, Xi’an , China |
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| Abstract: |
| The work aims to improve the methods of ditching simulation and increase the analysis precision. Based on the SPH and finite element methods, ditching simulation of large transport aircraft was carried out. Based on the Von Karman’s classical water-impact theory, the mathematic model of the suction force acting on the rear part of the aircraft was constructed and the response analysis method of ditching based on engineering correction was proposed and verified by experiments Through the analysis, the pitch angle of the aircraft increased to the peak quickly as the nose rose when the aircraft crashed on the water and then the nose moved toward the water surface with the pitch angle decreasing gradually. The change trend of the attitude angle of aircraft between simulation and test was consistent. The analytical error obtained from the ditching simulation can meet the requirements of engineering design. |
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