Study on Dynamic Characteristics of Amphibious Aircraft's Water Landing

The safety performance of water landing is an important research for the amphibious air- craft. The interactions between the airplane structure and water belong to complex fluid-structure interaction(FSI) problem. The three-dimensional model of water landing for a certain type of am- phibious aircraft's head has been established. The structural dynamic response of the head's bottom has been analyzed by Coupled Euler-Lagrange(CEL). When the head landing into the water instan- taneously, the pressure of the head's bottom appears peak value; with the secondary collision, the peak value appears again, and then the pressure decays gradually.