Numerical Analysis About High-speed Entry Water Of Rocket Sled Water Brake Machine

In this paper, the numerical analysis of the high-speed water entering of the rocket sled's water brake structure are carried by the Fluid-structure Interaction way of the ANSYS/LS-DYNA, and the load and stress of the rocket sled's water brake structure under the water resistance force are calculated by the software finite element computational procedures ABAQUS.Firstly, the research history development of the water-entry structure is reviewed. Secondly, the basic principle and solving steps of the FEM methods, as well as the calculating method and the relatively theory are introduced. Through the Numerical Simulation of the high-speed water entering of the rocket sled's water brake structure, we get the 3D images of Supercavitation, the water upheaving, splashing water, pressure-wave and the speed-acceleration curve, and the resistance characteristics.By comparing the previous high-speed water entering experiments and the Numerical Simulation of the rocket sled's water brake structure, It is confirmed that our calculation method is believable and corrects. The stress and strain of the rocket sled's water brake structure is obtained through the Structural Static Analysis of ABAQUS. In one word, the results of this research and calculation may provide a technical support for the design of rocket sled water brake structure in some degree, and also are useful for the dynamics analysis of other high-speed water entering structures.