Fluid-Solid Interaction Dynamic Analysis On Water Impact Of The There-Dimensional Structures

The dynamic response of the water impact of the structures is one of complicated problems with wild useful prospect in the fluid-solid interaction field. In the water impact process, not only the structure would be deformed, but also a large magnitude sloshing will be produced on the free surface of the water. Because the fluid-solid interface could not be ensure in advance, the problem are more difficult.. At present there are many topics on water impact needed to be investigated.. There are two kinds of main forms in the water impact process, one is that solid structure impacts on the free surface of water with a certain speed, second one is that the flowing fluid or wave strikes on the fixing structure (i.e. slamming). In fact the second phenomenon can be described into the first one according to certain way. This paper is mainly about the slamming object that solid strike into the freedom surface water, and in this process we applies a software PATRAN and DYTRAN produced by MSC to calculate the stress ,the deformation and the displacement of the slamming object, and the course of liquid surface changing over time. Its difficult point comes from three respects: The not often fixing of this course; fluctuate greatly the liquid and firm nonlinearity which contacts the interface flows. In this text, the slamming object will be adopted the quadrangle board shell unit to divide the net in calculating simulation, field flows to adopt the hexahedron unit to divide the net , compare for the better data with the experiment. This text head-on collide water course is it collide various kinds of factors make comprehensive analysis to influence , and simulation verifies the exactness of the method among them, it has got it with more unanimous conclusion of the experimental data, it have proved the exactness of the simulation method , and has studied round cylinder and nocking into water course of the sphere under the same method , and it draw certain meaningful conclusion, also it point out the existing problem and further research direction at the same time .