ABSTRACT
The dynamic interaction between the deformable structure and fluid is often in engineering practice. The fluid-structure interaction of a partially submerged cantilever beam significantly helps understanding naval architecture issues, e.g. vibrations of rudders and periscope. Therefore, in this paper change of natural frequencies of cantilever beam partially submerged in still water are shown, Figure 1. Natural frequencies of beam are changed under influence of different level of water. One way to simulate cantilever beam submerged in water is virtual mass principle. This principle enables modeling the submerged beam like the simple beam with increased mass. In this case complicated modeling of fluid structure interaction is avoided. The virtual mass is a portion of the surrounding fluid that is accelerated as though it where rigidly attached to the structure.
