Frequency Analysis of Submerged Cylindrical Shell near the Rigid Wall with Hydrostatic Pressure

Abstract

Abstract Fluid boundary is quite common to be noted in engineering, for example, water tank, or the ocean. The tank wall could be regarded as rigid wall. Besides, for structures submerged in water, the hydrostatic pressure actually existes, and its effect is important especially for big pressure level. In this work, the rigid wall and hysrostatic pressure are both accounted, and natural frequency is predicted for submerged cylindrical shell near rigid wall with high hydrostatic pressure. Results show that rigid wall effect will reduce modal frequency. And rigid wall effect will be more and more small with increase of distance between shell and rigid wall. It’s finally be ignored while the gap is large enough. Hysrostatic pressure will also reduce modal frequency, and its influence is obvious for high pressure level.