Numerical Study Of Vibration Of Ship Structure Based On Fluid-structure Coupling

Since the internal combustion engine is widely used in the steel ship with a propeller, theship vibration has been a serious problem. Due to the development of ship with large-scale andhigh-speed, as well as the decrease of the structure mass of ship, the vibration of ship hull hasattracted much attention in recent years. When analyzing the ship vibration, the interaction ofstructure and fluid must be considered. This will involve the knowledge both in fluid mechanicsand structure mechanics and calculation. At present the fluid-structure coupling of ship has beena research focus in naval architectures and ocean engineering design.Based on fluid-structure coupling theory, Computational Fluid Dynamics code FLUENTand finite element analysis of software ANSYS were used to study the vibration of ship structureby loading the reasonable boundary conditions. When analyzing the flow field, the numericalsimulation to the viscous flow around the free surface of a ship hull was carried out. Thereliability of the simulation results was verified and an accurate fluid analysis method forpredicting the ship resistance was provided.The exhaustive analysis of the fluid-structure coupling and the process of numericalsimulation were presented here, and the data transformation between fluid and structure wasstudied. When analyzing the structure field, the additional water mass was calculated by themethod of F M Lewis and fluid-structure coupling respectively. By comparison, the reliability ofsimulation results based on fluid-structure coupling was verified. At the same time, the vibrationof complex container ship hull was simulated by the method of fluid-structure coupling.Application of the method in this paper could solve the vibration of complex ship based onfluid-structure coupling. Therefore, these conclusions could provide important reference to theoptimized design of ship hull.