Abstract
In this study, a mathematical model of a struck ship based on the dynamic stiffness of the hull was developed; a comparison of the impact of collision in the models of dynamic stiffness and static stiffness, showed that the vibration amplitude in the dynamic stiffness was larger than that in the static stiffness in the stress accumulation stage. A simulation of shafting in colliding ships was performed based on a finite-element model using the ANSYS software, and the numerical simulation values and theoretical values were observed to be similar. To analyze the influence of ship collision on propulsion shafting, a test rig on ship collision based on dynamic stiffness was designed, and the experimental values agreed well with the numerical simulation values. From a practical perspective, this study could generate a map similar to an operating guide.
Highlights
The risk to a ship on a voyage is difficult to predict, and serious damage to the ship would influence the motion of the shaft
Numerical simulation was conducted based on the dynamic stiffness and static stiffness models of ship collisions the amplitude-time curves for node 1 and node 8 were obtained as shown in Figures 6 and 7
The research object in this study is, propulsion shafting in the course of a ship and the model of dynamic stiffness of the hull is used to analyze the influence of ship collision on propulsion shafting
Summary
The risk to a ship on a voyage is difficult to predict, and serious damage to the ship would influence the motion of the shaft. Research of propulsion shafting dynamics in ship collisions is a key link to a comprehensive study on the reliability of a ship with regard to vitality and battle effectiveness. It is an indispensable technology for special types of ships such as unmanned ships, among other [3]. Most researchers have established a simplified model of hull stiffness from the perspective of static loads. This model of hull stiffness is too simple and the calculated results of shafting vibration usually do not meet the actual requirements [5]. In this study, based on a total consideration of the hull stiffness, a coupled model of ship collision is established and the theory of ship collision is applied to study its effect on
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
