Research On Dynamic Response Of Small And Medium Floating Bodies Under Regular Wave

As a guarantee platform for marine resources research,the multi-floating structure has become an essential prerequisite for marine exploitation in recent years with the exploration and application of marine resources.The complexity of the marine environment and the coupling between the multiple bodies make the research of the multi-floating body more difficult.How to predict the environmental load accurately and reasonably has become the precondition of the safety design and operation of marine engineering structures.Therefore,it is very important for the development of marine engineering technology to study the motion response of the multi floating body structure and the motion and stress under extreme sea conditions.In this paper,based on the three-dimensional potential flow theory,the motion and force of the single floating body module and the multi-body module in the time domain are simulated by using the ANSYS AQWA software.Based on the two floating bodies with connection relation and connectionless relation,the influence of the influence factors on the motion of the floating body under the action of regular wave is analyzed respectively,and the motion and the force of the articulated double floating body are discussed under the limit sea condition.At last,the influence of various influencing factors on the connection of the floating body was studied with 4 floating bodies as an example.In this paper,the influence of the wave angle on the motion response and the wave force of the single floating body are analyzed in the time domain,and the influence of the motion of the floating body on the hydrodynamic coefficients such as the additional mass and the damping coefficient is analyzed.In the study of two floating-body modules,the relative problems of two floating bodies were discussed under the three-level sea condition,respectively,with no connection and two floating bodies with connection.The influence of floating body spacing,wave angle and float length on the motion response of the floating body was analyzed in two floating bodies with no connection,and the motion response of two floating bodies with no connection under each influence factor was studied.Some suggestions are put forward to realize the connection between two floating bodies.When the two floating bodies are connected,the connecting mode is hinged,and the hinge is a cylindrical hinge withonly y direction,and the water depth,the wave angle,the influence of the hinge stiffness and other factors on the motion response and the wave force.In addition,the wave height and the period of the design are calculated,and the motion response and wave force of the floating body in the design wave are discussed.In this paper,based on the study of two floating body modules,the research object is extended to the multi floating body,and the motion response and wave force of the floating body are studied by using 4 articulated floating bodies as the research objects,such as the number of floats,the wave angle,the depth and the wavelength.The motion response of the floating body and the change law of the wave force of the hinge contact are obtained by comparing the motion response of the multi floating body with the change law of the influencing factors and the variation of the motion response of the two floating bodies.On this basis,it provides a reference for the rational design of the floating-body inter connector.