Numerical Analysis On Dynamic Responses Of Moored Structures Based On AQWA

Mooring system as an important part of naval architecture and ocean engineering plays a role in locating, related to overall system security. Whether it is floating production storage and offloading(FPSO) which is common in developing of deep-sea resources or CALM mooring system also in order to prevent ships from typhoon moored at the dock,the dynamic response analysis of the mooring system is essentialThis thesis introduced common types of different mooring first, then elaborated the basic theory of the mooring system analysis and followed some calculation of simple example. According to the three-dimensional potential flow theory, meshing the typical ship model by using the commercial finite element software ANSYS, and use AQWA-LINE module of hydrodynamic software AQWA to calculate typically ship's hydrodynamic performance, including additional mass, damping, amplitude response operator(RAOs), wave force, etc. Provides parameters for the following dynamic response analysis of different mooring conditions. At last using AQWA-DRIFT module to calculate two typical mooring system dynamic response analysis:(1) CALM mooring system, the establishment CALM mooring system model to calculate the value of the mooring line tension and six degrees of freedom of the hull dynamic response under different environmental loads, and to compare the advantages and disadvantages of two different ways mooring according to the change of mooring line tension values under different environmental loads.(2) Dock mooring system, the establishment dock mooring system model to calculate the value of the mooring line tension, impact force between the pontoon and six degrees of freedom of the hull dynamic response under different environmental loads. Explored the limit conditions in complex environment coupled loads based on the change of mooring line tension under different wind, wave and flow conditions as calculations of a large number of conditions.