The Research On Software For Analysis Of Floating Ocean Energy Platform’s Coupled Motion

With the scope extension of ocean renewable energy utilization, floating ocean renewable energy platform will be taken into application more widely. Ocean energy platforms are quite different from traditional offshore platforms because the loads on them are quite different. The development of a software on analysis of floating ocean renewable energy platform coupled motion has important significance.This paper reviews the research about floating ocean renewable energy platform by Institute of Ocean Renewable Energy System in Harbin Engineering University and summarizes the research method and experience on floating ocean renewable energy platform coupled motion. On the basis of this, this paper put forward the research and design of the software of floating ocean renewable energy platform coupled motion.In the analysis of the platform motion, aiming at simple floating ocean renewable energy platform motion and loads analysis, the frequency hydrodynamic coefficients and wave loads was studied based on the potential flow theory. The paper deduced the fundamental equation and develops the programs for the calculation of the floating ocean renewable energy platform added mass and damping coefficients. The calculation results have been compared with the literature. Based on the basic principle of the indirect time-domain method, the time-domain hydrodynamic coefficients of the floating ocean renewable energy platform is converted from frequency domain. And then the time domain equations of motion are solved numerically. The motion of the simple model is studied based on the program of the hydrodynamic coefficient conversion and the time domain program. The results are compared with the calculation results of AQWA software.For the floating ocean renewable energy platform mooring systems analysis, static analysis of the catenary equation and dynamic analysis have been derived. Static calculation program and dynamic program have been tested on the actual model, and the data has been compared with the data in the literature.In the analysis and calculation of the coupled motion of floating ocean renewable energy platform, the program is used to analyze the coupling motion of floating ocean renewable energy platform with different parameters.The core of this paper is the design of coupled motion analysis software. The methods and tools of software design are described. The outline design and detailed design of the software are carried out. The numerical calculation module of the software uses the C++programming language, using the Eigen and Boost program library. The graphical user interface of the software uses C# programming language and WPF generation, which has the function of 3D graphics display,and has the function of real-time updating of the computing data. The calculation and analysis of software graphical user interface module are in different process, using socket programming for interprocess communication. Finally, the software functions are tested according to different cases.This paper also summarizes the shortcomings of each module of the existing software,and puts forward suggestions for the functional expansion and performance optimization of each module, and gives directions for the further development of the software.