APPARATUS FOR ANALYSING SEMI-SUBMERSIBLE OFFSHORE STRUCTURE AND METHOD FOR ANALYSING STRUCTURE TO COMBINED DESIGN LOAD PARAMETER USING THE SAME

摘要

The present invention relates to an apparatus to analyze a semi-submersible offshore structure, capable of analyzing a structure based on a force applied to the structure as determined by using a design wave value found in a torsion split environment and a longitudinal shear split environment of a structure combined with split generated by the inflow of wave heights; and a structure analysis method for a combined load using the same. According to one embodiment of the present invention, the method of a structure analysis apparatus comprises: a step of extracting torsion, longitudinal shear, and split having the biggest response value among response parameters with respect to a structure based on an analysis result analyzing movement of the structure; a step of selecting an angle of the torsion, the longitudinal shear, and the split having the biggest response value extracted in an extraction step; a step of estimating the second biggest response value between an included angle between the torsion and the split, and an included angle between the longitudinal shear and the split based on the angle selected in a selection step; a step of using and a preset response amplitude operator (RAO) and a design wave value found through the estimated angle having the second biggest response value to calculate the wave height; and a step of using the calculated wave height and the second biggest response value to determine the force applied to the structure due to the load of the torsion split and the longitudinal shear split reflected on the structure.