Research On Jack-up And Sliding System Of Offshore Platform

In the process of building offshore platforms and other large steel structures onland, we usually take the method of prefabricating sheet or block componentsseparately before assembling them together. With the continuous development of theoffshore oil industry, the size of offshore platform is often about thousands of squares,weighing thousands of tons and even over ten thousands of tons. Assembling is anessential part in the whole offshore platform construction process, so the research andmanufacturing of related equipment have become more urgent. Assembling offshoreplatform by jacking and sliding is a new method. There is very little domesticexperience in this area currently and the research on jack-up and sliding system ofoffshore platform has very important significance. Considering the workingcharacteristics of jack-up and sliding system, this dissertation finished its mechanicaldesign and analysis of the force-deformation characteristics about main components,and also finished the optimized design of some components. The main contents are asfollows:(1) The analysis of research background, level of development at home andabroad, current problems of jack-up and sliding system.(2) The mechanical design of jack-up and sliding system. Parametric designwas finished in this part and it met the job requirements well. The design was carriedout under the3D environment of SolidWorks.(3) Modeling and finite element analysis. With the development of computeraided engineering (CAE) technology, the finite element technology and relatedsoftware are more widely used. By importing the models of supporting girder andsteel pin combination into finite element analysis software ANSYS Workbench andapplying appropriate boundary conditions, this dissertation simulated theforce-deformation characteristics under different conditions in the process of jacking.(4) Optimization analysis. Size optimization of the supporting component;Obtaining the optimal form of supporting girder by comparing the force-deformationcharacteristics of different forms of supporting girder; Giving revision suggestionsabout fixed supporting cylinder by topology optimization analysis. The optimizationanalysis and design in this part were completed by using ANSYS Workbench.