System Reliability Analysis Of Ocean Jacket Platforms

With the development of social economy, people have expanded unceasingly to the energy.Gradually, the sea petroleum becomes the new growth point of energy. The ocean platform is one of the most effective tool for exploitating energy,how to make it safty in structure and reasonable in economy is a matter of seriously concerned in desige,using, examination and maintenance. It's a great advance to design and evaluate engineering based on the reliability theory. At present, the component reliability theories has already developed maturity,and also applied to actual project. However, it's obviously unscientific to estimate a complex structure system useing component reliability theories merely,the ansys of system reliability is becoming a hotspot in recent years. The system reliability theory is an jumped-up science,developed around the 1980s, whose theory mainly based on probability theory,random process theory,decision theory,gambling theory,combinatorics and mathematical statistics, and take the finite element method,boundary element method and network analysis technology as the computation methods. For about 20 years,lots of boffins have do their best in the field,the system reliability theory has made a prominently progress,and produced many theories and methods one after another. Searching the structure system failure modes and computing system failure probability is the difficult problems of reliability index research,they are limiting factors for the system reliability theories to be used. This treatise has studied and made a summary of theory achievement on system reliablility,taking the jacket platform as the research object,Firstly to examine the component reliability with First-Order Second-Moment method in different load cases and to find out the most weakness part,then to evaluate the reliability of the standard jacket platform and the light jacket platform, using β -Unzipping and Branch-and-Bound Method . By analysis and contrast with each other,to prove it's effective and precise.Consequently to find out their merit and shortage, and provide the reference for applying the system reliability theory in the field of shallow ocean jacket platforms.