| Explosion protection design is one of the most important designs of explosion risky industrial buildings, and it's also significant for the life safety of staff members. Compared with other explosion precaution, blast wall has some advantages such as low cost, fast installation and high strength, which make it very suitable for the demand of explosion protection of platforms. So in ocean engineering, blast wall is popular on platforms as the representation of explosion precaution, which aims to decrease the damage of explosion to minimum.Blast wall, which is used to isolate work area and living area, bears the main explosive load, so it can efficiently protect the staff members and production facilities on the platform. In China, the research of blast wall started late, however, as the development of ocean oil & gas exploitation, the government has paid more and more attention to the security of oil & gas production. As a result, blast wall has been gradually applied in ocean engineering.When gas explodes, blast wall will bear very big explosive load in a short time which will bring elastoplastic deformation to the blast wall. This point demands much higher dependability of the structure. In this paper, firstly, carry out an in-depth study of explosive load and put forth a non-linear load analysis method which is completely different from linear load analysis and much closer to the reality of actual explosion. Secondly, set up a detailed and reasonable FEM model, and carry out two different analyses, traditional non-linear static analysis and non-linear time-path dynamic analysis. Last, through the compare of results of two different methods, get the conclusion that non-linear time-path dynamic analysis can simulate the action process of explosive load much better than traditional non-linear static analysis, and the result is much closer to reality. Therefore, non-linear time-path dynamic analysis method is suggested to be used in future design of blast wall in this paper.
|
PDF Full Text Request