Investigation on Cutting Stability of Jacket in Decommissioning Process--《China

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Investigation on Cutting Stability of Jacket in Decommissioning Process水利论文+l1^ m l(Od?

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v/c[B gk/p0【摘要】:Jacket cutting operation is one of the most complicated and highest risk operations in the process of decommissioning offshore piled platform, the security and stability of which must be assured. In this paper, the current research on offshore structure removal and jacket cutting is introduced, on the basis of which the types of load along with the load calculation method are determined. The main influences on the stability of a jacket in cutting are analyzed. The experiment test plan is drawn by using orthogonal testing method, and the formula of critical load during the cutting procedure is deduced by differential evolution algorithm. To verify the method and results of this paper, an offshore piled platform to be decommissioned in the South China Sea is taken for an example, and the detailed schedule for jacket cutting is made with the three-dimensional finite element model of the jacket established. The natural frequency, stress, strain and stability of the jacket during cutting process are calculated, which indicates that the results of finite element analysis agree well with that of the deduced formula. The result provides the scientific reference for guaranteeing the safety of jacket in cutting operation.水利论文 LS8b ar X.Tev

af.S u^V0【作者单位】:

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A}Rf?*u@H0Department水利论文k)E,_g-^*w{V

;J3h`F+c5]r7h0【关键词】:

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stability jacket cutting operation piled platforms decommissioning水利论文LcO0f \TF&Z

3n'} @1F#^_n0【基金】:financially supported by the National Basic Research Program of China(973 Program,Grant No.2011CB013702)水利论文$u"yc)X}\G;y,[;q

^)V v"r@p D `X0the National Natural Science Foundation of China(Grant No.51379214)

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the National High Technology Research and Development Program of China(863 Program,Grant No.2008AA092701-3)水利论文1ZkYEZ5n k

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【分类号】:P752

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6ZYyz;|e4P0【正文快照】:水利论文3r c#G)A2?(Mj}OJS

_/@ K+j&j01.IntroductionAs the continuing exploitation of oil resource,more and more offshore facilities are graduallyphased out.Relevant international convention and domestic law stipulates that the offshore platformmust be removed within a year of the oil produc

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