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1.
A numerical procedure is described for predicting the motion and structural responses of tension leg platforms (TLPs) in waves. The developed numerical approach, in a TLP is assumed to be flexible instead of rigid, is based on a combination of the three dimensional source distribution method and the finite-element method. The hydrodynamic interactions among TLP members, such as columns and pontoons, are included in the motion and structural response analysis. Numerical results are compared with the experimental and numerical ones. The results of comparison confirmed the validity of the proposed approach. 相似文献
2.
中等水深轻张型张力腿平台型式研究 总被引:1,自引:0,他引:1
根据我国海上边际油田的分布特点,100m-300m左右中等水深范围是一个很有开发潜力的海域。运用常规技术已很难在这一海域取得更大的经济效益。而更经济有效地开发这些边际油田对我国来说具有重大意义。本文对适合我国中等水深海域国际油田开发的轻型张力腿平台型式进行了探索,提出了三种轻型张力腿平台,对其运动性能及系索张力进行了比较,以期找适合我国中深水海域边际油田开发的张力腿平台型式。 相似文献
3.
Giovanni Spagnoli Cristina de Hollanda Cavalcanti Tsuha 《Marine Georesources & Geotechnology》2020,38(9):1013-1036
AbstractHelical piles are used mainly to resist tension forces generated by uplift and overturning moments of various structures, therefore they have been suggested as a potential alternative to driven piles as offshore pile because they provide a large uplift capacity due to the anchor effect of the helix. To date no standards are available for the assessment of the use of helical piles in the offshore environment. State-of-the art installation and uplift capacity assessment is based on field onshore tests on small helical piles. The purpose of this review is to critically evaluate the current knowledge on helical piles considering uplift capacity, cyclic load, installation torque models and the parameters affecting the installation torque, to understand whether they can be considered for potential offshore applications. The paper could be of valuable interest for engineers and contractors involved in the offshore installation of piles. 相似文献