摘要：Thesubsea 动态起床人底(SDRB ) 是为漂浮的生产站台绳索系统的设备的一重要的片。一结束被连接，带热扩大负担和其它结束的一条僵硬管道，带灵活起床人的动态负担僵硬管道被连接到一个灵活起床人，它的功能因此是在灵活起床人和在海床上修理灵活起床人的僵硬管道之间的一个转变连接。作为一个典型 subsea 产品，在另一方面，设计将为 subsea 产品满足标准的要求。由学习尖的干舷和 subsea 管道的压力 analysisphilosophy，为 SDRB 的尖压力分析的一个物理模型和过程被建立了。负担被考虑了的不利设计的条件，和从僵硬管道和动态负担灵活性的静态的负担的联合也被优化了。并且在为有检查规则的尖应力的 AMSE， DNV 和 API 标准之间的比较分析被做了。因为 SDRB 属于 subsea 管道终端产品， DNV 标准的使用尖应力被推荐检查它的进程。最后，这个过程 SDRB 的尖应力被计算了，并且结果证明夹克衫管子和 SDRB 的搬运人管子压力处理尖当 *** 舱壁不能被在详细分析使用 FEA 软件 ANSYS 的 AutoPIPE 软件精确地模仿，满足 DNV 标准，但是检查结果将仍然满足 DNV 标准的要求。

摘要：耕作 trencher 的潜水艇的犁是主要功能的机制之一，并且它的优化是很重要的。设计参数在决定一个容器的拖引的力量的要求起一个很重要的作用。一个多客观的基因算法在获得犁的最佳的设计的努力基于犁表面的分析模型被检验了并且适用。为一个特定的土壤条件，草稿力量和是在犁的工作过程的关键参数的犁板表面区域被发现犁片穿入角度的相应最佳的价值和犁的主要的切片的二个表面角度优化。象偏差，犁板电梯角度，正切线的尖变化，和跨越的长度的犁板方面角度那样的参数也沿着土壤流动方向关于犁板表面的力量被分析。结果证明优化的犁有改进的犁表演。分别地，主要的切片和犁板的草稿力量是 10.6% 和 7% 不到原来的设计。犁板的 Gaussian 弯曲的标准差被 64.5% 降低，它暗示优化犁板表面的光滑比原版大得多。

摘要：To overco.e the current difficulties of high-precision machining and the high manufacturing and maintenance co.ts of spherical seals for deep-water drilling ball joints,a new spherical seal technique is proposed in this *** spherical seal is mainly co.posed of silico.e rubber and polytetrafluoroethylene(PTFE).Rational structural design makes the seal independent from the ball and other co.ponents,making it easy to replace if leakage occurs at its *** can elastically deform over a certain deformation range,which guarantees that two sealing surfaces fit tightly together.O-Ring and PTFE elasticity makes up for any lack of accuracy during spherical machining and decreases the machining precision requirements for spherical *** a finite element technique and nonlinear theory,the performance of the spherical seal under the influence of various factors is *** results show that the spherical seal designed in this paper exhibits excellent sealing performance under lowtemperature and high-pressure *** spherical seal,a co.bination of an O-ring and PTFE,has the advantages of cheap manufacturing and maintenance co.ts and excellent sealing performance.

摘要：This paper extends a prediction model for multi-directional random wave transformation based on an energy balance equation by Mase with the co.sideration of wave shoaling, refraction, diffraction, reflection and breaking. This numerical model is improved by 1) introducing Wen's frequency spectrum and Mitsuyasu's directional function, which are more suitable to the co.stal area of china; 2) co.sidering energy dissipation caused by bottom friction, which ensures more accurate results for large-scale and shallow water areas; 3) taking into acco.nt a non-linear dispersion relation. Predictions using the extended wave model are carried out to study the feasibility of co.structing the Ai Hua yacht port in Qingdao, china, with a co.parison between two port layouts in design. Wave fields inside the port for different incident wave directions, water levels and return periods are simulated, and then two kinds of parameters are calculated to evaluate the wave co.ditions for the two layouts. Analyses show that Layout I is better than Layout II. Calculation results also show that the harbor will be calm for different wave directions under the design water level. On the co.trary, the wave co.ditions do not wholly meet the requirements of a yacht port for ship berthing under the extreme water level. For safety co.sideration, the elevation of the breakwater might need to be properly increased to prevent wave overtopping under such water level. The extended numerical simulation model may provide an effective approach to co.puting wave heights in a harbor.

摘要：This paper addresses the need for systematic evaluation of the station keeping systems of deepwater drilling *** on the selected drilling semi-submersible co.figuration, the mooring systems were analyzed and designed for a range of water depths using different mooring line *** were steel wire rope, polyester rope and HMPE (high modulus poly ethylene).The mooring analysis was carried out using the advanced fully co.pled time domain analysis method in the co.puter software package *** analysis was first applied to solve the hydrodynamic properties of the vessel and then the motion equations of the co.plete dynamic system including the drilling rig, the mooring lines and risers were developed and solved in the time *** the advanced analysis method, a matrix of mooring systems was developed for operating in water depths of 1000 m, 1500 m, and 2 000 m using various mooring *** development of mooring systems was co.ducted in acco.dance with the co.monly adopted mooring design co.e, API RP 2SK and API RP *** attempts were then made to co.paratively evaluate the mooring system's characteristics and global *** results have been obtained in terms of mooring materials, water depths, and key parameters of mooring *** results provide in-depth insight for the design and operation of deepwater mooring systems in the South china Sea environment.