位于我国渤海湾中南部的Bz25—1油田，储量超过2亿吨，根据油田工程开发方案，将采用设计满载吃水达14.5m的16万吨级FPSO作为主要生产设施。然后由于BZ25-1FPSO就位处水深极浅，极端低水位仅16.7m，所以FPSO在遭遇海域各种恶劣环境条件时的运动响应特性问题就成为直接关系到系统安全和作业效率的重大技术问题。本文首先应用三维势流理论及时域模拟计算方法，对单点系泊FPSO在百年一遇、十年一遇和一年一遇环境条件中的运动响应及船底与海底的间隙进行数值模拟计算。然后将计算结果与模型试验结果进行比较分析。分桁结果显示，满载FPSO在十年一遇和一年一遇环境条件下能够安全作业，在百年一遇环境条件时则有轻微碰底．必须减少载重量，降低吃水。这为将来FPSO的投产作业挺供参考。具有较为重要的现实意义。

浮式生产储油轮（FPSO）是当今海洋石油天然气开发的主流工程设施。就目前国际上最为关注的FPSO水动力问题，包括深水FPSO与系泊、立管系统的耦合水动力预报、甲板上浪、FPSO与穿梭油轮组成的多浮体系统水动力、横摇运动与减摇措施、单点系泊FPSO的运动稳定性等进行了阐述，介绍了我国在浅水FPSO水动力问题上的研究进展，提出加强相关研究的建议。

In this paper, an inner turret moored FPSO which works in the water of 320 m depth, is selected to study the so-called "passively-truncated+numerical-simulation" type of hybrid model testing technique while the tnmcated water depth is 160m and the model scale λ=80. During the investigation, the optimization design of the equivalent-depth truncated system is performed by using the similarity of the static characteristics between the truncated system and the full depth one as the objective function. According to the truncated system, the corresponding physical test model is made. By adopting the coupling time domain simulation method, the tnmcated system model test is numerically reconstructed to carefully verify the computer simulation software and to adjust the corresponding hydrodynamic parameters. Based on the above work, the numerical extrapolation to the full depth system is performed by using the verified computer software and the adjusted hydrodynamic parameters. The full depth system model test is then performed in the basin and the results are compared with those from the numerical extrapolation. At last, the implementation procedure and the key technique of the hybrid model testing of the deep-sea platforms are summarized and printed. Through the above investigations, some bene-ficial conclusions are presented.

Much attention shonld be paid to a large FPSO moored permanently in an oil field with water depth of only about 20 m, since shallow water effects on the hydrodynamics may bring about collision and damage. A 160kDWT FPSO with a permanent soft yoke mooring system is investigated with various shallow water depths and focuses are the low frequency surge motion and mooring load. Computation for the FPSO system is made based on linear 3-D potential fluid theory and time-domain numerical simnlation method. Corresponding model test is carried out in the ocean engineering basin of Shanghai Jiao Tong University. It is shown that, in the surge natural period, low frequency surge motion and mooring force increase remarkably with the decrease of water depth. Especially, the snmller the ratio of water depth and draught is, the quicker the increase is. The shallow water effects shonld be taken into account carefully for determining the design load of a single point mooring system.

As a popular solution for mooring an FPSO (Floating Production, Storage and Off'loading) permanently in shallow water, the soft yoke mooring system has been widely used in ocean oil production activities in the Bohai Bay of China. In order to simulate the interaction mechanism and conduct dynamic analysis of the soft yoke mooring system, a theoretical model with basic dynamic equations is established. A numerical iteration algorithm based on error estimation is developed to solve the equations and calculate the dynamic response of the mooring system due to FPSO motions. Validation is con-ducted by wave basin experimentation. It is shown that the numerical simulation takes only a few iteration times and the final errors are snmll. Furthermore, the calculated results of both the static and dynamic responses agree well with those ones obtained by the model test. It indicates that the efficiency, the precision, the reliability and the validity of the de-veloped numerical algorithm and program are rather good. It is proposed to develop a real-time monitoring system to fur-ther monitor the dynamic performance of the FPSO with a soft yoke mooring system under various real sea environments.