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首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering 2007(OMAE2007) vol.2; 20070610-15; San Deigo,CA(US) >LONGITUDINAL FORCES AND BENDING MOMENTS OF A FPSO
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LONGITUDINAL FORCES AND BENDING MOMENTS OF A FPSO

机译：FPSO的纵向力和弯矩

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摘要

For the design of FPSOs the vertical bending moment is a key parameter to ensure safe operation. If analyzed at water line level, however, the unknown influence of longitudinal forces may distort the results. Hence, a segmented FPSO model with midship force transducers at two levels is investigated in various deterministic wave sequences to identify the vertical bending moment and its associated neutral axis as well as the superimposing longitudinal forces. It is shown that the neutral axis is far below the water line level, with the consequence, that extreme cyclic loads at deck level would be expected. However, as the associated longitudinal forces - even if significant - generate a counteracting moment, this effect is largely compensated.Both, frequency- and time-domain results are presented. With frequency-domain analysis the profound data for the standard assessment of structures, concerning seakeeping behaviour, operational limitations and fatigue are obtained. In addition, time-domain analysis in real rogue waves gives indispensable data on extremes, I.e. motions and structural forces.
机译：对于FPSO的设计，垂直弯矩是确保安全运行的关键参数。但是，如果在水线水平进行分析，则纵向力的未知影响可能会使结果失真。因此，在各种确定性波序列中研究了具有两个水平中间力传感器的分段FPSO模型，以识别垂直弯矩及其相关的中性轴以及叠加的纵向力。结果表明，中性轴远低于水线高度，因此，在甲板高度会出现极端的周期性载荷。但是，由于相关的纵向力（即使很大）会产生反作用力矩，因此这种效果在很大程度上得到了补偿。同时给出了频域和时域结果。通过频域分析，可以获得有关标准结构评估的深层数据，这些数据涉及航海性能，操作限制和疲劳。另外，真实流浪中的时域分析给出了极端情况下必不可少的数据，即运动和结构力。

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