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首页> 外文会议>International Offshore and Polar Engineering Conference >Reliability and Response Based Design of a Moored FPSO in West Africa Using Multivariate Environmental Contours and Response Surfaces
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Reliability and Response Based Design of a Moored FPSO in West Africa Using Multivariate Environmental Contours and Response Surfaces

机译：基于多元环境轮廓和响应面的西非系泊FPSO的基于可靠性和响应的设计

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The application of Inverse First-Order Reliability Methodology (IFORM) to the determination of response maxima using environmental contours and response surfaces is presented in this paper. In the first part concerned by the environmental data modelling, the directional effects are analysed for the current, wind and wave parameters, and taken into account if necessary. The response modelling is presented in the second part. Current, wind and wave responses are derived using response surface models (RSM). Directional coefficients are obtained from harmonic analysis. Two types of response are considered in this study: the total offset and the total tension in one particular mooring line. The third part is devoted to the application of IFORM approach to the specific case of a moored FPSO in West Africa in ballast condition. Design points and response maxima are computed with a robust iterative gradient method. Directional effects on response maxima are analysed. Results are compared with statistical extreme values from a Direct Simulation Analysis (DSA) in similar loading condition. A reasonably fair agreement is obtained between statistical extreme values from DSA simulations and response maxima from the proposed method combining IFORM approach and RSM technique.
机译：本文介绍了逆一阶可靠性方法（IFORM）在使用环境轮廓和响应面确定响应最大值的应用。在有关环境数据建模的第一部分中，分析了电流，风和波浪参数的方向效应，并在必要时予以考虑。第二部分介绍了响应建模。使用响应面模型（RSM）得出电流，风和波浪响应。方向系数是从谐波分析中获得的。在这项研究中考虑了两种类型的响应：一条特定的系泊缆上的总偏移量和总张力。第三部分致力于将IFORM方法应用于在压载状态下在西非停泊的FPSO的特定情况。设计点和响应最大值通过鲁棒的迭代梯度法计算。分析了对最大反应的方向性影响。将结果与类似负载条件下直接仿真分析（DSA）的统计极值进行比较。 DSA模拟的统计极值与IFORM方法和RSM技术相结合的建议方法的响应最大值之间获得了合理的公平协议。

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