The purpose of the present paper is to propose installation curves for submarine cable deployment process for different water depths and tension deployment, emphasizing on the importance of modelling the “out of water” cable segment and the friction force between cable and overboard chute of the installation vessel. A custom-made analysis tool has been further expanded and used for the calculation of the cable hydraulic critical responses. Moreover, the concept of the critical water depth is proposed analytically for first time to define the cases in which the “out of water” cable segment can be ignored without denoting the accuracy of the minimum bending radius calculation. In addition, correction factors are proposed in relation to water depth and bottom tension values in order to eliminate the error of the safety factor calculation. Numerical formulation of the friction has been incorporated in the custom-made analysis tool as a further development. The analysis of various cable deployment cases proves that the inclusion of the “out of water” segment in the analysis is critical in shallow water areas. In contradiction, the modelling of the friction force is critical in deep water areas. However, both parameters are potential causes of important analysis errors.

中文翻译：

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海底电缆部署过程的关键水深和安装曲线

本文的目的是提出用于不同水深和张力部署的海底电缆部署过程的安装曲线，强调建模“出水”电缆段的重要性以及电缆与设施斜槽之间的摩擦力的重要性船只。定制分析工具已得到进一步扩展，并用于计算电缆的液压临界响应。此外，首次以分析方式提出了临界水深的概念，以定义在不表示最小弯曲半径计算精度的情况下可以忽略“出水”电缆段的情况。此外，针对水深和底部张力值提出了修正系数，以消除安全系数计算的误差。摩擦的数值公式已作为定制开发工具并入了进一步的开发。对各种电缆布放情况的分析证明，在浅水区域，分析中包括“出水”部分至关重要。相反，在深水区域，摩擦力的建模至关重要。但是，这两个参数都是导致重要分析错误的潜在原因。