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| 深水陡波形动态电缆关键承力结构截面应力预测模型研究 |
| A cross-sectional stress prediction model of key load-bearing structure of deepwater steep waveform dynamic cables |
| 投稿时间：2025-08-13 修订日期：2025-09-23 |
| DOI： |
| 中文关键词: 陡波形动态电缆 关键承力结构 应力预测 解析模型 截面应力 |
| 英文关键词:steep waveform cable key load-bearing structures stress prediction analytical model cross section |
| 基金项目:国家重大专项项目(2024ZD140330602)；国家自然科学(12432005)；航空科学(2022Z061001) |
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| 中文摘要: |
| 随着深海环境对海洋工程结构要求的不断提高，深水陡波形动态电缆的设计与分析已成为重要研究方向。本文提出了一种适用于深水陡波形动态电缆关键承力结构的应力预测模型。通过分析陡波形电缆服役过程中的运动状态，建立电缆整体线型和截面关键承力结构间的控制方程。将动态电缆的设计参数和浮体运动姿态代入线型控制方程，计算电缆的整体受力分布，并将整根电缆离散为若干微元段，将截面两端轴向受力和弯矩作为边界条件输入应力重构算法，实现截面承力结构的应力计算。通过OrcaFlex和ABAQUS仿真验证，结果表明：在静态荷载下，轴向受力和曲率的最大相对误差分别为约0.72%和4.93%；在动态荷载下，轴向应力和接触应力的最大相对误差分别为约11.8%和11.6%。与现有方法相比，所提出的模型可为深水电缆的设计、优化及水下非粘接管缆的安全性评估提供新的思路和方法。进一步研究可将模型扩展至其他海洋工程结构，为相关领域的安全性与可靠性分析提供理论支持。 |
| 英文摘要: |
| With the increasing demands of deep-sea environments on marine engineering structures, the design and analysis of deepwater steep waveform dynamic cables have become important research areas. This paper proposes a stress prediction model for the key load-bearing structures of deepwater steep waveform dynamic cables. By analyzing the motion states of the cable during its service, a control equation is established for the overall cable configuration and the key load-bearing structural sections. The dynamic cable's design parameters and the motion posture of the floating body are substituted into the configuration control equation to compute the overall force distribution of the cable. Furthermore, the entire cable is discretized into several infinitesimal segments, and the axial force and bending moment at the two ends of the section are used as boundary conditions in the stress reconstruction algorithm to calculate the stress of the load-bearing structures at the cable's cross-section. The model is validated using OrcaFlex and ABAQUS simulation tools, and the results show that under static loading, the maximum relative errors for curvature and axial force are approximately 4.93% and 0.72%, respectively. Under dynamic loading, the maximum relative errors for axial stress and contact stress are approximately 11.8% and 11.6%, respectively. Compared to existing methods, the proposed model offers new ideas and methods for the design and optimization of deepwater cables and the safety evaluation of underwater non-bonded pipelines. Future studies may extend this model to other marine engineering structures, providing theoretical support for safety and reliability analysis in related fields. |
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