海底光缆万米水深承压性能仿真
Pressure-Bearing Performance Simulation of Submarine Optical Cable under 10000 m Water Depth
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摘要: 为评估海底光缆在万米水深下的承压性能，通过海缆结构建模、材料参数建模，以及网格划分构建海底光缆三维模型。模拟静水压为20，40，60，80，100 MPa时，海底光缆各组件的范式等效应力情况，揭示海底光缆万米水深承压机制和规律。仿真结果表明，海底光缆承压机制是逐渐形成两层承压壳体，第一层由外层细径钢丝和中径钢丝组成；第二层由粗径钢丝组成，将静水压力转移到磷化钢丝，减少对中心不锈钢管的压力传导。100 MPa静水压下海底光缆各组件的最大范式等效应力均不超过其屈服强度的83%，安全系数不小于1.2，该海底光缆能够满足万米水深的使用要求。Abstract: In order to evaluate the pressure-bearing performance of submarine optical cable in
10000 m water depth, a 3D model of submarine optical cable was constructed through submarine cable structure modeling, material parameter modeling, and grid division. Von Mises stress of each component of submarine optical cable was simulated when the hydrostatic pressure was 20,40,60,80,100 MPa, and the pressure bearing mechanism of10000 m water depth of submarine optical cable was analyzed.The simulation result showed that submarine optical cable had two layers of pressure bearing shell. The first layer was composed of outer thin and medium diameter steel wire. The second layer was composed of thick diameter steel wire, and hydrostatic pressure was transferred to the steel wire reducing the pressure conduction to the central stainless steel tube. The maximum Von Mises Stress of each cable component under 100 MPa hydrostatic pressure did not exceed 83% of its yield strength, and safety factors were above 1.2, indicating that the designed cable can used in10000 m water depth.
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