海缆铠装结构锚固性能有限元分析

Finite element analysis on anchorage performance of submarine cable armor layer structure

基于有限元显式算法,通过预紧、加载载荷作用次序,研究海缆铠装层的锚固结构在工作载荷和破断力下的承载能力,并对影响锚固性能的参数进行敏感性分析.数值仿真结果显示:在破断力作用下,法兰内壁与钢丝接触位置产生明显压痕,钢丝断裂位置发生在钢丝在锚固出口位置.增加锥形锚固的内锥角可降低钢丝轴向拉伸量,减缓法兰的不利应力.同时.在较低摩擦因数下具有较大内锥角的接头盒依旧具有良好的机械性能.所设计的内锥形锚固维修接头盒能满足施工过程中的最大拉伸载荷要求.

Based on the finite element explicit algorithm,the bearing capability of armor layers of submarine cable under both normal working and breaking loads are studied using pre-tightening and loadapplying sequentially, and the sensitivity of the parameters affecting the anchorage performance is analyzed. The numerical simulation results show that the obvious grooves occur on the contact location between flange inner wall and armor wires under the breaking loads and the wires is broken just at the exit position of anchorage. By increasing the inner cone angle of the flanges,the axial pulling stretch of the wires can be reduced,as well as the relaxing of the harmful stress. Meanwhile,with lower friction factor,the repair joint box with larger inner cone angle performs good mechanical properties. The inner cone anchorage repair joint boxes are capable to withstand the maximum pulling loads during the working process.