基于ALE法的海底电缆土壤覆盖物清理技术

基于任意拉格朗日-欧拉(Arbitrary Lagrangian-Eulerian, ALE)方法，对海底电缆在位情况下土壤覆盖物射流清理过程进行探讨，并分析射流速度和海床强度在海底电缆土壤覆盖物清理过程中对海底电缆受力损伤的影响。结果表明：当海床土壤相同时，射流速度越大，海底电缆受力越大，当射流速度为50 m/s时海底电缆将发生破坏；在相同射流速度下，海床土体的剪切模量、内聚力和摩擦角越小，海底电缆受力越大。在海底电缆覆盖物清理过程中需要根据海床强度选择相对应的射流速度，以满足清理要求。研究成果可为海底电缆土壤覆盖物清理技术研究提供参考依据。

Soil Mulch Cleaning Technology of Submarine Cable Based on ALE Method

Based on the Arbitrary Lagrangian-Eulerian (ALE) method, the soil mulch cleaning process under the presence of marine cable is discussed. The effects of jet velocity and seabed strength on the stress damage of the submarine cables during soil mulch cleaning are investigated. The results show that: when the seabed soil is the same, the higher the jet velocity is, the greater the force of the cable is, when the jet velocity is 50 m/s, the submarine cable is damaged; at the same jet velocity, the smaller the shear modulus, cohesion and friction angle of the seabed soil are, the greater the force of the cable is. It is necessary to select the corresponding jet velocity according to the seabed strength to meet the cleaning requirements in the process of cable mulch cleaning. The research results can provide reference for the study of soil mulch cleaning technology of submarine cable.