Mechanical analysis of 500 kV oil-filled submarine power cable in anchor and blade damage based on Finite element method

Anchor and blade damage are the main factors threatening the safety of submarine power cable operation. In order to analyze the mechanical characteristics of oil-filled submarine power cable after failure., the finite element models of anchor and blade damage of 500kV self-contained oil-filled submarine power cable were established in this paper. The explicit dynamic analysis method is used to simulate the working condition of anchor and blade acting directly on the cable body. The stress and strain distributions of armor layer., insulating layer and conductor layer were mainly analyzed. The result show that the cable armor does not yield but loosen after the anchor damage, the blade damage leads to the armor fracture. Both the insulation layer and the copper conductor yield after anchor and blade damage,and the blade damage is more serious than that of anchor damage. This study can provide data reference for daily operation and fault assessment of oil-filled submarine power cable.