海缆敷设张力控制影响因素分析OA

This study derived the static equilibrium equation of submarine cables under uniform vertical load,taking into account bending stiffness and large deformation,along with the analytical solution under small-deformation conditions,thereby providing theoretical support for rapid estimation of cable alignment in practical engineering.The effects of the analytical solution,the classical catenary solution,and the numerical solution incorporating bending stiffness under large deformation on cable configuration were analyzed and compared under varying bending stiffness and water depth conditions.Furthermore,the influences of ocean current direction,wave direction,and wave period on the minimum tension and minimum curvature radius at the cable touchdown point were calculated.The results show that under static loading,as the bending stiffness of the submarine cable increases from 3.2 kN·m2 to 320 kN·m2(at a water depth of 50 m),the observed water entry angle during installation decreases.When the water depth increases from 10 m to 50 m(with a bending stiffness of 3.2 kN·m2),the water entry angle increases.Therefore,tension control should be adjusted with corresponding target entry angles depending on bending stiffness and water depth.In addition,the most critical operating condition occurs when the current direction is 180° and the wave period induces ship resonance.Under the most unfavorable sea state conditions(Sea State 4),the touchdown tension of the submarine cable decreases significantly.It is recommended to reduce the cable-laying speed when operating in reverse currents and to avoid construction under wave-resonance conditions.