铜、铝导体海缆力学性能对比分析

Comparative Analysis of Mechanical Properties of Copper and Aluminum Conductor Submarine Cables

本工作基于有限元软件UFLEX以26/35 kV-3×185 mm2海缆为例,详细阐述了铜、铝导体力学性能分析对比过程,并比较了不同电压等级和不同规格海缆的拉伸刚度、扭转刚度、弯曲刚度、破断拉力和最小弯曲半径计算结果。结果表明,铝芯海缆的各项刚度均更大,但破断拉力更小,最小弯曲半径与铜芯海缆近似相等;力学性能方面,铝芯海缆在敷设过程中需要控制拉力的使用范围,防止铝芯单丝的断裂破坏。本工作的研究内容为“以铝代铜”降低海底电缆制造成本提供了一定的科学依据。

Based on the finite element software UFLEX, taking 26/35 kV-3×185 mm~2 submarine cable as an example, the mechanical performance analysis and comparison process were elaborated in detail. The axial stiffness, torsional stiffness, bending stiffness, breaking of cables of different voltage levels and specifications, calculation results of tensile force, minimum bending radius were compared. The results showed that the stiffness of the aluminum core submarine cable was larger, but the breaking force was smaller, and the minimum bending radius was approximately equal to that of the copper core submarine cable. In terms of mechanical properties, aluminum core submarine cables need to control the allowable range of tensile force during the laying process to prevent the fracture and damage of aluminum core monofilaments. The research provided a certain scientific basis for “replacing copper with aluminum” to reduce the manufacturing cost of submarine cables.