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由于高强聚乙烯(HMPE)和聚酯(polyester)缆绳具有各自独特的材料性能,因此提出在超深水绷紧式系泊系统中,采用高强聚乙烯和聚酯组成的混合缆作为系缆。以一系泊在超深水处的FPSO为例,系缆分别采用聚酯缆绳、高强聚乙烯缆绳以及混合缆。比较了循环载荷作用下,不同绷紧式系泊系统的动力响应。分析表明,在超深水中采用混合缆能够设计出合宜刚度的系泊系统,使系泊系统既有保持海洋浮式结构物在平衡位置的能力,又有风暴载荷下良好的生存能力。较理想的混合缆构型是:在靠近海底部分,采用高强聚乙烯缆绳;而在靠近海面部分,采用聚酯缆绳。这些认识对混合缆应用于超深水绷紧式系泊系统具有重要的参考价值。
Due to their unique material properties, high-strength polyethylene (HMPE) and polyester cables are proposed as hybrid cables in ultra-deep-water taut mooring systems using high-strength polyethylene and polyester hybrid cables. Take an example of an FPSO moored in an ultra-deepwater system. The tethers use polyester cables, high-strength polyethylene cables and hybrid cables respectively. The dynamic responses of different tensioned mooring systems are compared under cyclic loads. The analysis shows that the mooring system with proper rigidity can be designed by using hybrid cable in ultra-deep water, which makes the mooring system not only maintain the ability of marine floating structure to balance position but also have good survivability under storm load. The ideal hybrid cable configuration is: near the sea floor, the use of high-strength polyethylene cable; and in the vicinity of the sea surface, the use of polyester cables. These findings have important reference value for the application of hybrid cables in ultra-deep water taut mooring system.