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Research on the Mechanical Performance of Polyester Rope Based on the Dynamic Stiffness Model
KANG Zhuang, SUI Haibo, HuangJun, AI Shangmao
Ocean Engineering Equipment and Technology
2023, 10 (2):
140-144.
The taut mooring system using polyester rope as
the mooring lines overcomes the heavy weight of the traditional chain mooring
material and provides better mooring performance
for the floating structures, which attracts much attention in the field of
deep-water mooring. The nonlinear mechanical properties of the polyester make
it more difficult to predict the tension response of the material. Therefore,
it is essential to model this nonlinear relationship accurately. In this paper,
based on the absolute nodal coordinate formulation
under the condition of large axial tension and combined with the dynamic
stiffness model of 8-strand braided polyester rope, the tension response of the
polyester line is accurately calculated and analyzed, and the results are
compared with the approximate method. The simulation shows that the axial
tension of the polyester cable obtained by the accurate model is larger than
that of the approximate method. The nonlinear
constitutive relationship of the polyester cable displays the phenomenon
that the larger stretch, the larger sitffness is. Besides, the approximate
method will distort the tension prediction. Therefore, it is necessary to adopt
an accurate dynamic stiffness model in calculating the tension response of
mooring systems using polyester material.
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