Study on the curvature distribution characteristics of bend sections on dynamic cables
In the process of fatigue life design and analysis of dynamic cables,it is necessary to obtain accurate responses to the location of fatigue hot spots,but the theoretical prediction model and numerical model of dynamic cable curvature are based on a few assumptions.At the same time,the results are not verified.So it is necessary to carry out experimental research on the curvature distribution of the curved section on the dynamic cable.In this paper,a curvature measurement method based on distributed optical fiber measurement technology is proposed,and a finite element model of a dynamic cable-bending system with voids under fatigue load is established.A prototype tensile bending test of a dynamic cable-bending device system was designed,and the dynamic cable curvature distribution was measured by the proposed measurement method.The results show that the maximum curvature at the dynamic cable body is 9.9%larger than that at the bend stiffener,and increasing the tensile value and swing angle will increase the maximum curvature of the dynamic cable and move the maximum curvature forward.The dynamic cable curvature measurement method based on distributed optical fiber measurement technology proposed in this paper provides data support for the prototype test and fatigue design of dynamic cables.
dynamic cablebend stiffenerfatigue hot spotcurvature distributiondistributed fiber
NETL
NSTL
万方数据
