IMECH-IR  > 流固耦合系统力学重点实验室
Non-Linearly Restoring Performance and its Hysteresis behavior of Dynamic Catenary
Li YL; Guo SX(郭双喜); Chen WM(陈伟民); Li M(李敏)
Source PublicationASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering
1905-07-11
PagesOMAE2019-95651
Conference Name38th International Conference on Ocean, Offshore and Arctic Engineering
Conference DateJune 9–14, 2019
Conference PlaceGlasgow, Scotland, UK
AbstractCatenary is increasingly used as mooring-line and riser system as the water depth gets larger due to its lower cost and easier installment. Its dynamic response and restoring performance become more complicated, as the length of the mooring-line become larger, and the structural and fluid dynamics the mooring-line become consequently more obvious. Compared to the quasi-static method where the static restoring force is mainly involved, the dynamic behaviors and its hysteresis of the catenary mooring-line are considered here so as to comprehensively examine the non-linearly restoring performance of mooring-lines. Based on the 3d dynamic vector equations along with the modified FEM simulations, the hysteresis character of the restoring stiffness and the influences of the catenary dynamics on its restoring performance are presented and discussed. It is found that, principally owing to the damping and inertial effect coming from the fluid and structural dynamics, the restoring force of the mooring-line depends on both the structural displacement and velocity. Moreover, the dynamic stiffness behaves as a hysteresis loop, instead of a curve. Our numerical results show that the energy consumption during one period rises nonlinearly with the increase of the body frequency ωd and amplitude A0. And, the influence of nonlinear restoring stiffness on the structural response along with the slack-taut phenomenon caused by structural /hydrodynamic inertia and damping is discussed.
ISBN978-0-7918-5880-6
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80811
Collection流固耦合系统力学重点实验室
Corresponding AuthorChen WM(陈伟民)
Recommended Citation
GB/T 7714
Li YL,Guo SX,Chen WM,et al. Non-Linearly Restoring Performance and its Hysteresis behavior of Dynamic Catenary[C]ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering,1905:OMAE2019-95651.
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