Nonlinear Coupled Responses of a Tethered Spar Platform In Waves
Nonlinear Coupled Responses of a Tethered Spar Platform In Waves
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发表时间：
1997-06
影响因子：
0.8
通讯作者：
Z. Ran;Moo-Hyun Kim
中科院分区：
文献类型：
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作者：
Z. Ran;Moo-Hyun Kim
研究了系留/系泊翼梁平台在规则和不规则波浪中的非线性响应特性。在OTRC三维深水模型盆地进行了1:55比例模型的系列实验，观察该平台在有流风和无风情况下的生存和作业工况下的运动特性。与 Ran 等人研究的大晶石相比，目前使用的晶石模型相对较小。 （1995）。小桅杆由垂直系绳和 6 条展开的系泊线支撑。与该实验程序并行，开发了时域耦合非线性运动分析计算机程序，以解决系泊柔性平台作为集成系统的静态和动态行为。特别是，开发了一种有效的基于全局坐标的动态有限元程序来模拟非线性系绳/系泊响应。通过在附着点施加足够的边界条件，该程序成功地与先前开发的时域船体运动程序相结合。使用该程序，可以获得耦合动态分析结果，并将其与非耦合分析结果进行比较，以了解系绳和系泊线对船体运动的影响，反之亦然。数值结果还与大规模实验进行了比较。
The nonlinear response characteristics of a tethered/moored spar platform in regular and irregular waves are investigated. A series of experiments with a 1:55 scale model was conducted in the OTRC three-dimensional deepwater model basin to observe the motion characteristics of this kind of platform in both survival and operational conditions with and without currents and winds. The spar model presently used is relatively small compared to the large spar studied in Ran et al. (1995). The small spar was supported by a vertical tether and 6 spread mooring lines. In parallel with this experimental program, a time-domain coupled nonlinear motion analysis computer program was developed to solve both the static and dynamic behaviors of a moored compliant platform as an integrated system. In particular, an efficient global-coordinate-based dynamic finite element program was developed to simulate the nonlinear tether/mooring responses. This program was successfully coupled with previously developed time-domain hull motion programs by imposing adequate boundary conditions at the attachment points. Using this program, coupled dynamic analysis results are obtained, and they are compared with uncoupled analysis results to see the effects of tethers and mooring lines on hull motions and vice versa. The numerical results are also compared with the large-scale experiments.