CAJ | 학술논문

采用Froude相似准则和常规缩尺比在现有试验水池很难对深水系泊缆进行完整模拟.一种可行的方法是对全水深系泊缆进行截断,设计静力和动力特性都与全水深系泊系统等效的水深截断系泊系统.但是如果深水平台的工作水深很大,或者是现有水池的工作水深很浅,就需要对全水深系泊缆进行较大的截断.文章对一工作在15OOm 水深的Cell-Tress Spar平台在现有4m水深的水池进行了模型试验.虽然采用了1:100的模型缩尺比,但是截断因子仍然较大.文中给出了6种水深截断系泊缆方案,主要参数均各不相同.通过单缆模型试验对水深截断系泊缆的动力特性进行了研究,并采用其中2种水深截断系泊缆进行了不规则波模型试验.结果表明,增大直径和单位长度空气中重量可以有效增加水深截断系泊缆的动力响应,合理控制轴向刚度可以保证在整个位移范围内的动力响应变化趋势.因此认为,如果合理地选择了水深截断系泊缆的所有参数,较好模拟全水深系泊缆的动力响应是可能的.
채용Froude상사준칙화상규축척비재현유시험수지흔난대심수계박람진행완정모의.일충가행적방법시대전수심계박람진행절단,설계정력화동력특성도여전수심계박계통등효적수심절단계박계통.단시여과심수평태적공작수심흔대,혹자시현유수지적공작수심흔천,취수요대전수심계박람진행교대적절단.문장대일공작재15OOm 수심적Cell-Tress Spar평태재현유4m수심적수지진행료모형시험.수연채용료1:100적모형축척비,단시절단인자잉연교대.문중급출료6충수심절단계박람방안,주요삼수균각불상동.통과단람모형시험대수심절단계박람적동력특성진행료연구,병채용기중2충수심절단계박람진행료불규칙파모형시험.결과표명,증대직경화단위장도공기중중량가이유효증가수심절단계박람적동력향응,합리공제축향강도가이보증재정개위이범위내적동력향응변화추세.인차인위,여과합리지선택료수심절단계박람적소유삼수,교호모의전수심계박람적동력향응시가능적.
Modeling the deepwater mooring system in present available basin using standard Froude scaling at an acceptable scale presents new challenges. An available method is to truncate the full-depth mooting lines and find an equivalent truncated mooring system that can reproduce both static and dynamic response of the full-depth mooring system, but large truncation factor arises if the wa-ter depth where the deepwater platform operated is very deep or the available water depth of the basin is shallow. A Cell-Truss Spar operated in 1 500m water depth is calibrated in a wave basin with 4m water depth. A large truncation factor arises even though a small model scale 1:100 is chosen. Six different truncated mooring lines are designed and can be distinguished from each other by different structure parameters. Dynamics of these truncated mooring lines are investigated by means of single line model tests, and two of them are applied into irregular wave model tests at the truncated water depth. The results show that dynamic response of truncated mooring line can be enlarged by using larg-er diameter and mass per unit length in air, and the changing tendency at possible range of horizontal motion can be controlled by adjusting axial stiffness, so the response can be reproduced as close as full-depth mooring line if all the parameters are properly chosen.