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首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering 2007(OMAE2007) vol.2; 20070610-15; San Deigo,CA(US) >THE INFLUENCE OF DIFFERENT SCENARIOS OF SUPPLY SHIP COLLISION ON THE DYNAMIC RESPONSE OF A NORTH-SEA JACKET-PILE-SOIL SYSTEM
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THE INFLUENCE OF DIFFERENT SCENARIOS OF SUPPLY SHIP COLLISION ON THE DYNAMIC RESPONSE OF A NORTH-SEA JACKET-PILE-SOIL SYSTEM

机译：供船碰撞的不同情景对北海夹克-桩-土系统动力响应的影响

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In the present study, the influence of various scenarios of supply ship collisions, namely, bow, stern and also broad-side impacts on a jacket-pile-soil system is investigated. In the previous study of ship impact on an 8-leg North-Sea Jacket Platform by Amdahl et al.[2] and also other authors, the effect of jacket-pile-soil interaction was not considered. The collision points on the jacket structure are also taken as joints and mid-span of leg, horizontal and vertical braces, namely, hard and soft impact points. The speed and the weight of the colliding vessel are also varied for typical supply vessels. Several supply ship collision analyses are carried out for bow, stern and broad-side impact scenarios on an 8-leg North-sea Jacket platform It is observed that by taking into account the jacket-pile-soil interaction effects, in particular in softer clay soils the amplitude of displacement response after supply ship impact at the deck level is increased due to yield in the upper soil layers. Contrary to this finding, less linear dynamic effects can be seen in the studied jacket-pile-soil system subjected to the supply ship impact. It can also be concluded that for soft impact scenario, the dynamic effects in the global response of the platform located in the mainly OC clayey soil may be much less than those for hard impact scenario on the same platform. For instance, for a brace impact at its mid-span, a less significant dynamic effect has been observed than for a leg impact. The duration of impact in such cases is shown to play an important role in determining the dynamic influence of the platform response. The relative energy absorption of the platform is shown to be more for broad-side loading. It is shown that the global response of the jacket platform during the collision with a supply vessel might depend largely on the scenario of the impact and to some extent on the pile-soil behavior. It is foundthat for the bow and stern impact scenarios, the energy contribution of the local member dent or buckling might be more significant than for the broad-side loading for which the global frame energy contribution and the overall inertia effect of the platform might be a dominant factor.
机译：在本研究中，研究了补给船相撞的各种情况的影响，即船首，船尾以及舷侧对夹层-桩-土壤系统的影响。在先前的研究中，Amdahl等人[8]研究了舰船对8腿北海夹克平台的影响。其他作者也没有考虑外套-桩-土相互作用的影响。外套结构上的碰撞点也可以当作腿，水平和垂直支撑的接缝和中跨，即硬和软碰撞点。对于典型的补给船，碰撞船的速度和重量也有所不同。在8腿北海夹克平台上进行了几次补给船碰撞分析，分析了船首，船尾和侧面碰撞的情况。观察到，考虑到夹克-桩-土相互作用的影响，特别是在较软的粘土中由于上层土层的屈服，补给船在甲板上的撞击后位移响应的幅度增加。与该发现相反，在受补给船冲击的被研究的夹克-桩-土壤系统中，线性动力效应较小。还可以得出结论，对于软影响情景，位于主要是OC黏土的平台的整体响应的动态影响可能远小于同一平台的硬影响情景的动态影响。例如，对于中跨支撑冲击，观察到的动态效果比腿部冲击要小。在这种情况下，影响的持续时间在确定平台响应的动态影响方面起着重要作用。平台的相对能量吸收对于宽侧载荷显示出更多。结果表明，在与供应船相撞期间，外套平台的整体响应可能在很大程度上取决于撞击的场景，并在某种程度上取决于桩土的行为。结果发现，对于船首和船尾碰撞情形，局部成员凹痕或屈曲的能量贡献可能比宽边载荷更为显着，对于宽边载荷而言，整体框架能量贡献和平台的整体惯性效应可能是主导因素。

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