冰激自升式钻井平台的动力响应分析

Dynamic response analysis of jack-up drilling platforms induced by ice vibrations

由于冰荷载研究的限制,冰区自升式钻井平台尚未形成基于动冰力响应分析的结构设计。为了合理地开展自升式平台结构的抗冰概念设计与安全评价研究,冰荷载下自升式钻井平台的动力响应分析是十分必要的。该文首先分析该类柔性结构在动冰荷载下的动力特性;其次,结合开展的自升式平台冰荷载模型实验研究,明确带齿条桩腿的自升式平台冰荷载作用形式;最后,对渤海某自升式钻井平台在典型冰况下进行冰振动力响应分析。文中的研究对冰区自升式钻井平台抗冰设计及冰振安全评估提供了合理的参考。

As the limitations of the ice loads research, the design code of the ice-resistant jacket-up struc- tures is not based on the dynamic response analysis considering the dynamical ice force model. In order to build the reasonable ice-resistant conception design and safety assessment, the dynamic response analysis of the jack-up platform under the ice loads is essential. In this paper, the dynamics characteristics of the flexi- ble ice-resistant structures is analyzed; and based on the model test for ice forces on the jack-up platform, the interaction form between the ice and the cylindrical leg with gear teeth will be determined; Finally, the ice-induced dynamic responses are computed under the typical ice conditions by taking a jack-up plat- form in Bohai Sea as an example. This study will provide reasonable reference for ice-resistant design and safety assessment under ice vibrations of the jack-up drilling platforms.