... subsea system final regression equation model test bohai sea strength upstream oil & gas full scale force ice load sketch ice sheet ice force offshore technology conference References References Huang , Y. , 2010 . Model test study of the nonsimultaneous failure of ice...

... characteristics but the ability to move between the drilling locations is very limited and the application of these units requires large water depths. ice load subsea system natural heave period ice force transit draft jbf arctic heave response otc 21531 drilling unit open water model test ice...

... ABSTRACT This paper presents a theoretical method for calculation of dynamic loads and average ice forces on sloping structures and ships in ice of uniform thickness. The method is used for estimation of ice loads on inclined structures, resistance of ice transiting vessels and ice force...

... ABSTRACT Indentor shape plays an important role in reducing ice load on Arctic offshore structures. Ice forces on single wedge indentors are investigated for crushing failure mode. The maximum indentor wedge angle, ?, of different diameters at diverse ice attack angles, ?, are obtained. using...

... and cost analysis involved eight steel or concrete structures, and considered "base case" combinations of global and local ice forces at the three sites. A subsequent sensitivity study considered one concrete structure for each water depth, and determined changes in configuration, weight and construct...

... of deep water jackets in subarctic seas are also discussed. feasibility finite element analysis nippon steel usa inc ice force model test tatsuta mechanism multi-leg structure upstream oil & gas conductor ice load vertical leg compressive strength confinement inclination nippon...

... ABSTRACT This paper describes a series of model tests carried out on caisson-type Arctic structure. The tests were conducted to determine ice forces induced on a vertical sided structure and to observe the rubble field formation. The ice load tests were performed on an aluminum model...

... ABSTRACT Extreme ice forces on offshore structures appear to be proportional to the square root of the projected contact area. An analogy in indentation of brittle foam suggests a simple theory, which explains the size effect in ice through non-simultaneous failure. INTRODUCTION Offshore...

... ABSTRACT A joint Finnish consortium of industry and state research organizations has designed, constructed and instrumented a conical test structure for full-scale measurements of ice forces against a conical fixed off-shore structure. The structure and its instrumentation are described...

... Arctic and sub Arctic offshore structures results from contact with sea ice. Ice strength, level ice characteristics, ice ridge characteristics, and other relevant ice parameters are defined. Ice forces on each of the structural configurations considered are determined and the selected offshore crude oil...

.... A sub sea berm was constructed and tested prior to placement of the caisson. The caisson was installed in September 1984 by ballasting it down onto the berm and subsequently filling the central core of the caisson with sand for stability against sea ice forces. In the interests of safety, the berm...

... relationships were observed between the. strain rate of ice and both the ice force and the response of the model structure. The test results were analyzed using a rather simple analysis model which took the strain rate dependent ice force into consideration. The analysis model reasonably predicted the dynamic...

... at constant velocity it is equivalent to the mean effective pressure generated during ice action. The specific energy of ice is of interest for studying the impact phenomenon and for estimating the ice force and pressure. Since impact of a large ice floe or an iceberg with a drilling platform is a possibility...

... ABSTRACT This paper reviews the overall logic to ice loads on structures and discusses the applicability of the limiting driving force approach to ice loads. It is suggested that "limit-force" loads may control ice forces in the winter on future production platforms placed beyond the land fast...

... to arrive at both the global ice force and the local ice loads. The sliding resistance of the structure will be discussed in somewhat more detail but on a generalized sitting basis. Methods of achieving the desired sliding resistance in various soils will be presented. The use of the Super CIOS as a Mobile...

... the resultant forces and moments into the foundation thus developing a relatively high concentrated reaction force against the ice tending to spall and split it, thus causing a multi-modal failure of the ice, as well as using up kinetic energy at a relatively controlled rate. Calculated ice forces and ice...

... ABSTRACT Ice action on two cylindrical structures, located side by side, has been investigated in a small-scale experimental study to determine the interference effects on the ice forces generated during ice structure interaction. The proximity of the two structures changes the mode of ice...

... ice force caisson floe ice interaction ice load island upstream oil & gas offshore technology conference tarsiut winter alert aTe 4518 Tarsiut Winter Alert Monitoring by B.D. Wright, Gulf Canada Resources Inc., and J.S. Weaver, I.SE Engineering Consultants Ltd. Copyright 1983 Offshore...

... objective. This work was primarily orientated to collecting data on winter ice forces and island response to these forces. Geotechnical data on caisson "setdown" pressures, island settlements, and ground temperatures were al so collected as part of the research program. The remainder of this paper...

... are provided for the two dissimilar environments. In open water the operating draft is 21.5m (70.5 ft), and the column shape is cylindrical to minimize wave induced motions. ice test ice force drilling equipment subsea system pressure ridge riser protector ice condition mitsui thickness...