Author(s): Ning Xu; Qianjin Yue; Yan Qu; Xiangjun Bi
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Keywords: No Keywords
Abstract: The conical ice force is obtained from field measurement system on ice-insisted oil drilling jacket in the Bohai Bay. Comparison result and variation analysis between field measured value and calculated loads are carried out. Ice force is the key issue for design andperformance of structures in ice infested area. The ice force directly measured from structure in-situ, which is the most real and reliable, could be the main mean of theory verification and design ice force determination. This paper firstly introduces the ice force measurement system on the jackets in the BohaiBay; mainly include the working principle of ice load panels, the structure dynamic character from response data, and synchronous ice condition. Combined with the local ice force from load panels and structure vibration, the global ice force on ice breaking cone could beobtained by numerical model test. The comparison results with traditional ice force function show that, the ice load on real structures is larger with thin ice (less than 15cm), while the traditional ice force is conservative with thicker ice. Finally, the variation analysis on fracture mechanics and interaction process is put forwards. The ice load results are mainly on the flat ice of narrow cone, and the discussions on distinction between field test and theory analysis can arrive its popularization and application.
Year: 2010