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工程力学  2014 

基于静动力的在役钻机井架承载性能研究

, PP. 250-256

Keywords: 钻机井架,模型修正,静动力学特性,时程分析,抗震性能,极限承载能力

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Abstract:

井架作为石油钻机的重要承载设备,其承载性能直接关系到整套钻机系统的安全运行。为了准确预测安全承载能力,综合考虑静动力学特性,提出了联合静动力的分层次模型修正方法。在灵敏度分析和工程经验的基础上,以反映结构性能参数的残差最小作为目标函数,构建优化修正模型,利用一阶搜索优化算法实现模型修正问题的求解。以某在役海洋钻井平台使用的井架为例进行分析,结果表明修正后的模型能全面、正确地反映结构的静动力特性,验证了该方法的可行性和必要性。基于此,利用修正后的模型动态模拟钻井加载工况、分析多遇地震响应以及进行偶遇极端工况下的双重非线性分析,从而预测了井架的失稳状态、破坏形式和极限承载能力。为在役钻机井架的安全承载能力预测和和抵抗突发恶劣工况的预报提供一个新思路,具有一定的实用价值。

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