This paper analyzed the practical situation of drilling string lateral vibration during drilling, established mechanical model.
文章针对钻井工程中钻柱横向振动的实际情况，建立力学模型。
Then three-dimensional geological and mechanical model was established, and study of spatial deformation characteristics with FLAC-3D (Fast Lagrangian Analysis of Continua) was detailed.
并建立了相应的三维地质力学模型，应用FLAC 3D快速拉各朗日差分程序对其空间变形特征进行了详细的分析。
The author has established the mechanical model of O-chain iron and U-chain iron respectively, obtained the computing formula of load and stress, and contrasted with example.
本文分别建立了O形环与U形环的力学模型，推导出了载荷、应力分布的计算公式，并引用实例进行了对比分析。
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