| 下部钻具组合的几何非线性动态特性分析 |
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| 引用本文： | 张其昌,吕英民.下部钻具组合的几何非线性动态特性分析[J].中国石油大学学报(自然科学版),1996(3). |
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| 作者姓名： | 张其昌 吕英民 |
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| 作者单位： | 石油大学机电系 |
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| 摘 要： | 对下部钻具组合（ＢＨＡ）进行了几何非线性动态特性分析．所建立的动力分析模型，充分考虑了钻柱与井壁的碰击、间断或连续的活动和滑动，把Ｎｅｗｍａｒｋ法与Ｎｅｗｔｏｎ－Ｒａｐｈｓｏｎ法有机地结合起来，用来求解钻柱几何非线性动态特性，在算法上是一种尝试．计算表明．井斜曲率、方位曲率及阻尼系数对典型钻具组合的动态特性均有一定的影响．应对增斜及降斜的钻具组合和井眼曲率超过５°／３０ｍ的稳斜和光钻铤钻具组合进行非线性动态分析例计算．
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| 关 键 词： | 钻具组合 有限元法 非线性 动态分析 |
NONLINEAR DYNAMIC ANALYSIS FOR BOTTOMHOLE ASSEMBLY |
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| Zhang Qichang,Lu yingmin.NONLINEAR DYNAMIC ANALYSIS FOR BOTTOMHOLE ASSEMBLY[J].Journal of China University of Petroleum,1996(3). |
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| Authors: | Zhang Qichang Lu yingmin |
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| Abstract: | The nonlinear dynamic analyses for BHA were carried out. An improved dynamic analysis model was set up. As a new algorithm, Newmark method was reasonably integrated with Newton-Raphson method to solve the nonlincar drillstring dynamics equation. The hole curvature and damp coefficiency have some effects on BHA dynamics behavior. |
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| Keywords: | Bottom-hole assembly Finite element method Nonlinear Performance analysis |
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