应用数值计算方法，分析了偏心钻头底部钻具组合的受力和变形特性。
The mechanical properties and the deformation characteristics of the BHA with the eccentric bit are analyzed.
建立了底部钻具组合动态分析的数值模型，推导了动态分析的有限元微分方程。
A numerical model of bottom-hole assembly was developed and the differential equations of finite element for its dynamic analysis were derived.
该程序通用性强，计算精度高，简单省时，适用于各种底部钻具组合的模拟计算。
The computer program developed according to analysis results has the advantages of universal application, higher accuracy, simplicity and time saving.
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