由于现在人们对底部钻具组合的受力和变形分析研究仍主要处于静态阶段 ,认为在纯静态的分析中加入一点动态的影响 ,即考虑钻头在钻进时弯矩不断变化的事实 ,将钻头处的边界条件按固支和铰支各计算 1次 ,最终结果取这 2次结果的平均值 ,这可能比只按固支或铰支所得结果更接近真实值。 Since the research on the stress and deformation of the bottom hole assembly is still mainly in the static phase at present, it is considered that adding a little dynamic influence to the purely static analysis, that is, considering the fact that the bending moment changes when the bit is drilling, The boundary conditions are calculated once for each branch and branch and the final result is taken as the average of these two results, which may be closer to the true value than if the result was only fixed or hinged.