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钻柱力学中接触力计算方法研究

DOI: 10.6052/1000-0879-13-555

Keywords: 钻柱力学,三维钻柱力学模型,接触力,柔度矩阵,算法

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Abstract:

钻柱在井底的接触力计算是一个复杂的非线性问题.选取较为精确的三维钻柱力学模型(简称ABIS)作为研究对象,力图从复杂的求解过程中探索出更直观的方法.从钻柱某个节点的接触力与位移关系,推广到该节点接触力与钻柱其他所有节点的位移均存在同样的关系,进而建立了整根钻柱位移与作用在钻柱上的所有接触力的更直观的柔度关系式.据此提出新的接触力计算方法,算例结果表明该方法显著提高迭代速度.

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