Describes drill string dynamics system models and numerical algorithms. And describes the details of NEWMARK method and HHT method.
介绍了钻柱系统动力学模型以及其数值算法，对直接积分法中的NEWMARK法和HHT法的计算过程进行了详细的阐述。
In the program the large deformation are considered by using Total Lagrange described method and time discreteness with Newmark method.
程序中考虑了结构的大变形，采用全拉格朗日描述法，时间离散使用了纽马克法。
In the program the large deformation are considered by using Total Lagrange described method and time discreteness with Newmark method.
程序中考虑了结构的大变形，采用全拉格朗日描述法，时间离散使用了纽马克法。
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