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。
A problem about tubing string vibration caused by the fluid unsteady flow inside tubing string is studied from the Angle of solid liquid coupling vibration in dynamics.
文章从动力学中固液耦合振动的角度出发，研究了油管柱内流体不稳定流动引起的油管柱振动问题。
The quark-fragment effects in the source term are described by using the phenomenal SU(3 ) string model with a flavor dynamics.
源项中的夸克碎块效应则是通过唯象SU（3）弦模型味动力学进行描写的。
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