Research Article
Mathematical Modeling and Analysis of Drill String Longitudinal Vibration with Lateral Inertia Effect
Table 4
Calculation parameters of the damping coefficient influence.
| Name of parameters | Results |
| Poisson’s ratio of the drill string | 0.30 | Length of the drill string (m) | 2000 | Outside radius of the drill string (m) | 0.10 | Inside radius of the drill string (m) | 0.08 | Damping coefficients , (Ns/m) | 8000 | Damping coefficients , (Ns/m) | 10000 |
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