Study on Equivalent Viscous Damping Coefficient of Sucker Rod Based on the Principle of Equal Friction Loss

<p>Relationship between damping coefficient and radius of sucker rod. (a) r<sub>1</sub>= 20.5 mm, (b) r<sub>1</sub>= 25.3 mm, (c) r<sub>1</sub>= 31 mm, (d) r<sub>1</sub>= 38 mm, (e) r<sub>1</sub>= 44.2 mm, and (f) r<sub>1</sub>= 50.3 mm.</p>

Mathematical Problems in Engineering

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Figure 4

Figure 4: Study on Equivalent Viscous Damping Coefficient of Sucker Rod Based on the Principle of Equal Friction Loss 