Added Mass and Damping Forces on Circular Cylinders.
NAVAL RESEARCH LAB WASHINGTON D C
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Results of experiments to determine the fluid loadings on harmonically oscillating circular cylinders show that the inertial added mass component of the loading is in good agreement with the inertial loading predicted by potential flow theory. The results show, however, that the commonly used velocity-squared law for damping is inadequate. In fact, experiments indicate that fluid damping is sensibly viscous linear for vibration amplitudes up to 0.8 diameter peak-to-peak and is a combination of viscous and velocity-squared damping at larger amplitudes. This new damping law has important implications for the design of offshore structures. Author
- Fluid Mechanics