| Abstract: | The method presently adopted in the offshore industry for predicting the amplitude of vibration of circular cylinders undergoing in-line vortex-induced excitation is demonstrated to be valid only for structures in uniform flows at sub-critical Reynolds numbers.A model which predicts the response of structural elements experiencing this phenomenon where the diameter, mass, and velocity of flow varies along the length of the structure is presented. Comparison between the results of this method and available experimental measurements is made.The model is structured to be an easily applied design tool producing an upper-bound estimate. |
