Aerodynamic Damping Model for Vortex-induced Vibration of Suspended Circular Cylinder in Uniform Flow

This study addresses modeling of aerodynamic damping for a two-dimensional (2-D) suspended circular cylinder in uniform flow, and aims to provide an appropriate model for predicting vortex-induced vibration (VIV) of a circular cylinder. Full-scale and wind-tunnel tests have revealed that the crosswind response of a circular cylinder such as a steel chimney calculated by aerodynamic damping models recommended in several international codes is dramatically overestimated for most cylinders with Scruton numbers less than 15, so these models are restudied and discussed. This paper proposes an improved aerodynamic damping model that shows good agreement with experimental results. The proposed model is further verified by estimating the transverse displacement responses of suspended circular cylinders tested in uniform flow and the predicted results are promising. The proposed model provides a theoretical basis that can be used to develop an aerodynamic damping model for bridge decks as well as other structures.

Automated summary

This study proposes an improved aerodynamic damping model for predicting vortex-induced vibration of a suspended circular cylinder in uniform flow, which shows good agreement with experimental results. The model provides a theoretical basis for developing aerodynamic damping models for bridge decks and other structures in the future.