抄録
This paper describes aerodynamic characteristics of a 3-D square prism having low structural density. The New Hybrid Aerodynamic vibration Technique is applied to conduct the aerodynamic vibration experiment. In this experiment, the wind force coefficient can be estimated even under unstable aerodynamic vibration and it can be confirmed that the on-set wind velocity get lower in the case of low structural density even though the mass-damping parameters are similar. In order to analyse the phenomena and re-estimate the aerodynamic vibration parameters, the added-mass coefficient based on added-mass effect is introduced. The re-estimated parameters get good agreement with the result of experiment. Some tendencies can be obtained from the result of re-estimated parameters. The on-set wind velocities are estimated based on the ratio of added-density and the response curves. The results get good agreement with the experimental results.
