선형 전단유동장내 수중세장체의 와유기진동 실험계획

Abstract

The experiment on VIV(Vortex Induced Vibration) of marine slender structure model in linearly sheared flow is designed in order to get data for tuning and confirming the 3-D Nonlinear Analysis code for the marine slender structure and to investigate the high mode vibration of marine slender structure. The experiment set-up is composed of the marine slender structure model, FBG strain sensor, rotating motion structure, vibration noise filter mechanism and tension keeping mechanism. The marine slender structure model, made of FRP, is 16m in length and 34.8mm in diameter. FBG strain sensor is embedded in the model. The rotating motion structure is used to exert linearly sheared flow for the model. Vibration noise filter mechanism is composed of mass-spring for 3 translation coordinates, and its role is to isolate the model from vibration noise caused from CPMC motion. Tension keeping mechanism keeps the tension of the model in 20~300kgf.