3224 直交流で発生する管群振動の解析

概要

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It is well known that tube bundles in cross flow oscillate when the flow velocity exceeds a critical value. Source of the vibration must be fluid dynamic forces on the tube bundle. The equation of a tube vibration under many kinds of fluid dynamic force was deduced and the fluid dynamic forces were experimentally obtained. Vibration mechanism of the tube bundle was investigated with the equation of motion and measured fluid dynamic forces. The analysis of tube bundle vibration has been conducted as a damping controlled vibration that will occur at low reduced velocity and stiffness controlled vibration that will occur at high reduced velocity. However, the analytical study clarified that the vibration mechanism can not be classified into damping control and stiffness control. It was found that only the combined mechanism can define the characteristics of the tube vibrations.
社団法人日本機械学会の論文
2000-07-31