六角棒7本の流体連成振動特性

概要

論文の詳細を見る
Vibration characteristics of hexagonal bars in liquid were experimentally and analytically studied to verify analytical methods for fluid-structure interaction vibrations. Vibration experiments were conducted to acquire precise data of natural frequencies and eigenmodes of a seven-hexagonal-bar system. The seven hexagonal bars were installed in a tank, arrayed in a hexagonal matrix and immersed in water. The information from eleven modes out of the predicted fourteen modes was obtained through the experiments. The experimental results were compared with analytical results calculated by two finite element models. Three-dimensional analysis, in which the finite length of hexagonal bars was considered, yielded results which agreed well with experimental ones. Two-dimensional analysis, in which the virtual mass was assumed to be constant along the bar axis, overestimated the virtual mass especially for the predominant mode to base excitation. These results showed that a three-dimensional method is required for vibration analysis of the experimental model dimensions.
一般社団法人日本機械学会の論文
1993-01-25