長大倉口船の捩り-曲げ連成固有振動の研究(第3報) : 薄肉開断面棒の捩り振動に及ぼす横隔壁の影響

概要

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As already pointed out in the 2nd report (I), transverse bulkheads have predominant effect on the natural frequencies of the lower modes of torsional vibration of a bar with thin-walled open cross section. This paper deals theoretically with the effect of transverse bulkheads on the natural torsional frequencies of a bar of thin-walled open cross section with two axes of symmetry by the matrix method. The theoretical result shows that the effect of transverse bulkheads on the natural torsional frequencies ressembles the effect of torsional rigidity GJ, and the effect of transverse bulkheads can be treated by the use of the equivalent torsional rigidity GJ. This conclusion is found to be applicable also to a bar of open cross section with one axis of symmetry, and the accuracy of this method is confirmed to be satisfactory by the experimental results of model tests.
社団法人日本船舶海洋工学会の論文
1968-09-30