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概要

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Sometimes the results of fitting the Truss between the Posts in order to reduce severe vibration are not satisfectory, as we have not adequate method to determine the scantling of the Truss. After studying the relation between number of frequency and rigidity of Truss and elastic condition of base of the Post, we get the following empirical formula for calculating number of frequency of this system, using the results of actual ships: f=4.0×d/h^2×10^4×η/min. where f: number of frequency per min. d: out dia. of posts at their uppermost suppot (m) h: height of posts from the uppermost support to the top of posts (m) η: correction factor depends on the rigidity of truss and elastic condition of the posts (may be get from the curve)
社団法人日本船舶海洋工学会の論文
1959-03-25