18. Study On Vibratory Response of Deck in Superstructure

概要

論文の詳細を見る
Deck panels of passenger ships or some kinds of research ships which usually require wide floor area for accommodations have long span between supports, and their natural frequencies are necessarily lowered. In these ships, it would be difficult to design panels so as to avoid resonance by tuning the fundamental frequency above frequencies of exciting forces. It is therefore necessary to verify that, not only the fundamental but, also the higher modes of panels do not resonate with the exciting forces and/or that those resonant amplitudes are as small as allowable. This paper presents a simplified method to calculate the natural frequencies and the response of deck panels to the excitation given along their boundary. Then the vibration of main hul1 girder, as an excitation source, is investigated, where coupling with long superstructure is taken into account. Results of vibration tests on actual ships showed that general procedure proposed in this study is adequate and that the deckcovering materials have significant damping effect on panel vibrations. Finally a simplified technique is proposed to predict the vibratory characteristic of deck panels, together with several recommendations for the antivibration design of superstructures. Although the higher mode responses are much smaller than that of the fundamental frequency, it is recommended to keep second mode frequency of panels well apart from the fundamental one by means of such a structural arrangement as stiffening in two perpendicular directions. In these panels it is easier to adjust the exciting frequency between the fundamental and second mode frequencies.
社団法人日本船舶海洋工学会の論文

18. Study On Vibratory Response of Deck in Superstructure

スポンサーリンク

概要

著者

関連論文

スポンサーリンク