船体と上部構造との連成振動 : 船体上下振動の定性的検討

概要

論文の詳細を見る
This paper deals with the coupled effect between a fore-and-aft vibration of superstructure and a vertical vibration of ship's hull. Characteristics of the coupled vibration were discussed by using the simple model, namely, one beam and mass-spring model. Main conclusion are as follows : 1) Coupled effect depends on four parameters. One is position of superstructure. Second is a ratio of distance between fore and aft wall of superstructure to ship's hull length. Third is a mass ratio of superstructure to ship's hull. The last is an uncoupled natural frequency ratio. 2) Natural frequencies of the coupled vibration obey the law of so-called "spring-off". But the law of "spring-off" for vertical vibration is rather complicated compared with that for longitudinal vibration. 3) When uncoupled natural frequencies coincide with each oter, coupled ones spring off in the largest amount.
社団法人日本船舶海洋工学会の論文
1980-09-30