面内力を受け初期撓みを有する防撓板の振動

概要

論文の詳細を見る
This paper describes the dynamic characteristics of stiffened plate having geometrical imperfection and subjected to uni-axially in-plane compressive load. The geometrical imperfection and in-plane load are treated taking into account of additional terms in the strain-displacement relations, as treated by von Karman. The numerical analysis is performed by use of FEM code 'BUKVIB' developed by the authors. The following results are obtained. Firstly, the natural frequencies increase with the increase of the initial deflection, especially when mode shape is similar to that of imperfection. Secondly, the localization of natural modes is observed when the imperfection is partial. Thirdly, the vibration characteristics of stiffened plate subjected to in-plane load are investigated. When the plate has no initial deflection, it is found that the natural frequency of vibration modes which are identical to the buckling modes of stiffened plate with no initial deflection decrease with increasing in plane load. The frequency of stiffened plate with initial deflection is higher than that without imperfection.
社団法人日本船舶海洋工学会の論文
1992-03-29