722 FRPシートにより補強された柔軟構造物のロバスト設計(モデル化・欠陥同定・振動利用)(OS.06 : 振動基礎)

概要

論文の詳細を見る
This paper presents a robust design method of a flexible structure reinforced by FRP sheets. A FRP sheet has a high ratio of strength to weight and is widely used as a stiffener of structure in various fields. Vibration characteristics of the structure reinforced by FRP sheets can be easily modified by changing design variables such as the relative volumes of fibers and matrix, the fiber angle and the number of layers. Therefore small variation of design variables gives rise to drastic change of the vibration characteristics. In this paper, the attention is focused on the variation of modulus of longitudinal elasticity of the structure reinforced by FRP sheets. We propose a constrained condition that can take into account the variation band of the elasticity of the structure and specify the total variation of natural frequencies of low order modes. For the purpose of maximization of natural frequencies, the design variables are determined by using optimization technique under this condition. The validity of the present method is verified by numerical examples and by comparison with results of experiments.
一般社団法人日本機械学会の論文
2001-08-03