カドワキ　レン   Ren Kadowaki   門脇　廉    所属   追手門学院大学  理工学部 機械工学科    職種   准教授
発表年月日	2019/11
発表テーマ	Classification of Characteristic Modes for Vibration Reduction
会議名	Asia Pacific Vibration Conference 2019
学会区分	国際学会
発表形式	その他
国名	オーストラリア
開催地名	シドニー工科大学（オーストラリア，シドニー市）
開催期間	2019/11/18～2019/11/20
発表者・共同発表者	中島 樹,井上 卓見,門脇 廉
概要	The finite element method (FEM) is useful for vibration analysis. However, it takes time to evaluate and reduce vibrations of large-scale structures such as automobile bodies. Especially, when treating coupled modes that consist of global and local deformations, it is necessary to reinforce respective parts that relate to each deformation. This is because applying incorrect reinforcement settings contribute to vibration increase. The purpose of this study is to classify each characteristic mode into groups depending on approaches for vibration reduction. Especially for structures such as automobile bodies, it is effective to focus on global and local deformations of each mode. Focusing on these deformations, we classified the characteristic modes of an automobile underbody structure into three groups: global modes, local modes and coupled modes. By means of the classification, we proposed effective vibration reduction approaches for each mode group. Furthermore, the effectiveness of the presented classification and vibration reduction method for each mode group is demonstrated.