126 パネルを有する弾性フレームに非線形集中ばねを接続した系のFEM衝撃応答解析(モデリング・非線形・最適化,OS-9 モード解析とその応用関連技術,総合テーマ「伝統を,未来へ!」)

概要

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This paper describes vibration analysis using finite element method for elastic frames with a panel connected by nonlinear concentrated springs under impact load. The restoring force of the spring has cubic nonlinearity and linear hysterisis damping. Finite element for the nonlinear spring is expressed and is connected to the elastic frames with the panel modeled by linear solid finite elements in consideration of complex modulus of elasticity. Further, the discretized equations in physical coordinate are transformed into the nonlinear ordinary coupled equations using normal coordinate corresponding to linear natural modes. This transformation yields computation efficiency. Influences of vibration damping and rigidity of the frame are clarified on the nonlinear impact responses.
一般社団法人日本機械学会の論文
2010-09-14