基準座標で記述されたFEMを用いた非線形集中ばね+弾性ブロックの振動解析 : 非線形復元力が相対変位の関数になる場合(機械力学,計測,自動制御)

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This paper describes vibration analysis using finite element method for elastic blocks connected by a nonlinear concentrated spring. The restoring force of the spring is assumed to be expressed by power series of the relative displacement between ends of the spring. Finite element for the nonlinear spring is expressed and is connected to the elastic blocks modeled by linear solid finite elements. 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 Young's modulus on nonlinear frequency responses for the elastic block are clarified.
一般社団法人日本機械学会の論文
2006-02-25