複数の非線形集中ばねで支持された弾性ブロックの周波数応答の高速FEM解析(機械力学,計測,自動制御)

概要

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A fast computational method is proposed to calculate nonlinear vibration characteristics for elastic blocks supported by plural nonlinear concentrated springs using finite element method. The restoring force of the springs is expressed as power series of displacement. Finite elements for the nonlinear springs are added to the nodal force of elastic blocks modeled by linear solid finite elements. Further, the discretized equations in physical coordinate are transformed into nonlinear ordinary coupled equations using normal coordinate corresponding to linear natural modes. First, the proposed method for the case having plural nonlinear springs is verified. Next, as a numerical example, influences of Young's modulus on nonlinear frequency responses for the elastic blocks with nonlinear springs are demonstrated.
一般社団法人日本機械学会の論文
2006-12-25