MODELING FOR ANALYSIS OF HIGH DAMPING RUBBER BEARINGS WITH EFFECTS OF FATIGUE AND TEMPERATURE INCREASE DUE TO REPEATED DEFORMATION

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  • MORI Takahiro
    Infrastructure Products Development Dept., Bridgestone Co., Dr. Sci.
  • KATO Hideaki
    Infrastructure Products Development Dept., Bridgestone Co., M. Sci.
  • MUROTA Nobuo
    Mgr., Infrastructure Products Development Dept., Bridgestone Co., Ph. D.

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  • 繰返し変形による疲労と温度上昇の効果を取り入れた高減衰積層ゴムの解析モデルの検討
  • クリカエシ ヘンケイ ニ ヨル ヒロウ ト オンド ジョウショウ ノ コウカ オ トリイレタ コウゲンスイ セキソウ ゴム ノ カイセキ モデル ノ ケントウ

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Abstract

In this study, we propose FEM analysis model and time history response analysis model for high damping rubber bearings. These models can be used for the condition of repeated deformation which is often caused by the long-period ground motion or wind response. In this condition, high damping rubber bearings experience stiffness degradation due to fatigue and temperature increase of inner rubber. First, by taking account of these two effects, we establish the constitutive law of high damping rubber material for FEM analysis model and check the reproductivity of test results. Next, we derive the hysteresis model from the constitutive law of high damping rubber material. A prediction equation of temperature increase for the hysteresis model is determined from thermal FEM analysis.

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