517 エネルギー釣合式による多質点系モデルの耐震性評価に関する研究

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  • 517 Study on Seismic Evaluation for Multiple Degree of Freedom Models by Energy Balance Method

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Generally, Mechanical structures in nuclear power generation facilities are demanded highly safe to resist earthquakes. In addition, highly safe is requested quantitatively of earthquake resistance and reasonable evaluation approach. This study uses energy as an evaluation approach. Recently, Energy Balance Method is paid attention to a new design and evaluation method. The study is used and constructed the extended Energy Balance Equations. Multiple degrees of model need to propose the new method. The new method proposes "method by the matrix", "method for paying attention to each mass", and "method for paying attention to the mode of vibration". In this report, the modeled mechanical structure is failed by shaking experiments. In addition, an experiment is using a strain gauge to examine the transformation of the mode of vibration. A strain gauge is set up five places. The experiment inputs a random wave and changes the excitation condition. This result, the first mode has a big strain in test piece bottom. Second mode has a big strain in the first mass and the test piece bottom.

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