抄録
The equipment and the piping systems of the nuclear building with the natural frequency at high frequency band of more than 20Hz is basically considered the rigid body and the static seismic design which uses floor response spectrum of support structure is implemented. Therefore it is conservative design for including major safety margin. In background of that, the establishment of the more rational evaluation methods is very important, now. And that study focused attention on the method based on energy balance the vibration characteristics of mechanical structure, and studied from the experiment and the analysis point of view.
