Abstract
Japan is famous land of earthquake in the world. As for the nuclear power plant, high earthquake-resistant design is required. As a rule, the equipment and the piping system is assumed as rigid structure. In earthquake-resistant design phase, it is designed by using static design method. But, the earthquake is cyclic load. Therefore it is very important to grasp vibration. In this paper, forced vibration experiment and continuous vibration experiment are examined, and these results are evaluated from viewpoint of energy balance.
