Development of a simple elastic-plastic connection model describing the dynamic interaction characteristics of component connections

Nishida, Akemi  ; Araya, Fumimasa; Kushida, Noriyuki; Kondo, Makoto; Sakai, Michiya*; Shiogama, Yuzo*

In this study, we propose a physical model that can describe dynamic characteristics of the joints between different components in a nuclear plant, with a view to understanding the entire and local behaviors of the nuclear plant simultaneously. The physical model, called as the elastic-plastic connection model, is presented in this paper, which considers the dynamic interaction between the joints of the support structures of the component and the building itself. By using this model, it becomes possible to introduce a partial elastic-plastic (non-linear) model into a large-scale three-dimensional elastic (linear) model. The precision of the elastic-plastic connection model was optimized by adjusting its parameters using the data obtained in the experiment. In addition, we showed that the elastic-plastic connection model can be used for numerical simulation with three-dimensional real plant data.