Study on Dynamic Buckling Simulation Methodology for Cylindrical Shell due to Seismic Excitation. 1st Report. Evaluatin of Influence of Initial Imperfection.

Abstract

The containment vessel of a nuclear power plant, the LMFBR reactor vessel and a tall cylindrical tower are thin cylindrical shell structures of large diameter. Development of an evaluation technology for dynamic buckling of these structures due to wind or seismic loading is becoming very important. Some research works have been conducted recently, but the analysis generally requires unpractically large amount of CPU time. The development and the utility of a practical dynamic buckling analysis code using FEM, in which lumped masses, initial imperfection, and so on, can be taken into account, are reported here.