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Numerical simulation system "three-dimensional virtual plant vibration simulator" for nuclear plants by using assembled structural analysis

Nishida, Akemi  ; Matsubara, Hitoshi; Tian, R.; Hazama, Osamu; Suzuki, Yoshio   ; Araya, Fumimasa; Nakajima, Norihiro  ; Tani, Masayuki; Kondo, Makoto

Unexpected accidents such as oil-tank fires caused by the earthquake and breakage of pipes of nuclear plants have occurred over the past several years. Higher reliability is thus now increasingly expected to maintain the safety of infrastructures. We have been intensely focused on the construction of an analysis system called the "three-dimensional virtual vibration testbed," which is a numerical simulation system for a nuclear plant which considers the interconnection of machines, pipes, buildings, and their foundations under real operating conditions. In this paper, the "part-wise analysis method" is proposed in which each structural component is treated independently and analyzed as an assembly structure. Further, the system configurations in a parallel distribution environment are described. This study shows one of the successful examples of the application of this method to a nuclear-plant cooling system that has tens of millions of degrees of freedom.



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