Dynamic buckling analysis of a hemisphere subjected to external fluid pressure

PNC TN9410 93-037, 99 Pages, 1992/12

PNC-TN9410-93-037.pdf:1.86MB

In the frame work of international cooperation between PNC and European AGT9B, benchmark studies were planned on the structural integrity analyses, Among these, a problem on the dynamic buckling of a hemisphere was supplied by the European side. A small annular gap between two concentric hemisphere is filled with water and the whole system is subjected to a vertical harmonic excitation so that the inner thin shell buckles by the dynamic fluid pressure. The problem is to infer the frequency of the excitation and the pressure at which the hemisphere buckles. An intensive series of analyses were performed using a general purpose non-linear finite element code, FINAS. The analyses were a blind test since no information was available on the experimental results. It is inferred as a result of the analyses that; (1)The frequency of the excitation is 27 Hz. (2)The critical buckling pressure is about 0.16 MPa. (3)The fundamental vibration mode and the buckling mode are axi-symmetric, and the buckling occurs in the elastic range. Discussion on the adequacy of the analyses will be made when the experimental result is available.

Natural vibration characteristics of coaxial double-pipe structure

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Nihon Genshiryoku Gakkai-Shi, 27(6), p.553 - 562, 1985/00

https://doi.org/10.3327/jaesj.27.553

no abstracts in English

Seismic Analysis of the JT-60, 1; Analysis Method and Eigenvalue Analysis

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JAERI-M 8155, 159 Pages, 1979/03

JAERI-M-8155.pdf:4.19MB

no abstracts in English