| 摘 要： | In this paper, an additional stiffness matrix of meridional geometric imperfections wasformed by considering the geometric imperfections as initial displacements based onreference7].Then, natural frequencies and models of rotational shell with symmetricgeometric imperfections were analysed by perturbation method.From the computedexample, it was known that the effect of geometric imperfections of frequencies is toincrease them, and the larger the range of imperfection, the more the frequencies would beincreased.
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