Free vibration analysis of a hermetic capsule by pseudospectral method |
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Authors: | Jinhee Lee |
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Affiliation: | 1.Department of Mechanical and Design Engineering,HongikUniversity,Chochiwon, Choongnam,Korea |
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Abstract: | A pseudospectral method is applied to the axisymmetric free vibration analysis of a hermetic capsule. The displacements and
the rotation of a hermetic capsule are expressed by the Chebyshev expansions. The equations of motion are collocated to yield
the system of equations in the hemispherical regions and the cylindrical region separately. The numbers of collocation points
are chosen to be less than those of the expansion terms. The continuity conditions of deformations and stress resultants at
the junctions serve as the constraints of the expansion coefficients. The set of algebraic equations is condensed so that
the total number of the expansion terms matches the total number of degrees of freedom of the problem. Present method might
be useful in the analyses of composite shell structures where different types of shells are joined together. |
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