三層構造球形シェルの振動減衰解析(機械力学,計測,自動制御)

概要

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An analysis of vibration and damping of composite spherical shells with a constrained visco-elastic core are presented. The vibration damping properties are analyzed by means of the Ritz method. Displacement functions satisfied with boundary conditions are expressed by a power series. The elastic modulus of the core is treated as a complex quantity to take account of structural damping. The complex eigenvalue problem, which is derived by means of minimizing the energy functional, is solved to determine the natural frequencies, modal loss factors and mode shapes. The accuracy and validity of the present results are confirmed by the convergence study and comparison with published data. Numerical results are presented for different parameters, such as circumferential wave numbers, opening angles, ratios of core thickness to total shell one and the shear moduli of the core.
社団法人日本機械学会の論文
2002-07-25