Abstract：The free vibration of joined ,smooth and orthogonal stiffened cylindrical-spherical shell withvarious boundary conditions is studied.Based on the simplification of the joined part,the spherical shell has free boundary condition and the cylindrical shell has simply supported boundary condition. The Rayleigh-Ritz method is applied to obtain natural frequencies of the structure by Flügge’s thin shell theory. The natural frequencies are calculated and compared with those of the finite element software ANSYS to confirm the applicability and validity of the simplification. The effects of the shallowness of the spherical shell and length-to-radius ratio on the free vibrational behavior of joined structure are investigated.The results indicate that as the semi-angle Φ of the sphere increases, the natural frequencies decrease. The influence of the semi-angle Φ of the sphere on the natural frequencies decreases as length-to-radius ratio L/Rc increases,and the natural frequencies decrease and the magnitude of reducing descends.
李正良，胡 浩，于 伟. 正交加筋圆柱壳-球壳组合结构自由振动分析[J]. 振动与冲击, 2015, 34(22): 129-137.
LI Zheng-liang，HU Hao，YU Wei. Free vibration analysis of joined and orthogonal stiffened cylindrical-spherical shells. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(22): 129-137.
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