EFFECT OF ROTATION ON VIBRATION OF MODERATELY THICK CIRCULAR CYLINDRICAL-SHELLS

Circular cylindrical shells rotating about their axis of revolution ar e analyzed for natural frequencies and damping factor using moderately thick shell theory with shear deformation and rotatory inertia. A sub parametric axisymmetric finite element with 5 nodes to represent the f unction variations, and 2 nodes to represent coordinate variations is used for the solution. Full Fourier expansion is used in the circumfer ential direction to overcome the effect of material anisotropy and Cor iolis component. The effect of rotation on frequencies is studied by i ncorporating the Coriolis acceleration, rotational energy, prestressin g due to centrifugal force, and damping due to material.