Abstract:
An axisymmetrical cylindrical shell model with conical and half spherical cap ends is established. Using finite element method and boundary element method, the effect of different excitations on the acoustics and vibration characteristics, the relations between structure parameters and the acoustics and vibration characteristics are investigated. Our results show that: comparing with other excitations, the axial moment excitation has the greatest effect on the acoustics and vibration characteristics, the radial force and axial force also have the contribution to such effect, and the impact of circumferential force is minimum.With the same excitation, when shell thickness or ring stiffeners number of the model increases, the effect of the acoustics and vibration characteristics is not same in the different frequency range of the excitation.
