Effects of geometric and material imperfections on the dynamic response of cylindrical shells subjected to underwater explosion
Kaufman, Robert E.
Shin, Young S.
MetadataShow full item record
The effects of initial geometric and material property imperfections on the non-linear dynamic response of cylindrical shells subjected to an underwater explosion was investigated. Finite element and boundary element programs were used to perform the analysis of the dynamic response of these shells. The geometric and material modal imperfections were introduced into the finite element models. The dynamic response and deformation of the cylinder were then compared for each of the eight modal imperfection cases to the dynamic response of a perfect cylindrical model. The modal imperfection distribution of the combined geometric and material imperfections are then introduced into an aluminum model and compared to experimental results obtained from underwater explosion testing. This analysis shows that a more accurate prediction of the damage and dynamic response is achieved by introducing these imperfection distributions into the numerical analysis.
Showing items related by title, author, creator and subject.
Analytic and experimental investigation of rotordynamic response and backward whirl induced by split resonance Vejvoda, Curtis E. (Monterey, California. Naval Postgraduate School, 1994-12);Rotordynamic response phenomena, including backward whirl, were investigated both analytically and experimentally. A two degrees-of-freedom rotor model was developed to simulate the steady state, lateral vibration ...
Lee, Jae-Nam (Monterey, California. Naval Postgraduate School, 1983-12);The non-linear elasto-plastic response of a clamped flat plate to a typical air shock wave were investigated. The nonlinear effects to the plate responses due to the material and geometric nonlinearity were studied. In ...
An investigation of the nonlinear dynamic response of cylindrical shells under transient pressure. Cromer, Charles Clinton (Naval Postgraduate School, 1969);A numerical algorithm was developed for computing the nonlinear dynamic response of a ring-stiffened, nearly circular cylindrical shell of finite length under transient, axisymmetric radial loads of arbitrary axial ...