Large deflection response of thin tubes to impact

The dynamic response of cylindrical shells that are hit by missiles is important for safe design of pipes and pressure vessels in nuclear power plants. Since 1983, a calculation using Dyna 3D FEM code and a series of experimental studies have been done by Winfrith, United Kingdom Atomic Energy Authority. However, some simplified analytical methods would be useful during the preliminary stage of design. The primary objective of the present study is to develop a simple but reliable theoretical model for predicting the response history and the final deformation of shells with reasonable accuracy and nominal computing costs. After reviewing previous analyses for the dynamic response of cylindrical shells, this report describes the development of models for cylindrical shells subjected to normal or oblique impact by rigid missiles. The translation of parameters from cylindrical shells to a beam-on-foundation model is described.