Estimation of Velocity Distribution of Fragmenting Warheads Using a Modified Gurney Method

摘要

The Gurney energy method, an analytical method with which to compute fragment velocity distributions for continuous casing warheads, is reviewed and a method to model velocity losses due to end effects on cylindrical charges and end projector type warheads is presented. The Taylor formula, which estimates the angle of projection of the fragments, and a modified Taylor formula, which gives better estimates, are also presented. The method is extended for use with casings made of pre-formed fragments. Finally, four conceptual preliminary designs, based on information acquired in the project, are investigated. The modifications made to the equations provide improved results and the examples confirm that the modified Gurney method is a quick, inexpensive tool for use in preliminary warhead design. (Author)