RASCAL In-Bore Dynamic Analysis of the Task B and Task C Electromagnetic Railguns

摘要

Previous RASCAL in-bore gun dynamics analyses 90-mm railguns have shown hightransverse accelerations can be expected because of anomalies in the bore straightness. A request was made for similar analyses to be made for the Task B and Task C 90-mm railguns, with the Sabot Launched Electromagnetic Gun KE (SLEKE) II projectile design. Results of the RASCAL analyses showed the importance of matching the contact stiffness of the rear and front bore riders of the SLEKE II designs. Numerous cases were run to show the effects of variations in contact stiffness. Mismatched contact stiffness resulted in elevated transverse accelerations at the less stiff of the two bore riding contacts. Comparisons of the results of this work are made against previous RASCAL analyses. These results verify the effect a kink in the bore centerline profile has on the projectile's in-bore response.