Browsing by Subject "electromagnetic analysis"

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3-D Electromagnetic Analysis of Armatures and Rails for High Launch Energy Applications
(IEEE, 2009-01) Liu, H-P.; Lewis, M.C.
Transient three-dimensional (3-D) electromagnetic analyses have been performed on armatures and rails which are intended to be used for high launch energy applications. Coupled magnetic and thermal diffusions were solved within moving armatures in both square bore and round bore rail launchers. Current, magnetic field, body force and temperature distributions in the armature and rail conductors were predicted and compared. The predicted mechanical and thermal loading outputs can be further used for launcher structural analysis and rail cooling design.
Electromagnetic and Structural Analyses of an Integrated Launch Package
(IEEE, 1999-01) Liu, H-P.; Ting, Y.L.; Zowarka, R.C.; Alexander, A.
In this paper, detailed three-dimensional (3D) transient electromagnetic (EM) analyses with temperature-dependent material properties were performed using a state-of-the-art analysis tool to calculate current densities, body force densities, and temperature distribution in launch package and rail conductors. The body force densities, temperature distribution, and package accelerations generated by the EM model were then provided to a 3D multiple-step nonlinear static structural model for detailed mechanical analyses. The combined 3D EM and structural analyses can be used to accurately predict the EM launching performance and launch package structural integrity. Furthermore, armature optimization and package survivability enhancement can also be achieved with the help of these analyses