a numerical algorithm for dynamic analysis of missile launchers

the projection strucrure is vibrated by the dynamic effects of the projectile in the inital stahes before seperation. this induces two major results, one is the calculation of stresses obtained decause of bib ration in order to design the launcher and other one which. is bery important, is the determinaion of initial condirions of the nissile prijection at the time of fron the launcher. these conditions are not the same as the static conditions before projection, beacuse of vibration at the time of projection. thereford, these conditions should be determined in order to be accurate in hirring the targer. in thes study, a numerical algorithm based on structural lmpedamce approach (1), (3), (4), (5), (6), (7) is presenred to obtain the appropriate governing equations. finally, a software has been prepared bu whic the displacements of different points on the launcher at various time snd initial conditions of missile at the time of seperction from the latncher can be predicted.