The Buckling Numerical Simulation Of The Missile Cabin Simulator Under Intense Laser Irradiation And Mechanical Load

When missile shell is irradiated by intense laser, it will be softened and even melten.which leads to the decrease of the structural hardness of the shell. As a result, structural destabilization may be developed in the shell under the mutual impact of air-actuated load and inertial Using finite element program, we simulate the heating process under laser irradiation in the missile cabin simulator and obtain temperature distribution in the simulator shell. The results indicate that the spatial distribution of laser intensity has notable effect on temperature distribution in the simulator shell.Using finite element program, we simulate the plastic buckling of the simulator shell with a hole, simulating the state when that part of the shell is melten by laser irradiation The results indicate that the joint belt's structural hardness of the simulator shell, and that it requires notable loads to develop overall (not just local) destabilization in the simulator shell even when the hole-in the shell has a field angle up to 120 degree .The buckling of the simulator shell as a result of thermal softening is studied. The results indicate that the axial width of the laser beam has less effect on the critical buckling loads than that of the loop field angle of the laser beam. The plastic buckling behaviors of the simulator shell under two conditions are compared: (a) with a hole melten by certain amount of laser energy; (b) with relatively large area in the shell thermally soften by theb same amount of laser energy. It is found that critical buckling load in condition (b) is larger than that in condition (a), as in condition (b) .the temperature rise in the joint belt and in the nearly shell is not high enough to make the shell notably lose its structural hardness.