The structure thermal response characteristics on typical meridian of the reentry warhead with fixed flying attack-angle and the effects of the roll attitude change time on the structure thermal response on typical meridian plane were studied by the coupling calculation method of the aerodynamic heating environment and structure thermal response.The heat-shield thickness optimization method considering the effect of roll attitude change times was built,and the heat-shield thickness of the warhead was optimized based on this optimization method.The effect of the body rolling numbers on the optimization results was researched.The results show that the aerodynamic heating on the shell surface is more reasonable,and the maximum temperature rise of the inner surface is effectively reduced by changing the roll attitude in the forepart of the flying trajectory.When the maximum temperature rise of the inner surface is 25 K,the thickness of heat-shield can be reduced by 0.725 mm(5.4%)compared with the condition without rolling movement.The heat-shield thickness can be effectively reduced by the joint optimization with the roll attitude change time.Compared with single rolling movement change,the decrease extent of heat-shield thickness increases by 1.9%considering twice rolling movement.The number of the rolling movement change has a small effect on optimization result.
aerodynamic heatingangle of attackroll attitude changestructure thermal responseoptimization of heat-shield thickness
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