1497. Missile Body Weight Prediction
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Paper
Abstract
Vought has developed a technique for predicting missile body weight which combines an optimum shell analyzed for applied loads and material usage with weight penalties added for specific design features. The optimum shell is sized for buckling within a given section. Cylindrical and conical body sections are analyzed. Allowable buckling stress methods are taken from NASA CR912 ‘Shell Analysis Manual.’ I Applied stress level s are computed using standard analysis expressions. Stress ratios are computed and the section is sized for the 1imiting value of the 1oading conditions considered. This rough sizing is further refined by consideration of combined loading effects. Penalty weights computed using a combination of analytical and empirical techniques include: – Weight penalty for minimum gauge – Weight penalty for handling – Weight penalty for joints – Pressure bulkhead weight – Wing and tail attachment – Weight penalty for access doors – Weight penalty for air launch features – Boat tail close out ring – Fastener and miscellaneous a1lowance. The method presented in this paper has been expanded, adapted for computer execution and incorporated into Vought’s Missi1e Integrated Design and Analysis System, MIDAS.
