| Complete combustible case is a new technology and useful to improve the gun weapon efficiency. The application of complete combustible case technology in rapid automatic gun is constrained by the self-ignition of the case. In response to this question, taken 30mm automatic gun as research object, the simplified model of complete combustible case is built for the interior ballistics computition. The pressure and temperature of the gas are caculated by the interior ballistics program. Use the Mamohtob's empirical formula to solve the convective heat transfer coefficient of the propellant gas. Use the FEM software (ANSYS) to calculate the temperature and stress changes in single and continuous shooting.The main work of the thesis includes: solve the temperature and stress changes of different points in the barrel wall in single and continuous shooting, solve the temperature and stress changes in different shooting-frequency (500-1200 per a second), solve the temperature changes when the complete combustible cartridge in different thickness and solve the temperature and stress changes when the complete combustible catridge in different burning rate constant.The conclusion of this paper has significances to barrel design and using of complete combustible case. |
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