多孔火药温度场计算及热应力分析

he heat conduction and mechanics characteristic of multi-perforated propellant has important influence to its combustion property. Utilizing the finite-difference method, the multi-perforated propellant model whose boundary conditions are irregular is meshed by non-structural grid, and then the distribution of temperature field and combustion property of seven-perforated propellant is gained by segregating boundary conditions. Based on the calculation, considering that the direct stress is the main form for the thermal stress of propellant, the distribution of radial and axial stress is analyzed, and the theoretical foundation for combustion and crushing mechanism of multi-perforated propellant is also supplied.