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采用同心筒式发射装置发射导弹时,弹底会受到附加弹射力的作用,其值主要取决于排气狭缝宽度、增力装置、导流锥等因素.利用动量方程积分形式推导出附加弹射力的理论公式,分析各种因素对附加弹射力的影响,并利用数值模拟技术进行验证.结果表明:筒底所承受冲击力与弹底所受的附加弹射力呈正相关;减小内外筒间缝隙可提高弹底所受的附加弹射力;加导流锥能降低筒底所受的冲击力.导流锥母线越光滑,筒底所受到的冲击力就越小;增加导流锥后,燃气流动达到稳定状态的时间与无导流锥时所需的时间近似于相等.
When a concentric cartridge launcher is used to launch a missile, the bottom of the bomb will be subjected to additional ejection force, and its value mainly depends on factors such as the width of the exhaust slit, the force increasing device, the guide cone, etc. The additional ejection Force theoretical formula to analyze the impact of various factors on the additional ejection force, and the use of numerical simulation technology to verify the results show that: the bottom of the cylinder to bear the impact and the bomb at the end of the additional ejection force was positively correlated; reduce the inner and outer cylinder The gap can increase the additional ejection force suffered by the bottom of the bomb; plus the diversion cone can reduce the impact of the bottom of the cylinder. The more smooth the diversion cone bus, the bottom of the cylinder by the impact of the smaller; The time it takes for the gas flow to reach a steady state is approximately the same as the time required for no diversion cone.