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应用三维粘弹性有限元分析方法,分析了某固体火箭发动机药柱在低温载荷作用下的应力应变场,讨论了前伞盘曲面形式、宽度和深度对该部位最大Von Mises应变值的影响。在此基础上,通过调整前伞盘顶端双圆弧曲面结构的半径比,在基本不减少装药量的前提下,有效降低了该处最大Von Mises应变值,并初步确定了最佳半径比的范围,所得结论可为固体火箭发动机装药设计提供定量参考。
The three-dimensional viscoelastic finite element analysis method was used to analyze the stress-strain field of a solid rocket motor grain under low temperature loading. The influence of the form, width and depth of the former arch on the maximum Von Mises strain was discussed. On this basis, by adjusting the radius ratio of the double arc surface structure at the top of the forepants, the maximum Von Mises strain value is effectively reduced under the premise of not reducing the charge amount, and the optimal Von Mises strain ratio The conclusion can provide a quantitative reference for the design of solid rocket motor charge.