论文部分内容阅读
为分析撞击极限方程对蜂窝夹层结构的穿透特性的预测能力,调研得到了3类撞击极限方程的表达形式和等效方法,以及131个采用碳纤维复合材料(CFRP)面板的蜂窝夹层板结构的试验数据,并对撞击极限方程的预测能力进行了比较计算。结果发现,MET方程对他源数据的四种(未失效、失效、总体以及安全)预测率均大于80%,进行在轨航天器结构的失效分析时可优先选用;SRL方程对本源数据的安全预测率达到了100%,在他源数据上的安全预测率也很高,适用于航天器防护结构设计。探讨了撞击极限方程中的系数、速度分界值的优化思路,以提高撞击极限方程的预测率。
In order to analyze the predicting ability of the impact limit equation to the penetration characteristics of the honeycomb sandwich structure, the expressions and equivalent methods of the three types of impact limit equations were obtained and 131 sandwich honeycomb sandwich panels with carbon fiber composite (CFRP) panels The experimental data are compared with the prediction ability of the impact limit equation. The results show that the forecasting rate of MET equation for his source data is more than 80% (failure, failure, overall and safety), and the MET equation can be used preferentially in failure analysis of orbiting spacecraft structures. The safety of SRL equation for the source data The forecasting rate has reached 100%, and the safety prediction rate on his source data is also very high, which is suitable for the design of the spacecraft protection structure. The optimization method of coefficient and velocity cutoff in the impact limit equation is discussed in order to improve the prediction rate of the impact limit equation.