摘要
防护结构的撞击极限是空间防护领域的重要研究内容。基于对理想弹塑性薄板的分析,得到了双层板结构的撞击极限方程。所得方程适用于球形弹丸超高速正撞击双层板结构的情况,分析时采用了Rayleigh-Ritz法及Tresca屈服准则。为验证方程的有效性,对实验进行了预报分析,并且与已有的经验方程的撞击极限曲线进行了对比。结果发现,方程预测结果的准确率为80%,且所得的撞击极限曲线与已有的经验方程曲线吻合得很好。
The potential threat from meteoroids and orbital debris particles impacting on pressurized spacecraft prompted a study of ballistic limit analysis.The paper presents a new analytical ballistic limit equation for sphere projectiles normal impacting on thin plates.This equation applies to cases of hypervelocity impacts on dual wall structures.The developed equation is based on theoretical analysis of a perfectly elastic plastic plate.The Rayleigh-Ritz method was used.To test the validity,we predicted 30 tests by the equation.It was found that there are 24 predictions corresponding to the tests.Curve is presented for the critical projectile diameter versus the projectile velocity.The curve is in good agreement with curves that have been developed by Christiansen.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2007年第3期311-315,共5页
Chinese Journal of High Pressure Physics
关键词
空间防护
解析方法
撞击极限方程
超高速碰撞
shield structure
analytical method
ballistic limit equation
hypervelocity impact
