一种新的Whipple防护结构弹道极限方程准确率分析

文章提出一种新的Whipple防护结构弹道极限方程,对之进行了准确率分析,并与NASA约翰逊空间中心最新的Christiansen方程进行了对比。结果显示:新方程对国内外大量试验数据的预测准确率达到了78%,而Christiansen方程的预测准确率为72%。对于国内200多次超高速碰撞试验数据,新方程预测准确率为78%,而Christiansen方程仅为61%。可见,文章所提出的新方程对国内外材料具有高准确率和普适性,能够满足工程需要。该方程有效克服了国外有关弹道极限方程预测准确率低及通用性不强等缺点,可为我国空间站的M/OD撞击风险评估和防护设计提供技术支持及保障。

Accuracy analysis of a new Whipple shield ballistic limit equations

This paper presents an accuracy analysis for a new ballistic limit equation（BLE） developed by our group for Whipple shield.The results are compared with those based on the newest Christiansen BLE developed by NASA＇s Johnson Space Center.It is shown that the accuracy of our new BLE reaches 78% in predicting a large number of domestic and foreign HVI tests,while with the NASA＇s BLE the accuracy reaches only 72%.Especially for more than 200 domestic tests,the accuracies are 78% and 61%,respectively.Therefore,our new BLE enjoys high accuracy and universal applicability for domestic and foreign materials,and can meet the requirements in engineering applications.Our new BLE effectively improves the accuracy and overcomes the compatibility problem of the NASA＇s BLE,and can provide a technical support for engineers in designing shields and conducting risk assessment for China＇s future space stations.