侵彻条件下岩石类材料RHT模型参数敏感性分析  

Sensitivity analysis of RHT model parameters for rock materials under penetrating condition

作　　者：聂铮玥 彭永[1] 陈荣 蔡镇清 李付刚 NIE Zhengyue;PENG Yong;CHEN Rong;CAI Zhenqing;LI Fugang(College of Liberal Arts and Sciences,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学文理学院,长沙410073

出　　处：《振动与冲击》2021年第14期108-116,共9页Journal of Vibration and Shock

基　　金：国家自然科研基金项目(11002162)。

摘　　要：材料模型的参数敏感性分析对于简化材料参数确定及精确仿真计算结果具有重要意义。针对弹体侵彻半无限厚岩石靶体问题,考虑多种类型岩石的材料参数变化范围及参数间的非独立性,利用优化拉丁超立方设计(Opt LHD)算法设计了RHT模型参数计算矩阵并开展了参数敏感性分析,克服了以往研究中常采用单因素变量法进行分析的不足。分别以侵彻深度、弹体质量损失率及靶体损伤度为评价指标,结合355个有效数值仿真结果,分析了参数间的交互效应。结果表明,参数间存在交互效应,但总体参数组合对三类评价指标的交互效应均不显著,因此,进一步对参数进行了主效应分析。为了定量评价参数敏感性差异,通过建立参数与评价指标间的响应面模型,基于多元二次回归模型计算了参数贡献率,进一步得到了对于不同评价指标的材料参数敏感性排序结果。The sensitivity analysis of material model parameters is very important for simplifying the determination of material parameters and acquisition of accurate simulation results.For the problem of projectile penetrating into semi-infinite rock target,considering the variation range and the non-independence of rock material parameters,the optimal Latin hypercube design(Opt LHD)algorithm was used to design the parameter calculation matrix,which overcomes the shortcomings of monofactor analysis method.Taking penetration depth,projectile mass loss rate and target damage degree as evaluation indexes,the interaction effects between parameters were analyzed based on 355 effective numerical simulation results.The results show that there are interaction effects among the parameters,but the interaction effects of the overall parameter combination on the three types of evaluation indicators are not significant,therefore,the main effects of parameters were further analyzed.In order to quantitatively evaluate the sensitivity difference between parameters,the parameters contribution rate were calculated by establishing response surface models between the parameters and the evaluation indexes,and the material parameter sensitivity ranking results for different evaluation indexes were further obtained.

关 键 词：RHT模型 侵彻问题 ISIGHT软件 优化拉丁超立方设计(Opt LHD) 参数敏感性 

分 类 号：O347.1[理学—固体力学]