二维码(扫一下试试看!) | 数字图像相关技术在多孔气凝胶基复合材料弹性力学常数识别中的应用 | Identification of a Set of Elastic Parameters in 2D Plain Woven Aerogel-Based Matrix Composites Using Mixed Numerical-Experimental Method | 投稿时间:2019-08-25 | DOI:10.15918/j.tbit1001-0645.2019.218 | 中文关键词:多孔气凝胶基复合材料数字图像相关技术有限元模型修正参数识别L-M非线性最小二乘优化 | English Keywords:aerogel-based matrix compositesdigital image correlation technologyfinite element model updatingparameter identificationL-M nonlinear least-square optimization | 基金项目:国家自然科学基金面上项目(11472043);国家重大专项资助课题 | | 摘要点击次数:1709 | 全文下载次数:2181 | 中文摘要: | 采用数字图像相关技术(digital image correlation,DIC)结合有限元模型修正技术(FEMU),通过2维编织高铝纤维增强多孔气凝胶基复合材料正轴及偏轴拉伸实验,同时识别获得了材料面内多个工程弹性常数.通过力学实验结合有限元数值虚拟实验,研究了识别过程中目标函数构成、优化方法、参数初值、位移场随机误差水平对识别结果和效率的影响.研究表明针对2维编织多孔气凝胶基复合材料,选取DIC实测位移和有限元数值计算位移的方差作为目标函数,通过L-M非线性最小二乘优化方法,计算参数敏感度矩阵,可同时识别获得多个加载面内材料力学性能参数,识别效率高,识别过程对参数初值、位移场随机误差水平不敏感,鲁棒性好. | English Summary: | Using digital image correlation technology (DIC) and finite element model correction technique (FEMU), multiple mechanical engineering constants in the two-dimensional woven high aluminum fiber reinforced porous aerogel matrix composites were identified through on-axis and off-axis tensile tests. The effects of objective function construction, optimization method, initial value of parameter and random error in the measured displacement field on the identifying results and efficiency were investigated by mechanical experiments and finite-element-based numerical virtual experiments. The results show that, for two-dimensional woven porous aerogel matrix composites, when the variance of the DIC measured displacement and finite element calculated displacement is chosen as the objective function and the L-M nonlinear least-square optimization method is used to calculate the sensitivity matrix, the multiple mechanical properties in the loading surface can be identified simultaneously with high efficiency. The proposed method is insensitive to the differences in initial values of material constitutive parameters and random error in the DIC displacement measurement and has strong robustness. | 查看全文查看/发表评论下载PDF阅读器 | |
胡国良,易锋,张佳伟,喻理梵.基于DOE及RSM的单线圈磁流变阻尼器优化设计及动力性能分析[J].北京理工大学学报(自然科学版),2020,40(11):1150~1160.HUGuo-liang,YIFeng,ZHANGJia-wei,YULi-fan.OptimalDesignandDynami ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21倪俊,姜旭,熊周兵,周波.无人车大数据与云控制技术综述[J].北京理工大学学报(自然科学版),2021,41(1):1~8.NIJun,JIANGXu,XIONGZhoubing,ZHOUBo.OverviewofBigDataandCloudControlTechnologiesintheFiel ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21.北京理工大学学报2020年总目次(第40卷)[J].北京理工大学学报(自然科学版),2020,40(12):1369~1386..[J].TransactionsofBeijingInstituteofTechnology,2020,40(12):1369-1386.二维码(扫一下试试看!)北京理 ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21赵瑛峰,刘检华,马江涛,武林林,成勋.面向MCNP程序的三维模型前处理技术研究[J].北京理工大学学报(自然科学版),2021,41(3):237~244.ZHAOYingfeng,LIUJianhua,MAJiangtao,WULinlin,CHENGXun.Studyon3DModelPretr ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21谭博文,段枫,王文广.基于技术风险的方案优化与评估方法的研究[J].北京理工大学学报(自然科学版),2021,41(4):425~431.TANBowen,DUANFeng,WANGWenguang.ResearchonSchemeOptimizationandEvaluationMethodBas ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21袁志扬,朱煜,成荣,张鸣,刘剑,仲凯.高精度平面光栅尺测量系统减振技术研究[J].北京理工大学学报(自然科学版),2021,41(5):494~500.YUANZhiyang,ZHUYu,CHENGRong,ZHANGMing,LIUJian,ZHONGKai.ResearchonVibration ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21徐豫新,蔡子雷,吴巍,赵鹏铎,乔治军.弹药毁伤效能评估技术研究现状与发展趋势[J].北京理工大学学报(自然科学版),2021,41(6):569~578.XUYuxin,CAIZilei,WUWei,ZHAOPengduo,QIAOZhijun.CurrentResearchandDevelopme ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21孙一博,孟秀云,邱文杰.基于表格形气动数据的滑翔飞行器轨迹优化[J].北京理工大学学报(自然科学版),2021,41(8):820~829,839.SUNYibo,MENGXiuyun,QIUWenjie.TrajectoryOptimizationofGlideVehiclesBasedonTab ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21王建中,游玉,王鹤.变结构陆空机器人自主跨域越障技术研究[J].北京理工大学学报(自然科学版),2021,41(8):840~846.WANGJianzhong,YOUYu,WANGHe.AutonomousCross-DomainObstacleNegotiationResearchofaVari ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21张宏伟,达新宇,胡航,倪磊,潘钰.基于协作频谱感知的多无人机通信网络谱效优化研究[J].北京理工大学学报(自然科学版),2021,41(8):830~839.ZHANGHongwei,DAXinyu,HUHang,NILei,PANYu.SpectrumEfficiencyOptimizationo ... 北京理工大学科研学术 本站小编 Free考研考试 2021-12-21
| |