摘要
为了研究非对称大膨胀比喷管试验台的喷管气动性能,准确地测量矢量喷管的六分量气动力,该文依据喷管试验台的测试要求,提出一种新颖的基于T型梁S弯变形的框架式整体六分量天平。通过分析天平的各元微应变与安装结构,设计并制造出天平,依据静态标定获得天平的工作系数矩阵。最后,用有限元方法验证设计结果。研究表明:天平的结构简单,精、准度高,满足试验台的六分量力测量要求。
To study the dynamic performance of a big expansion ratio nozzle with asymmetric structure,and measure the six-component dynamic force accurately for the thrust vectoring,a novel integrated six-component force balance is introduced in the paper based on S-bend deformation of T-beams.By analyzing the measuring microstrain and the assembled structure of the test-bed,the balance is designed and fabricated.The static calibration is employed to obtain the matrix of working coefficients for the balance and the finite element method is included to demonstrate the presented design method.Research result shows that the presented balance has a simple structure and high precision and accuracy,which can meet the demands of a six-component force measurement for the big expansion ratio nozzle test-beds.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第4期547-551,共5页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(50876042)
南京航空航天大学青年科技创新基金(56V1029)
江苏省数字化制造重点实验室基金(HGDML-0905)
关键词
大膨胀比
喷管试验台
六分量天平
静态标定
有限元方法
big expansion ratios
nozzle test-beds
six-component balances
static calibration
finite element method
