摘要
剪式铰杆系结构在宇航领域有着广泛的应用,众多学者进行了深入研究。对剪式铰结构的展开过程分析非常重要,传统的分析方法是采用多体动力学。研究基于向量式有限元法(VFIFE)基本理论,分别建立剪式铰结构的柔性杆模型和刚性杆模型。根据强制几何约束,提出剪式铰结构的刚性杆建模方法,并推导内力计算。对柔性杆建模方法,根据位移一致原则,推导内力计算。根据理论模型,针对某一剪式铰杆系结构,进行展开过程模拟,对展开位置误差、展开时间和展开速度进行分析。研究结果表明,刚性杆和柔性杆模型均能顺利模拟展开过程,二者模型计算结果存在微小的误差。柔性杆模型特征点展开速度小于刚性杆模型展开速度,但柔性杆模型展开时间大于刚性杆模型展开时间。
Deployable truss structure with scissors-hinges is widely used in aerospace field,and many scholars have carried out in-depth research.The analysis of the scissors-hinges structure deployment process is very important and the traditional analysis method is multibody dynamics.Based on the basic theory of vector finite element method(VFIFE),the scissors-hinges flexible bar model and the rigid bar model are presented respectively.The rigid bar model is established according to the enforced geometric constraints,and the calculation method of internal force is deduced.According to the principle of consistent displacement,the calculation of internal force is deduced for the flexible bar model.According to the results of theoretical derivation,the process of deployment is simulated for a scissors-hinges structure model,and the position error,time and speed of deployment are analyzed.The results show that both rigid and flexible bar models can simulate the deployment process successfully,and there are small errors in the calculation results of both models.The deployable speed of the particle of the flexible bar model is less than that of the rigid bar model,but the deployable time of the flexible bar model is longer than that of the rigid bar model.
作者
杨玉龙
刘宇飞
李萌
季京宣
YANG Yulong;LIU Yufei;LI Meng;JI Jingxuan(Zhejiang University,Hangzhou 310058,China;Qian Xuesen Laboratory of Space Technology,China Academy of Space Technology,Beijing 100094,China)
出处
《空间电子技术》
2021年第3期75-79,共5页
Space Electronic Technology
基金
钱学森空间技术实验室种子基金项目,国家自然科学基金(编号:U1637207)。
关键词
可展杆系结构
剪式铰
VFIFE法
建模
deployable truss structure
scissors-hinge
VFIFE method
modeling
