摘要
综合考虑对接速度和对接角度在航天器对接过程中对锥杆式对接机构动态特性的影响,采用ANSYS/LS-DYNA软件建立了锥杆式对接机构多体接触有限元模型。基于显式动力学有限元算法,采用全积分单元进行沙漏控制,通过调整单元密度和采用混合时间积分算法提高计算速度,对锥杆式对接机构进行动态特性分析,得出了对接机构在对接过程中的动态响应及结构体的应力波动。分析结果表明:对接机构的动态特性参数会随对接速度及对接角度的增加呈现递增趋势;锥杆式对接机构的锥孔尺寸会引起对接过程中机构动态特性发生显著变化。
ement method, a fully integration algorithm was adopted to control hourglass, and calculation was accelerated by setting density of element and adopting mixed time integral arithmetic. The dynamic characteristics for coneperch docking mechanism was analyzed, which obtains the dynamic response of docking mechanisms and the stress fluctu ation of structures in the docking process. According to the analysis result, the parameters of dynamic characteristics increases with the increasing of docking speed and angles, and it is possible for significant change of dynamic char acteristics bein caused bv the hole size.
出处
《机械科学与技术》
CSCD
北大核心
2014年第2期303-308,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51275423)
教育部高等学校博士学科点专项科研基金项目(20126102110019)
高等学校学科创新引智计划项目(B13044)资助
关键词
航天器
动态响应
动力学
有限元法
acceleration
algorithms
calculations
computer software
docking
dynamic response
dynamics
fi- nite element method
integration
mathematical models
matrix algebra
space rendezvous
spacecraft
