摘要
应用有限元理论中的节点力公式并对其进行矢量合成,解决了复杂空间结构计算规模较大无法获取截面动载荷的问题。该方法基于截面单元刚度矩阵和节点位移列阵的物理信息,具有不改变截面连接刚度、求解速度快的优点,对静力学和动力学载荷提取均有较好的求解精度,其正确性已通过典型梁、壳、体单元模型算例验证。该方法原理清晰,具有普适性,后续可推广到运载火箭和空间飞行器截面载荷计算工作中。另外还针对不同计算规模给出可行有效的载荷提取方案。
A quick method of internal loads calculation is applied to solve large-scale computing problem in complex space system structural design. It is based on finite element theory, where the interface mechanical information such as element rigidity matrix and displacement vector, is included as a main factor, which has the benefit of maintaining interface rigidity, obtaining high precision results and efficient computation. It is proved to be suitable for static and dynamical internal loads calculation for complex spacecraft structural design. Feasible schemes for different computing scales are given.
出处
《强度与环境》
2017年第6期15-22,共8页
Structure & Environment Engineering
基金
国家高技术研究发展计划资助项目(2015AA7021076)
关键词
有限元理论
载荷提取
关注截面
截面刚度
大计算规模
finite element theory
internal loads calculation
section with concern
interface rigidity
large-scale computing
