航天器火工作动装置流固耦合过程的数值研究

摘要

The pyrotechnically actuated mechanisms equipped on spacecraft are used for achieving key procedures and missions,and need to satisfy very high reliability and security requirements. This paper focused on the working pro-cess of pyrotechnically actuated mechanism with complex structure,the dynamics model considering nonlinear fluid-struc-ture interaction has been established and solved by using finite volume method and finite element method under two differ-ent load working conditions. The change of variables in fluid field and output performance of pyrotechnically actuated mechanism has been obtained. The numerical simulation results showed the availability of numerical simulation on pyro-technically actuated mechanism,and the output performance of pyrotechnically actuated mechanism was related to the loads.%航天器上配备的火工作动装置用于完成关键程序动作与任务，具有很高的可靠性与安全性要求。针对复杂结构火工作动装置的工作过程，建立非线性流固耦合动力学模型，在推力与拉力负载两种工况下，采用有限体积法、有限元法进行数值计算，得到火工作动装置工作过程中流场变化规律与输出性能。数值模拟结果表明，航天器火工作动装置流固耦合过程的数值分析能够模拟其工作过程，火工作动装置的负载对输出性能有较大影响。