论文部分内容阅读
一、概述在研究航天运载器的纵向振动稳定性问題的时候,发现其推进剂输送系统的动特性起着重要作用。因此确定运载器推进剂输送系统的动特性,特别是确定其一阶自振频率,是我们首先关心的问题。然而在许多关于管道流体的动力学计算中,都将管道自身做为固定不动处理,这对于工业上及民用输水、输油管的计算来说是正确的。但是用于推进剂输送系统就会产生很大的误差,以致导出错误的结论。其原因是(1)推进剂输送管是通过各种弹性支撑系统固定在运载器壳体
I. Overview In studying the longitudinal vibration stability of the space vehicle, it is found that the dynamic characteristics of the propellant delivery system play an important role. Therefore, it is our first concern to determine the dynamic characteristics of the carrier propellant delivery system, especially the first order natural frequency. However, in many dynamic calculations of pipeline fluids, the pipeline itself is treated as a fixed one, which is correct for industrial and civil water and oil pipeline calculations. However, the use of propellant systems can produce significant errors that lead to erroneous conclusions. The reason is that (1) the propellant delivery pipe is fixed to the carrier housing by various elastic supporting systems