气驱油源充液状态下随机振动分析及隔振器位置优化布局研究

Random Vibration Analysis and Optimal Layout Study of Vibration Iso-Lator Position of Pneudralic Oil Source under Liquid Filling Condition

气驱油源是火箭发射系统中的关键设备之一,其工作过程中常常受到严酷的振动激励,为了确保气驱油源工作过程中的安全性,有必要对其在振动环境下的响应进行分析,进而采取必要的隔振措施。本文基于有限元数值分析方法,建立了气驱油源在充液状态下的动力学仿真分析模型,在基于实测基础激励分析其振动响应的基础上,得到隔振措施的设计方案。通过调整隔振器布置形心与气驱油源重心处于同一竖直平面,设计了另外三种隔振器布置方案,以底座三向加速度RMS值,油测球阀三向加速度RMS值,管道三向加速度RMS值以及管道应力作为评价准则,利用层次分析法分析数据得到了相对最优的隔振器布置方案,进一步提高了系统的隔振性能。

Pneudralic Oil Source is one of the key equipment in the rocket launching system, which is often subjected to severe vibration excitation during the working process. To ensure the safety of Pneu-dralic Oil Source during the working process, it is necessary to analyze its response under the vi-bration environment, and then take the necessary vibration isolation measures. Using finite ele-ment analysis, we establish a simulation model for the Pneudralic Oil Source dynamics in liq-uid-filled state. Through vibration response analysis of measured base excitation, we obtain vibra-tion isolation measures. By adjusting the isolator and oil source centers of gravity to the same ver-tical plane, we design three isolation schemes to minimize acceleration RMS values in three direc-tions of the base, valve, and pipeline. Using RMS of three-directional accelerations of the base, valve, and pipeline, as well as pipeline stress as evaluation criteria, we analyzed the data by the analytical hierarchy process to obtain the optimal isolator arrangement scheme. This further improved the vibration isolation performance of the system.