推进系统参数变化对液体火箭纵向振动响应的影响分析

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (12) : 189-194.

论文

唐冶 1，方勃 1 ，张业伟 2,3 ，谭立军 1，于子文 4

作者信息 +

Influential Analysis of Parameters Variation of Propulsion System on Longitudinal Vibration Response in Liquid Rockets

Tang Ye 1 Fang Bo 1 Zhang Yewei 2, 3 Tan Lijun1 Yu Ziwen 4

Author information +

文章历史 +

摘要

为了优化液体火箭推进系统，避免POGO振动引起液体火箭低频振动环境恶化对火箭飞行过程的不利影响，建立了液体火箭POGO振动系统的动力学模型，利用动态灵敏度技术，提出了液体火箭纵向振动响应对推进系统参数的灵敏度时域分析模型。通过数值仿真，得到了推进系统流体惯性、阻力和刚度参数以及泵的动态增益变化对液体火箭纵向振动响应的影响规律。研究结果表明，液体火箭纵向振动响应对流体惯性和阻力参数的敏感程度比流体刚度参数明显大，泵动态增益的变化对液体火箭纵向振动响应的影响最大，泵前短管的流体刚度变化对液体火箭纵向振动响应的影响最小。为减小液体火箭纵向振动，进一步研究POGO振动特性提供参考。

Abstract

To optimize the propulsion system in liquid rockets, avoid the low frequency vibration environment deterioration of liquid rockets which is caused by POGO vibration has disadvantage effect on the flight course of rocket system, the dynamic model of POGO vibration system in liquid rockets is established, the model of sensitivity analysis that longitudinal vibration response in liquid rockets (LVRILR) with respect to parameters of propulsion system is proposed in the time domain based on the dynamic sensitivity technique. Through numerical calculation, the laws that the inertial parameters variation of fluid, the drag parameters variation of fluid, the stiffness parameters variation of fluid and the dynamic gain variation of pump for propulsion system have an important effect on LVRILR are obtained. The results obtained show the sensitive extent of LVRILR with respect to the inertial parameters of fluid and the drag parameters of fluid is sharply greater than the stiffness parameters of fluid, the influence that the dynamic gain variation of pump has on LVRILR is the maximum, and the influence that the variation of fluid stiffness for the short pipeline which is on pump front has on LVRILR is the minimum. This provides a reference for longitudinal vibration in liquid rockets is reduced and the characteristics of POGO vibration are further researched.

导出引用

唐冶 1，方勃 1,张业伟 2,3,谭立军 1，于子文 4. 推进系统参数变化对液体火箭纵向振动响应的影响分析[J]. 振动与冲击, 2015, 34(12): 189-194

Tang Ye 1 Fang Bo 1 Zhang Yewei 2, 3 Tan Lijun1 Yu Ziwen 4 . Influential Analysis of Parameters Variation of Propulsion System on Longitudinal Vibration Response in Liquid Rockets[J]. Journal of Vibration and Shock, 2015, 34(12): 189-194

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