固体火箭发动机变截面燃烧室纵向一维声模态特性研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (15) : 71-76.

论文

史晓鸣1，侯凯宇2，刘陆广1，高阳1，夏鹏1，李海东1，李莎莎3，陆丰玮4

作者信息 +

Longitudinal 1D acoustic modal characteristics of variable cross-section combustion chamber in solid rocket motor

SHI Xiaoming1, HOU Kaiyu2, LIU Luguang1, GAO Yang1, XIA Peng1, LI Haidong1，LI Shasha3, LU Fengwei4

Author information +

文章历史 +

摘要

建立了考虑燃烧室截面面积变化的纵向一维声振方程，有限差分数值求解纵向声模态，通过变截面燃烧室模拟试验件声模态试验验证了本文数值方法的准确性。研究结果表明：与等截面工况相比，变截面工况下纵向声模态频率第n阶(n>1)纵向声模态频率fn与 1阶基频f1间倍数关系是；奇数阶振型关于纵向长度的中点不再保持反对称，偶数阶振型关于纵向长度的中点不再保持对称；在燃烧室截面变化最为剧烈的发动机初始工作阶段，纵向声模态分析必须考虑截面变化的影响。
关键词：声模态，变截面，固体火箭发动机，燃烧室，纵向

Abstract

1-D longitudinal acoustic model of solid rocket motor chamber with non-uniform cross-section was founded. Longitudinal acoustic modal of chambers with non-uniform cross-section were solved by finite difference method and validated in respect of accuracy with acoustic modal test of chamber test pieces. Results shown that compared with chambers with uniform cross-section, the multiple between n-th(n>1) and 1st order frequency(fn and f1) of chambers with non-uniform cross-section is ; odd and even order mode shape are not asymmetrical and symmetrical respectively about middle point of longitudinal length; analysis of longitudinal acoustic modal must consider the obviously varying cross-section at the initial working stage of solid rocket motor.
Keywords: acoustic modal，non-uniform cross-section，solid rocket motor，chamber，longitudinal

导出引用

史晓鸣1，侯凯宇2，刘陆广1，高阳1，夏鹏1，李海东1，李莎莎3，陆丰玮4. 固体火箭发动机变截面燃烧室纵向一维声模态特性研究[J]. 振动与冲击, 2022, 41(15): 71-76

SHI Xiaoming1, HOU Kaiyu2, LIU Luguang1, GAO Yang1, XIA Peng1, LI Haidong1，LI Shasha3, LU Fengwei4. Longitudinal 1D acoustic modal characteristics of variable cross-section combustion chamber in solid rocket motor[J]. Journal of Vibration and Shock, 2022, 41(15): 71-76

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