某型号火箭发动机在地面试车的同时,进行振动测量,发现各个方向不同程度存在所谓的超低频振动现象。本文在分析和计算发动机纵向振动的基础上,解释了上述现象,得出结论:火箭发动机存在低频振动。另外在对该系列发动机测振进行比较的基础上,分析了影响发动机振动的各种因素。 A model rocket engine in the ground test at the same time, the vibration measurement found in varying degrees in all directions so-called ultra-low frequency vibration. Based on the analysis and calculation of the longitudinal vibration of the engine, this paper explains the above phenomenon and concludes that there is low-frequency vibration in the rocket engine. In addition, based on the comparison of vibration measurement of the series of engines, various factors that affect the vibration of the engine are analyzed.