液氧煤油发动机伺服机构回路频率提升研究

作     者：WANG Ke HE Jiang LI Miaoting NIE Jiawei WANG Ke;HE Jiang;LI Miaoting;NIE Jiawei

作者机构：Xi’an Aerospace Propulsion InstituteXi’an 710100 

出 版 物：《Aerospace China》 (中国航天（英文版）)

年 卷 期：2023年第24卷第3期

页      面：18-25页

学科分类：0821[工学-纺织科学与工程] 08[工学] 

主　　题：LOX/kerosene engine engine-servo loop low-order frequency characteristics modal analysis 

摘      要：In order to suppress the low-frequency resonance phenomenon in the engine-servo loop during the development of the 1200 kN LOX/kerosene engine,the inherent characteristics of the loop were analyzed by finite element simulation and *** on the method of finite element simulation,the modal analysis of the engine-servo loop was carried out,and the finite element model was modified according to the results of modal test,so that the results of finite element simulation were in agreement with the results of the modal *** this basis,various sensitive factors were analyzed with the finite element *** results show that the stiffness of the bearing and gimbal mount as well as the stiffness and dip angle of the pull rod have great influence on the natural frequency of the *** on these conclusions,the structure of the engine was *** modal analysis of the improved single-engine and double-engine structures was carried out using numerical simulation and modal *** results show that the low-order frequency of the improved single-engine and double-engine structures was significantly improved,and the effectiveness of the improved scheme was verified,which provides a solution to improve the low-order natural frequency in the engine-servo loop.