The duct which usually transmits high-temperature and high-pressure fluid is important part connecting accessory and chamber to aero-engine. It is significance benefit to reduce costs and risks during engine development to study vibration characteristics and optimizing design of ducts during design process. The influence factors including tube diameter, wall thickness, bending radius, corner angle, span and support stiffness of the duct natural frequency and the sensitivity of duct natural frequency to each theses factor have been researched based on theoretical analysis and ANSYS software in the paper. The optimization of adjusted vibration frequency is also studied with an example that an engine duct has the problem of excessive vibration stress. The results show that the vibration stress can be significantly reduced by adjusting duct span to increased natural frequency.
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刘鹏飞,黄鑫,韩涛. 航空发动机导管振动影响因素[J]. 科学技术与工程, 2022, 22(7): 2930-2936. Liu Pengfei, Huang Xin, Han Tao. Research on Influence Factor of Vibration to Aero-engine Duct[J]. Science Technology and Engineering,2022,22(7):2930-2936.