Optimization of critical speed of double spools with reverse rotation

Under the requirement of high speed, high pressure ratio and high thrust weight ratio, more and more aircraft engines adopt counter rotating technology. In this model, the F135 engine is used to research the dynamic characteristics of a dual rotor system with four supports supported by an intermedia...

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Bibliographic Details
Published inVibroengineering Procedia Vol. 20; pp. 295 - 300
Main Authors Shi, Ze-gao, Luo, Gui-huo, Wang, Fei
Format Journal Article
LanguageEnglish
Published 19.10.2018
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Summary:Under the requirement of high speed, high pressure ratio and high thrust weight ratio, more and more aircraft engines adopt counter rotating technology. In this model, the F135 engine is used to research the dynamic characteristics of a dual rotor system with four supports supported by an intermediary. In this paper, the critical speed of the system is solved by the direct method. Compared with the Campell diagram, the eigenvalue problem of the required solution is greatly reduced. The critical speed is optimized by using genetic algorithm. Moreover, when the constraint of frequency forbidden zone is more severe, the elitist preserving genetic algorithm is used, which greatly reduces the required convergence algebra.
ISSN:2345-0533
2538-8479
DOI:10.21595/vp.2018.20297