| JIANG Kai，CHEN Wei，HAN Jia-qi，LIU Lu-lu，ZHAO Zhen-hua，LUO Gang.Explicit-implicit Simulation of Engine Response Under Bird Impact[J].航空发动机,2023,49(1):109-114 |
| Explicit-implicit Simulation of Engine Response Under Bird Impact |
| DOI： |
| Key Words:bird strike engineresponse sudden high-energyload long-term analysis load transfer axiscentertrajectory aeroengine |
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| Abstract:In order to study the impact of bird strike as a typical sudden high-energy load on the safety of aeroengine key load-bearing
components and engine structure, a large bypass ratio turbofan engine was taken as the research object. Aiming at the characteristics of dif?
ferent dynamic response stages of bird strike, using modeling software UG and commercial simulation software Hypermesh and LS-DYNA,
a set of dynamic response analysis model of the whole engine under sudden high-energy load like bird strike was developed, the explicit or
implicit long-term analysis process and method were established，and the advantages and disadvantages of different analysis methods for
studying the engine response under sudden high-energy load was compared. Their superiority of different methods in the study of engine re?
sponse laws in different dynamic response stages after a bird strike were verified. The results show that the influence of bird impact on aero?
engine is mainly reflected in the blade deformation in the impact stage and the influence of unbalanced load in the post impact response
stage on the load-bearing components, and the combination of explicit and implicit analysis is comparatively effective. The research result
is a valuable reference for the study of whole engine dynamic response law of the in different dynamic stages under other sudden high-ener?
gy loads. |
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