航空科学技术
航空科學技術
항공과학기술
AERONAUTICAL SCIENCE AND TECHNOLOGY
2014年
9期
66-70
,共5页
李颖%王志强%柴象海%侯亮%HOU Liang
李穎%王誌彊%柴象海%侯亮%HOU Liang
리영%왕지강%시상해%후량%HOU Liang
航空发动机%鸟撞%高应变相关%Johnson-cook模型%双线性模型%霍普金森杆
航空髮動機%鳥撞%高應變相關%Johnson-cook模型%雙線性模型%霍普金森桿
항공발동궤%조당%고응변상관%Johnson-cook모형%쌍선성모형%곽보금삼간
aero engine%bird strike%strainrate dependency%Johnson-cook model%bi-linear model%hopkinson bar
本文针对典型航空发动机应变率相关材料,阐述了常用的Johnson-cook模型和双线性材料模型及其参数标定方法,并将这两个材料模型分别应用于风扇叶片鸟撞试验的仿真分析,对试验结果和仿真结果进行了对比。研究表明,通过合理的参数标定及简化假设,Johnson-cook模型和双线性材料模型均可提供满意的仿真结果,其中叶片损伤预测与试验结果很好地符合。鉴于双线性材料模型使用相对简单,同时能够提供足够的预测精度,在航空发动机鸟撞分析工程应用中值得推荐。
本文針對典型航空髮動機應變率相關材料,闡述瞭常用的Johnson-cook模型和雙線性材料模型及其參數標定方法,併將這兩箇材料模型分彆應用于風扇葉片鳥撞試驗的倣真分析,對試驗結果和倣真結果進行瞭對比。研究錶明,通過閤理的參數標定及簡化假設,Johnson-cook模型和雙線性材料模型均可提供滿意的倣真結果,其中葉片損傷預測與試驗結果很好地符閤。鑒于雙線性材料模型使用相對簡單,同時能夠提供足夠的預測精度,在航空髮動機鳥撞分析工程應用中值得推薦。
본문침대전형항공발동궤응변솔상관재료,천술료상용적Johnson-cook모형화쌍선성재료모형급기삼수표정방법,병장저량개재료모형분별응용우풍선협편조당시험적방진분석,대시험결과화방진결과진행료대비。연구표명,통과합리적삼수표정급간화가설,Johnson-cook모형화쌍선성재료모형균가제공만의적방진결과,기중협편손상예측여시험결과흔호지부합。감우쌍선성재료모형사용상대간단,동시능구제공족구적예측정도,재항공발동궤조당분석공정응용중치득추천。
Regarding typical strain rate dependent materials for aero engines, two commonly used material models, Johnson-cook model and bi-linear model, and relevant calibration methods are discussed. Then the two models are implemented in the simulation of a bird strike test, and the simulation results are compared with test results. It is shown that, through appropriate parameter calibration and reasonable simplifications, both models can provide satisfying results, in which the damage prediction is in good accordance with test observation. Since the bi-linear model is relatively easier to be implemented, while it can still provide enough prediction accuracy, the bi-linear model is recommended for bird strike analysis for aero engines.