TY - JOUR
T1 - Understanding the impact response of bird strikes on engine blades using a novel wedge-Hopkinson bar system
AU - Chen, Xiaopeng
AU - Yin, Biao
AU - Tang, Zhongbin
AU - Liu, Jun
AU - Zhang, Haiyang
AU - Zhang, Chao
AU - Li, Yulong
N1 - Publisher Copyright:
© 2023
PY - 2023/12
Y1 - 2023/12
N2 - Bird strikes on engine blades, as a major concern for aviation safety, are complex impact events in which structural responses and bird deformations are coupled. To investigate the slicing process during a bird strike, a wedge-Hopkinson bar (WHB) system was developed to simulate a bird striking an engine blade. The system simplifies the measurement of impact responses by using strain gauges mounted on the bar to detect the signals. Systematic tests were conducted to determine the variation of impact responses using real birds with different masses and velocities. The peak impact force, transferred momentum, equivalent impact force, and time corresponding to the momentum centroid were obtained from the force-time histories to describe the impact process. The results identify the constancy of the normalized peak impact force and the normalized equivalent impact force against the impact velocity. However, the ratio of momentum transfer was found to decrease with increasing velocity. The experimental results for strikes on a wedge and strikes on an oblique planar plate revealed a reduction in the momentum transfer for the slicing state, leading to an impact of lower severity.
AB - Bird strikes on engine blades, as a major concern for aviation safety, are complex impact events in which structural responses and bird deformations are coupled. To investigate the slicing process during a bird strike, a wedge-Hopkinson bar (WHB) system was developed to simulate a bird striking an engine blade. The system simplifies the measurement of impact responses by using strain gauges mounted on the bar to detect the signals. Systematic tests were conducted to determine the variation of impact responses using real birds with different masses and velocities. The peak impact force, transferred momentum, equivalent impact force, and time corresponding to the momentum centroid were obtained from the force-time histories to describe the impact process. The results identify the constancy of the normalized peak impact force and the normalized equivalent impact force against the impact velocity. However, the ratio of momentum transfer was found to decrease with increasing velocity. The experimental results for strikes on a wedge and strikes on an oblique planar plate revealed a reduction in the momentum transfer for the slicing state, leading to an impact of lower severity.
KW - Bird strike
KW - Engine fan blade
KW - Experiment
KW - Impact force measuring
KW - Transferred momentum
UR - http://www.scopus.com/inward/record.url?scp=85172661071&partnerID=8YFLogxK
U2 - 10.1016/j.ijimpeng.2023.104782
DO - 10.1016/j.ijimpeng.2023.104782
M3 - 文章
AN - SCOPUS:85172661071
SN - 0734-743X
VL - 182
JO - International Journal of Impact Engineering
JF - International Journal of Impact Engineering
M1 - 104782
ER -