Evaluating Impact Damage of Flat Composite Plate for Surrogate Bird-Strike Testing of Aeroengine Fan Blade

Sun, Youchao; Zhang, Yuemei; Zhou, Yadong; Hai-tao, Zhang; Zeng, Haijun; Yang, Kun

doi:10.3390/jcs5070171

Cited by 9 publications

(4 citation statements)

References 26 publications

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“…As for the target fan model, the initial approach was to use a plate with a thickness [19,20]. In more recent studies, fan blades with realistic geometries have become more common, whereafter transient response of rotating is obtained under bird-slicing impact [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Responses of the Aero-Engine Rotor System to Bird Strike on Fan Blades at Different Rotational Speeds

Lin

Hedayati

et al. 2021

Applied Sciences

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To study the effect of a bird striking engine fan on the rotor system, a low-pressure rotor system dynamic model based on a real aero-engine structure was established. Dynamic equations were derived considering the case of the bird strike force which transferred to the rotor system. The bird strike force was obtained from the bird strike process simulation in LS-DYNA, where a smoothed particle hydrodynamics (SPH) mallard model was constructed using a computed tomography (CT) scanner, and finite element method (FEM) was used to simulate the bird strike on an actual fan model. The dynamic equations were solved using the Newmark-β method. The effect of rotational speeds on the rotor system dynamics after bird strike was investigated and discussed. Results show that the maximum bird impact force can reach 104 kN at 3772 r/min. Impact time is only 0.06 s, but the bird strike on fan blades lead to a transient shock on the rotor system. Under the action of transient shocks, the rotor system displacement in the horizontal and vertical directions increase sharply, and the closer the mass point is to the fan, the more it is affected; the vibration amplitude at the fan will increase 15 times within 0.1 s of the bird strike and will gradually decrease with the effect of damping. The dynamics of the rotor system changes from a stable single periodic motion to a complex irregular quasi-periodic motion after a bird strike, and the strike force excites the first-order vibrational mode of the rotor system. This phenomenon occurs at all speeds when bird strikes occur. Bird strikes will cause resonance in the rotor system, which may cause damage to the engine. It was also seen that the bird strike force, and hence the effects on the rotor system, increases as the engine rotational speed increases; the peak force is larger and the number of peaks has increased. The impact force at 3772 r/min is 99.5 kN higher than at 836 r/min, and three additional peaks emerged. This effect is more reflected in the amplitude, and the overall vibration characteristics do not change. Combining the bird strike with the rotor dynamics calculation, the dynamic response of the aero-engine rotor system to bird strike is studied at different flight stages, which is of guiding significance for power evaluation of aero engines after bird strike.

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Section: Introductionmentioning

confidence: 99%

Dynamic Responses of the Aero-Engine Rotor System to Bird Strike on Fan Blades at Different Rotational Speeds

Lin

Hedayati

et al. 2021

Applied Sciences

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“…The “leaf root” mentioned in this paper refers to the root area of the aero‐engine blade, as shown in Figure 8 in the Regulation ROI blue box area. It is believed that the root of the leaf occupies about 10% of the length of the entire leaf, and the deformation here is the smallest 40–42 . At the same time, the first 5 detection points in the Registration ROI of the blue area of the root are selected for tracking and positioning.…”

Section: Overall Scheme Design Of Measurement Systemmentioning

confidence: 99%

“…It is believed that the root of the leaf occupies about 10% of the length of the entire leaf, and the deformation here is the smallest. [40][41][42] At the same time, the first 5 detection points in the Registration ROI of the blue area of the root are selected for tracking and positioning. The homogeneous coordinates before and after the deformation of the detection point are P ri ¼ x ri y ri z ri 1 ½ T and P 0 ri ¼ x0 ri y0 ri z0 ri 1 ½ T , respectively, where i = 1 $ 5.…”

Section: Elimination Of Rigid Body Displacementmentioning

confidence: 99%

Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Sun

et al. 2022

Structural Contr & Hlth

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Under the working conditions of aero-engine, the three-dimensional composite deformation of the blade is caused by the centrifugal force generated by high-speed rotation and the load generated by gas scouring. Aiming at the problem of three-dimensional composite deformation on the surface of aeroengine blades under high-speed rotation, a three-dimensional deformation measurement method based on stroboscopic structure digital image correlation

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“…Hence, multi-blades with twisting angles were closer to the actual situation. To better observe the stress distribution, an entire fan was also introduced into the bird strike model [16,17]. The fan materials were mainly rigid at the beginning, and the blades could not be deformed during impact, which was not in line with reality [18].…”

Section: Introductionmentioning

confidence: 99%

Flocking Bird Strikes on Engine Fan Blades and Their Effect on Rotor System: A Numerical Simulation

Lin

Xie

et al. 2022

Aerospace

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Bird strikes are a common, serious, and devastating event in aviation accidents, and multi-bird strikes are also frequently reported. A numerical multi-bird-strike simulation was performed to investigate the effect of flocking birds striking on engine blades. The smooth particle hydrodynamics (SPH) method was adopted in the hemispherical-ended bird substitute model, and the finite element method (FEM) with EOS state equation was adopted for the fan model as well. Impact analyses have been presented using different flocking birds and impact location distributions. A “0-2-1” supported rotor system dynamic model was established to study the effect of the multi-bird-strike impact forces on the rotor system. The results show that bird-strike severity is related to the impact location distribution, with blade-root impacts being the most dangerous. The small flocking bird strikes had little effect on the fan compared to the cases of medium flocking birds and the large single bird. The dynamic response of the fan to the small flocking birds was the same as without a bird strike, while the other cases changed the motion period and excited the rotor first-order vibration.

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Evaluating Impact Damage of Flat Composite Plate for Surrogate Bird-Strike Testing of Aeroengine Fan Blade

Cited by 9 publications

References 26 publications

Dynamic Responses of the Aero-Engine Rotor System to Bird Strike on Fan Blades at Different Rotational Speeds

Dynamic Responses of the Aero-Engine Rotor System to Bird Strike on Fan Blades at Different Rotational Speeds

Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Flocking Bird Strikes on Engine Fan Blades and Their Effect on Rotor System: A Numerical Simulation

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