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Journal ArticleDOI

Transient Analysis and Safety Assessment of Turbofan Engine Structures during Bird Ingestion

17 Jul 2020-International Journal of Aerospace Engineering (Hindawi Limited)-Vol. 2020, pp 1-17
TL;DR: It is drawn that the relevant analysis/simulation data could be submitted to engine certification administration as key documents, and the structural safety analysis and assessment method of turbofan engine due to bird ingestion could be applied as analysis and prediction work in the engine bird ingestion certification.
Abstract: The high bypass ratio turbofan engine’s load-carrying structure transient response during bird ingestion was analyzed in accordance with the engine bird ingestion certification regulations, the principles of structural safety assessment were represented, and the structural safety analysis and assessment method of Turbo-Fan engine during bird ingestion were proposed. A high bypass ratio turbofan engine’s FEM was established and verified the rationality when its’ operation. Large bird ingestion into an engine’s procedure was conducted, the dynamic responses of key components on engine’s load-carrying structures during the bird ingestion were discussed, and the safety assessment consequence was obtained. We draw a conclusion that the relevant analysis/simulation data could be submitted to engine certification administration as key documents, the structural safety analysis and assessment method of turbofan engine due to bird ingestion could be applied as analysis and prediction work in the engine bird ingestion certification.

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Citations
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Journal ArticleDOI
TL;DR: In this paper, a semiclosed-form physics-based rotordynamic analysis is presented to determine the transient bird-strike load at the blade root and at the support bearings of a rotating fan.
Abstract: This paper presents a semiclosed-form physics-based rotordynamic analysis which determines the transient bird-strike load at the blade root and at the support bearings of a rotating fan sha...

2 citations

Journal ArticleDOI
TL;DR: In this article , various gelatin simulated bird projectiles were used to impact two key positions of three-dimensional (3D) orthogonal woven composite stator blades used in aeroengines: the center and leading edge at the blade back.

2 citations

References
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Journal ArticleDOI
TL;DR: In this article, the impact behavior of an artificial bird impinging a flexible aeroengine fan blade was analyzed using the LS-DYNA simulation model and the results showed that the initial contact area between the bird and target in the early phase of the impact event would have a significant effect on the peak impact force.

117 citations

Journal ArticleDOI
TL;DR: In this paper, the simulation of bird strikes on engine blades was performed with an in-house Smoothed Particle Hydrodynamics (SPH) code coupled with a Transient Nonlinear Finite Element (DYNA3D) code.

59 citations


"Transient Analysis and Safety Asses..." refers background or methods in this paper

  • ...The bird model was based on hydrodynamic elasticplastic model and linear polynomial equation of state; the parameters of hydrodynamic elastic-plastic model [18] are listed in Table 4....

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  • ...[18] carried out the parametric studies on bird impact fan blade, which includes influence of the bird shape, the bird impact location, and impact time....

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Journal ArticleDOI
TL;DR: In this article, a transient dynamic analysis of a fan blade-out event highlights the complexity of the numerical technique, which includes all the nonlinearities of structural dynamics: plastic behavior of the materials, large displacemen, etc.
Abstract: In accordance with the FAA certification requirements, all modern commercial turbofan engines must successfully demonstrate its ability to withstand a fan blade-out (FBO) event through actual test. Possibility of losing a rotating fan blade from a running engine is a flight safety consideration, which must be addressed during the design phase of the engine. A typical fan blade-out event involves very complex nonlinear transient dynamics with large deflection of the release blade and rigid body rotation of the trailing blade as well as progressive failure and fragmentation of various components. Due to the nature of the impact type loading, the solution to the problem should also address dependence of the material behavior such as yield strength as a function of strain rates. In short, the transient dynamic analysis of a fan blade-out event highlights the complexity of the numerical technique, which includes all the nonlinearities of structural dynamics: plastic behavior of the materials, large displacemen...

51 citations


"Transient Analysis and Safety Asses..." refers background or methods in this paper

  • ...As a comprehensive analysis of specific numerical simulation methods, Sinha [27] summarized a variety of numerical simulation methods used in the analysis of birdslicing impact, including Lagrange, ALE, and SPH methods, and found that the SPH method can better characterize the physical and mechanical processes of fan blade bird ingestion....

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  • ...In order to analyze the dynamic load of the whole engine under the condition of fan casing containment, Sinha [35] adopted a modeling scale of about 0....

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  • ...In order to analyze the dynamic load of the whole engine under the condition of fan casing containment, Sinha [35] adopted a modeling scale of about 0.5 million elements and received good analysis results....

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  • ...[34], Sinha [35], and Jain [36] launched a series of modeling and simulation researches focused on blade off influence of components or whole engine, which could be referenced....

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  • ...In addition to the above research work, Heidari et al. [32], Dzenan [33], Cosme et al. [34], Sinha [35], and Jain [36] launched a series of modeling and simulation researches focused on blade off influence of components or whole engine, which could be referenced....

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Journal ArticleDOI
TL;DR: In this paper, an explicit 3-D finite element analysis using LS-DYNA is carried out to study the nonlinear transient response of a bird striking a fan system.
Abstract: Bird strike is a serious problem that affects both commercial and military aircrafts. Systematic modeling and simulation of bird strikes are severely lacking, especially for cases involving engine, fan blades, and casings. In the present investigation, explicit 3-D finite element analysis using LS-DYNA is carried out to study the nonlinear transient response of a bird striking a fan system. The bird strike is simulated using Lagrangian blade-bird formulations. The bird is modeled as a fluid jet with a homogenized fluidic constitutive relation, using the Brockman hydrodynamic model, which was found to be the most appropriate. The present simulations are validated using a benchmark test of a bird striking a rigid target that is reported in the literature. Following this validation, a reference case of a bird striking a flexible fan blade was set up and used as the reference case in a series of parametric studies. The effect of bird velocity and its size are examined and attention is given to strikes involving larger birds so as to address the lack of data in this area.

46 citations

Journal ArticleDOI
TL;DR: In this paper, a new numerical bird model considering more geometric characteristics than traditional ones was established, during which the smooth particles hydrodynamic (SPH) method and an equation of state (EOS) were employed.

44 citations