Numerical simulation of a bird impact on a composite aerodynamic brake wing of a high-speed train

Zuo, Jianyong; Zhu, Xiaoyu; Wu, Meihong

doi:10.1177/0954409713508109

Cited by 7 publications

(1 citation statement)

References 15 publications

(24 reference statements)

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“…It is found that the effect of plate braking in the high-speed stage is obvious [3][4][5] . By means of simulations and full-scale tests, some researchers found that the plate shape has little effect on the braking effect [6] , however, it has an impact on the lateral aerodynamic performance of the train, and it may be a better choice to keep the plate shape consistent with the top surface of the train [7] . Considering the mechanical structure and ow eld changes comprehensively, it is determined that the reasonable plate opening angle is about 75 degrees [8,9] , the effect of arranging the plates in series on the train roof is better than is better than that of arranging a single plate with equal area [10] ; it is also found that car-connection part is an ideal location for arranging the plates, effect of placing a single large plate downstream of the car-connection is better than that of setting a single large plate upstream of the car-connection, and two small plates respectively upstream and downstream of the car-connection [12] .…”

Section: Introductionmentioning

confidence: 99%

Unsteady aerodynamic characteristics and dynamic performance of high-speed trains during plate braking under crosswind

Liu

Zheng

et al. 2023

Nonlinear Dyn

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As one of the key technologies of the train, the braking system plays a vital role in ensuring the safe operation of the train. Plate braking has the characteristics that the higher the train speed, the better the braking effect, and it can be used as one of the options for emergency braking of the high-speed train.The dynamic grid technology is used to realize the plate movement, and the unsteady aerodynamic characteristic simulation of the train in plate braking process is realized based on the IDDES with SST k-w turbulence model. The formation and evolution of the ow eld in the process of plate braking are analyzed by the visualization technology, and the in uence law of plate opening on the aerodynamic forces of each car under the crosswind is explored. By loading the aerodynamic forces into the vehicle system dynamics model for calculation, the safety indexes (derailment coe cient and wheel load reduction rate) of the plate braking train under crosswind with different speeds are obtained. The results show that the rapid opening of the plate provides a large braking force for the train, but it destroys the stability of the ow eld around the train, especially the ow eld above the train, and the above phenomenon further aggravated by crosswind. The aerodynamic force distribution of each car in the train was signi cantly changed by crosswind, the proportion of the lateral force of the head car in the train is signi cantly increased, and the aerodynamic forces of each car were further increased by the opening of the plate. From the perspective of vehicle dynamics performance, with the increase of crosswind speed, the derailment coe cient and wheel load reduction rate of each car increase obviously, and even derailment and overturn occur. Under the crosswind, the dynamic performance of the head car is the worst, and it was further deteriorated by opening of the plate. The impact of the tail car is relatively small, and the dynamic performance of the head car can be used to evaluate the safety of the train. It is recommended to avoid opening the plate of the head car in strong crosswind.

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Section: Introductionmentioning

confidence: 99%

Unsteady aerodynamic characteristics and dynamic performance of high-speed trains during plate braking under crosswind

Liu

Zheng

et al. 2023

Nonlinear Dyn

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Experimental and simulation study on surface material stripping of glass fiber reinforced composites by baking soda abrasive jetting technology

Xu,

Jiang,

Yang

et al. 2024

Composite Structures

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Soft impacts on aerospace structures

Abrate

2016

Progress in Aerospace Sciences

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This article provides an overview of the literature dealing with three types of soft impacts of concern for the aerospace applications, namely impacts of rain drops, hailstones and birds against aircraft. It describes the physics of the problem as it has become better understood through experiments, analyses, and numerical simulations. Some emphasis has been placed on the material models and the numerical approaches used in modeling these three types of projectiles.

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Numerical simulation of a bird impact on a composite aerodynamic brake wing of a high-speed train

Cited by 7 publications

References 15 publications

Unsteady aerodynamic characteristics and dynamic performance of high-speed trains during plate braking under crosswind

Unsteady aerodynamic characteristics and dynamic performance of high-speed trains during plate braking under crosswind

Experimental and simulation study on surface material stripping of glass fiber reinforced composites by baking soda abrasive jetting technology

Soft impacts on aerospace structures

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