Variability in Natural Frequencies of Railroad Freight Car Components

Shust, William; Iler, Darrell

doi:10.1007/978-1-4419-9834-7_113

Cited by 5 publications

(4 citation statements)

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“…The reason for its small value of frequency for the first torsional mode is it's a top open structure. The values of flexural frequencies for the first torsional and lateral bending modes of gondola car (open car) correspond to the frequency band reported by Shust et al 15 . Cacas and Viganico 4 have reported flexural frequencies for a gondola (open) car as 9.4 Hz for the first torsional mode and 21.8 Hz for the first lateral bending mode.…”

Section: Modal Analysis Of Carbodysupporting

confidence: 85%

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Effect of carbody flexibility on the dynamic performance of an empty freight wagon

Pandey¹

2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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The structural flexibility of passenger car bodies is paid most attention in research due to the effect it has on the passenger ride comfort. But as we are moving towards high speed and lightweight freight Railway stock, the issue of structural flexibility becomes essential in the case of freight wagons also. This paper investigates the effect of including the structural flexibility of the carbody of Indian Railway open freight car BOXNHL in the dynamic analysis. A mid surface meshed model of the subject carbody is developed using Hyperworks. Then, modal analysis is done using MSC FEA to identify the dominant flexible body modes. A simulation study has been conducted using NUCARS (New and Untried Car Analytic Regime Simulation) for an empty freight car on straight track and curve. Four types of carbodies have been considered for comparison- rigid carbody, flexible carbody having modal damping factor 0.04, 0.03, and 0.02. Vertical and lateral accelerations are chosen as the representative dynamic response parameters. The novelty of the present work lies in analyzing the effect of modal damping factors on the different response parameters (vertical and lateral accelerations) of empty BOXNHL freight wagon at different speeds. The field test results have been compared with the simulation results for identifying the modal damping factor with a minimum standard deviation.

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Section: Modal Analysis Of Carbodysupporting

confidence: 85%

“…It may also cause jerks to the laden commodities. Shust et al 15 have reported the band of natural frequencies in flexible modes for various railway freight cars.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbody flexibility on the dynamic performance of an empty freight wagon

Pandey¹

2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…One of the largest manufacturers of rolling stock is China Jinan Railway Vehicles Equipment Co., Ltd. (JRVEC) -a subsidiary of China CNR Corporation Limited. It produces a large number of different models of gondola cars, including gondolas with a body made of aluminum alloys: models C80 and C80V, allowing open top wagons to increase the carrying capacity by reducing the tare [7][8][9][10][11][12][13].…”

Section: Construction Analysis Gondola Carsmentioning

confidence: 99%

New Design of the Hatch Cover to Increase the Carrying Capacity of the Gondola Car

Baranovskyi¹,

Bulakh²,

Мyaмlin³

et al. 2022

Adv. Sci. Technol. Res. J.

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The paper presents a new design of the gondola car hatch cover to increase the carrying capacity. The results of calculations the CAD model of the gondola car hatch cover showed that the maximum equivalent stresses do not exceed 216.4 MPa, the maximum equivalent displacements are 3.323 mm, and the maximum equivalent strains are 6.834×10 -4 . A new design of the gondola car hatch cover helps reduce the tare weight of 1.2%, i.e. increase the load capacity of the gondola car of 0.9 tons. The proposed design of the gondola hatch cover allows one to reduce the amount of rolling stock in the train by one unit while maintaining the total mass of the train.

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“…To reduce the metal consumption of the rail freight car, aluminum and magnesium alloys are used [10][11][12], as well as honeycomb and sandwich panels [13,14]. However, its use leads to an increase in the cost of a freight car.…”

Section: Structural Features Of the Sbrfcmentioning

confidence: 99%

Increasing the Carrying Capacity of the Solid-Body Rail Freight Car

Baranovskyi¹,

Мyaмlin²,

Kebal³

2022

Adv. Sci. Technol. Res. J.

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In paper has been carried out to develop a load-bearing floor to increase the carrying capacity of the solid-body rail freight car. An analysis of the structures made it possible to formulate the hypothesis that the load-bearing floor of the solid-body rail freight car should have a different cross-sectional shape. As a result, the load-bearing floor of the solid-body rail freight car was proposed, making it possible to reduce the consumption of materials by 1 to 2%. The maximum equivalent stresses (according to Mises) of the proposed load-bearing floor of the solid-body rail freight car in static analysis are 210.7 MPa, which is less than the yield limit of simple carbon steel. The proposed technical solution allows one to increase the carrying capacity of the solid-body rail freight car by 1.4-1.7 tons. The proposed technical solutions for the future operating conditions of rail freight cars make it possible to reduce the number of units in a train by 1-2 units while maintaining the gross weight of the train.

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Variability in Natural Frequencies of Railroad Freight Car Components

Cited by 5 publications

References 0 publications

Effect of carbody flexibility on the dynamic performance of an empty freight wagon

Effect of carbody flexibility on the dynamic performance of an empty freight wagon

New Design of the Hatch Cover to Increase the Carrying Capacity of the Gondola Car

Increasing the Carrying Capacity of the Solid-Body Rail Freight Car

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