Measurement of the Aerodynamic Pressures Produced by Passing Trains

MacNeill, Robert; Holmes, Samuel; Lee, H.S.

doi:10.1115/rtd2002-1643

Cited by 17 publications

(10 citation statements)

References 1 publication

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“…The maximum pressure pulse magnitudes outside and inside the carbody were obtained by experiment testing. Macneill et al 16 tested aerodynamic pressure on a stationary double-stack freight car induced by an adjacent Bombardier High-Speed Nonelectric Locomotive (HSNEL), at the speed from 60 to 130 mph. Chu et al 17 studied the pressure waves generated by two trains passing through each other in a tunnel.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic load spectrum and fatigue behaviour of high‐speed train's equipment cabin

Zhou

Chen

Wang

et al. 2019

Fatigue Fract Eng Mat Struct

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In present study, the aerodynamic fatigue behaviour of train equipment cabin was investigated. Pressure sensors were arranged at train passing side. Eight‐grade load spectrum was constructed by means of rain‐flow counting, and fatigue damage was calculated with Miner's rule and Carten‐Dolan rule, both for the matrix metals and welds. For welds, defect detection was considered via visual inspection with nondestructive test (VI‐NDT), pure nondestructive test (P‐NDT), and without nondestructive test (W‐NDT). The result confirms that welds play an unfavourable role rather than matrix metals. Weld damage in W‐NDT exceeds its limit (1.0) to designed mileage. Then, damage influence was studied under tunnel passing, train passing, and running direction. Running direction as the head car contributes 82% to approximately 86% and 70% to approximately 77% of the total damage for matrix metal and welds, respectively. Train passing gives more damage to matrix metals than welds. Tunnel passing contributes 25% to approximately 26% for both matrix metals and welds.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic load spectrum and fatigue behaviour of high‐speed train's equipment cabin

Zhou

Chen

Wang

et al. 2019

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Particularly, as two trains pass by each other in a long tunnel or a train enters a tunnel, the complex uctuations of aerodynamic loads and noise levels may cause concerns about operational safety, passengers' comfort and environmental issues. Previous work shows that when two trains moving in the opposite directions inside a tunnel, complicated transient pressure loads could act on the train bodies and tunnel wall [1][2][3][4][5][6]. In our design criterion, we would like to minimize the pressure rise.…”

Section: Introductionmentioning

confidence: 99%

Computations of two passing‐by high‐speed trains by a relaxation overset‐grid algorithm

Liu

2004

Numerical Methods in Fluids

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This paper presents a relaxation algorithm, which is based on the overset grid technology, an unsteady three-dimensional Navier-Stokes ow solver, and an inner-and outer-relaxation method, for simulation of the unsteady ows of moving high-speed trains. The ow solutions on the overlapped grids can be accurately updated by introducing a grid tracking technique and the inner-and outer-relaxation method. To evaluate the capability and solution accuracy of the present algorithm, the computational static pressure distribution of a single stationary TGV high-speed train inside a long tunnel is investigated numerically, and is compared with the experimental data from low-speed wind tunnel test. Further, the unsteady ows of two TGV high-speed trains passing by each other inside a long tunnel and at the tunnel entrance are simulated. A series of time histories of pressure distributions and aerodynamic loads acting on the train and tunnel surfaces are depicted for detailed discussions.

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“…al. [56] and used for comparison with CFD simulations. The simulations were employed to define conditions under which double-stack container cars are subject to tipover [57].…”

Section: Review Of Past Workmentioning

confidence: 99%

Application of CFD to Rail Car and Locomotive Aerodynamics

Paul

Johnson

Yates³

2009

The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains

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CFD methods have been employed to solve a number of efficiency, safety and operational problems related to the aerodynamics of rail cars and locomotives. This paper reviews three case studies: 1) numerical models were employed to quantify the drag characteristics of two external railcar features; namely, well car side-posts and inter-platform gaps. The effects of various design modifications on train resistance and fuel usage were evaluated. 2) An operational safety issue facing railroad operators is wind-induced tip-over. A study was completed using CFD and wind tunnel tests to develop a database of tip-over tendencies for a variety of car types within the Norfolk Southern fleet. The use of this database in the development of a speed restricting system for the Sandusky Bay Bridge is also discussed. 3) Another safety issue involves the behavior of diesel exhaust plumes in the vicinity of locomotive cabs. Numerical simulations were performed for a variety of locomotives operating under a number of ambient conditions (wind speed, wind direction). The concentration of diesel exhaust at the operator cab window was quantified. Where appropriate, the studies provide information on the correlation of the CFD results with previously collected wind tunnel and field data.

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Measurement of the Aerodynamic Pressures Produced by Passing Trains

Cited by 17 publications

References 1 publication

Aerodynamic load spectrum and fatigue behaviour of high‐speed train's equipment cabin

Aerodynamic load spectrum and fatigue behaviour of high‐speed train's equipment cabin

Computations of two passing‐by high‐speed trains by a relaxation overset‐grid algorithm

Application of CFD to Rail Car and Locomotive Aerodynamics

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