Determining method and measuring system of safety retreat distance of side personnel under action of train wind
A technology for personnel safety and determination methods, which is applied in the direction of railway vehicle testing, radio wave measurement systems, and devices for measuring the time required to move a certain distance, and can solve the problem of inability to correctly evaluate the safety retreat distance of lateral personnel on trains, etc. problems, to achieve the effect of eliminating the interference of various factors, reasonable test results, and good consistency
Active Publication Date: 2010-12-15
CENT SOUTH UNIV
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However, due to the limitations of the research conditions, the research results have not been evaluated by the high-speed train operation test, and cannot be used to correctly evaluate the safe evasion distance of train lateral personnel
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[0036]The method for determining the safe evacuation distance of lateral personnel under the action of train wind is to use a human body model to study the influence of train wind on the aerodynamic effect of personnel on the platform and on the roadside, and to evaluate the rationality of the safe evacuation distance of staff and passengers; When the train meets other trains, the amplitude of the interactive pressure shock wave provides a basis for the safety assessment of high-speed trains; it can measure the aerodynamic force of the human body model under the action of the train wind; monitor the speed and pressure changes of the train wind; and the human body model Transient pressure shocks in train wind.
[0037] Because the aerodynamic force received by the human body is related to the characteristic size of the human body, under normal body shape, the higher the human body is, the greater the force will be. Therefore, a 1:1 full-scale mannequin is used in the test syste...
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The invention relates to a determining method and a measuring system of safety retreat distance of side personnel under the action of train wind. The determining method comprises the following steps: measuring aerodynamic force born on the human body model positioned at a test point under the action of the train wind by adopting a full-scale human body model in a real train experiment, monitoringthe change of point velocity and pressure in the train wind with time; and obtaining transient pressure impaction on main parts of the human body model in the train wind. The invention can accuratelyevaluate the safety retreat distance of the side personnel in a train, systematically and scientifically measure the aerodynamic influence of the train wind to the personnel on a station and near thetrain line through the human body model and the actual measurement experiment, provide accurate digital basis for safety evaluation of the high speed train operation, and reasonably use the experimental result to evaluate the safety retreat distance of the working personnel and the passengers. The measuring system has reasonable structural design, and can effectively eliminate the interference ofvarious factors to obtain reasonable and accurate experimental result.
Description
technical field [0001] The invention belongs to the field of aerodynamics of high-speed trains, and in particular relates to a method and a test system for determining the safe retreat distance of lateral personnel under the action of train wind. Background technique [0002] The train is a large object running at high speed, and has its unique aerodynamic problems that need to be studied and solved. Due to the viscous effect of the air, when the train is running at high speed on the ground, it will drive the air around the train to move accordingly, forming a special unsteady flow, usually called train wind. The train wind shows the impact of the train on the surrounding environment and the safety of roadside personnel in the form of air flow and pressure changes. The effect of train wind decreases with the increase of the distance from the side of the train. In order to ensure the safety of passengers on the platform and roadside workers, a certain distance must be ensure...
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IPC IPC(8): G01M17/08G01M9/00G01L9/06G01P3/68G01P5/10
Inventor 田红旗许平熊小慧鲁寨军刘堂红刘辉
Owner CENT SOUTH UNIV