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High-speed train body alternation pneumatic load test device

A technology for aerodynamic loads and high-speed trains, which is applied in aerodynamic tests, measuring devices, and testing of machine/structural components. It can solve problems that do not involve fatigue strength testing methods and means, and achieve simple and reasonable structure and strong operability. , the effect of high data reliability

Active Publication Date: 2012-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they did not involve the fatigue strength testing method and means of the rolling stock car body under alternating aerodynamic loads

Method used

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  • High-speed train body alternation pneumatic load test device
  • High-speed train body alternation pneumatic load test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The air inlet of the blower GF is connected to the valves F1 and F3, and the muffler X1 and the air filter L are connected in sequence before the valve F1;

[0025] The air outlet of blower GF is connected to valves F2 and F4, and after valve F2 is connected to muffler X2;

[0026] The valves F3 and F4 are connected in series with the flow sensors P1-P2 and the safety valve AF to the vehicle body 6 under test through pipelines. In this embodiment, the safety valve AF is connected after the valve F4 and before the vehicle body 6 to be tested, and the flow sensors P1 and P2 are respectively connected after the valves F3 and F4 and before the vehicle body 6 to be tested.

[0027] The central console 1 is electrically connected to the blower GF, valves F1-F4, flow regulating valves Q1-Q2, temperature sensor 2, displacement sensor 3, pressure sensor 4, strain sensor 5 and safety valve AF.

Embodiment 2

[0029] Add on the basis of the example:

[0030] The valves F1 and F3 are matched with one-way valves D1 and D3, and the one-way valves D1 and D3 are arranged face to face. The valves F2 and F4 are matched with one-way valves D2 and D4, and the one-way valves D2 and D4 are arranged face to face.

[0031] Flow regulating valves Q1-Q2 are connected in series after the valves F3 and F4.

[0032] The safety valve AF is connected in series after the valves F3 and F4.

[0033] By analogy, other embodiments are no longer exhaustive.

[0034] working principle:

[0035] Take the vehicle length of the tested vehicle body 6=about 25 meters as an example, carry out the following settings in advance in the central console 1: the inflation time is 5 minutes, the exhaust time is 5 minutes, the number of tests is 100,000 times, the pressure amplitude in the vehicle body The value is 4000 Pa, the positive pressure relief value of the safety valve AF is 5000 Pa, and the negative pressure r...

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PUM

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Abstract

The invention relates to a high-speed train body alternation pneumatic load test device, which comprises a central control console and a blower GF; two sides of an air inlet of the blower GF are respectively connected with valves F1 and F3, and a silencer X1 and an air filter L are sequentially arranged before the valve F1; two sides of an air outlet of the blower GF are respectively connected with valves F2 and F4, and a silencer X2 is arranged behind the valve F2; and the valves F3 and F4 are connected with a train body to be tested after being respectively connected with flow-rate adjusting valves Q1 to Q2; a pressure sensor, a displacement sensor and a strain sensor are installed on the train body to be tested, and a temperature sensor is arranged inside the train body to be tested; and the device is also provided with a safety valve AF, and retaining valves D1 to D4. The high-speed train body alternation pneumatic load test device has simple and reasonable structure, the alternation pneumatic load which is manually simulated conforms to the real situation, and the detected data has high reliability; and the test device can automatically work all day long. The high-speed train body alternation pneumatic load test device is applicable to new railway locomotive vehicles or to the high-speed alternation pneumatic load fatigue test which is periodically performed.

Description

technical field [0001] The invention relates to a test device for railway locomotives, in particular to an alternating aerodynamic load test device for a high-speed train body that is affected by strong wind, tunnel wind or high-speed train passing on the strength of the locomotive when the high-speed train is running. Background technique [0002] With the promotion and application of high-speed trains, the speed of high-speed trains exceeds 250 kilometers per hour. When a high-speed train passes through a tunnel, two trains meet, and the train runs in a strong wind environment, the surface of the rolling stock body will be subjected to alternating aerodynamic loads with instantaneous changes in aerodynamic pressure of several thousand pascals. On the one hand, the alternating aerodynamic load has a great influence on the stiffness and fatigue strength of the rolling stock car body itself, and on the other hand, it also has a great influence on the comfort of the passengers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/08
Inventor 田红旗梁习锋高广军许平姚松刘堂红鲁寨军杨志刚李靖南王前选
Owner CENT SOUTH UNIV