CN101979994A - Method for testing alternating airload of train body of high-speed train - Google Patents
Method for testing alternating airload of train body of high-speed train Download PDFInfo
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- CN101979994A CN101979994A CN 201010517115 CN201010517115A CN101979994A CN 101979994 A CN101979994 A CN 101979994A CN 201010517115 CN201010517115 CN 201010517115 CN 201010517115 A CN201010517115 A CN 201010517115A CN 101979994 A CN101979994 A CN 101979994A
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- airload
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Abstract
The invention discloses a method for testing alternating airload of a train body of a high-speed train. In the method, a tested train body is loaded or unloaded by using a load loading device, and is provided with a detection sensor, and the detection sensor is electrically connected with a control system and a computer system of the load loading device; the computer system controls the load loading device, the tested train body is automatically loaded or unloaded repeatedly according to the preset working condition and cycle number, and the computer system acquires and stores test data in real time through the detection sensor; the tested train body is provided with the detection sensor and then sealed; the load loading device is an alternating airload loading device, and the alternating airload produced in the process of working is loaded on the tested train body; the changed waveform of the alternating airload produced by the alternating airload loading device is a triangle waveform; and an alternating cycle of the triangle waveform of which the nonlinearity of the triangle waveform does not exceed 5 percent alternating airload is 10 to 60 seconds.
Description
Technical field
The present invention relates to a kind of test method, particularly relate to a kind of high-speed train body alternation pneumatic load test method that detects alternation pneumatic load to the strength and stiffness influence degree of high-speed train body.
Background technology
Along with popularizing of High Speed Train in China, extraneous strong air-flow is increasing to the influence of the car body generation of bullet train.But at present the static load mode of safety coefficient is taked in the strength test of car body basically, obviously science not.
Its weak point: fixed big of coefficient, the heaviness that car body is done increases the deadweight of car body, the waste resource and the energy.Fixed low of coefficient, car body strength and rigidity satisfy the requirement that high-speed secure travels.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide under static state a kind of, by high-speed train body being applied manual simulation's alternation pneumatic load, detect the high-speed train body alternation pneumatic load test method of high-speed train body strength and stiffness.
Purpose of the present invention is achieved by following technical proposals: described method adopts load charger that tested car body is carried out loading and unloading, and its step comprises:
Step 1: installation and measuring sensor on tested car body, detecting sensor and load charger are electrically connected with computer system;
Step 2: by the computer system control load charger, according to predefined operating mode and cycle index thereof tested car body is carried out repeatedly automatic loading and unloading, computer system is gathered in real time through detecting sensor and is also preserved test figure;
Carry out encapsulation process behind the described tested car body installation and measuring sensor; Described load charger is the alternation pneumatic load charger, and the alternation pneumatic load that produces during work is carried on the tested car body; The variation waveform of the alternation pneumatic load that described alternation pneumatic load charger is produced is triangular waveform; The nonlinearity of described triangular waveform is no more than 5%.
The alternating cycles of described triangular waveform is 10-60 second.
Described detecting sensor adopts the pressure transducer of strain transducer, displacement transducer and measurement air pressure.
Compared with prior art, the present invention has the following advantages: scientific and reasonable, alternation pneumatic carries near actual, helps designing the light-duty high-speed secure running vehicle body structure that is suitable for.Method of the present invention is suitable for the design of newly making and the qualification test of bullet train.
Embodiment
The invention will be further described below in conjunction with embodiment:
The method of the invention adopts load charger that tested car body is carried out loading and unloading, and its step comprises:
Step 1: installation and measuring sensor on tested car body, detecting sensor and load charger are electrically connected with computer system;
Step 2: by the computer system control load charger, according to predefined operating mode and cycle index thereof tested car body is carried out repeatedly automatic loading and unloading, computer system is gathered in real time through detecting sensor and is also preserved test figure;
Carry out encapsulation process behind the described tested car body installation and measuring sensor; Described load charger is the alternation pneumatic load charger, and the alternation pneumatic load that produces during work is carried on the tested car body; The variation waveform of the alternation pneumatic load that described alternation pneumatic load charger is produced is triangular waveform; The nonlinearity of described triangular waveform is no more than 5%.
The alternating cycles of described triangular waveform is 10-60 second.
At tested car body is actual car body or the car body model that proportionally dwindles.
Described detecting sensor adopts the pressure transducer of strain transducer, displacement transducer and measurement air pressure.Described detecting sensor adopts the product of prior art.
Described alternation pneumatic load charger adopts ripe prior art products.
Described computer system is divided into hardware and software.Hardware is the industrial computer type, and software is special software, the interface friendliness.Can realize man-machine conversation, preservation and swap data.Realize unmanned by special software.
Embodiment:
Being that the test that the CRH2 car body carries out alternation pneumatic load is an example to model.The physical dimension of this car body is 24.5 meters of length, 3.38 meters of width, 3.7 meters of height, and the peak value of alternation pneumatic load is 4000 handkerchiefs, the alternation cycle index is 100,000 times.
At tested car body installation and measuring sensor, adopt ripe prior art to paste installation, wherein strain transducer is 80,10 of displacement transducers, 3 of pressure transducers.All mounted detecting sensors are connected to computer system.
To the encapsulation process of tested car body, vehicle window, door, roof vent, bottom discharge mouth etc. are carried out encapsulation process according to routine techniques.
Tested car body after the encapsulation process is carried out sealing detection, with the test peak value of 1.5 times of alternation pneumatic load promptly 6000 handkerchiefs kept 8 minutes, it is not revealed and surpasses 2%.
The alternation pneumatic load that described load charger produces directly is carried on the surface of tested car body.
Energized starts computer system.Load charger carries out repeatedly automatic loading and unloading according to predefined operating mode and cycle index thereof to tested car body under the control of computer system, computer system is gathered in real time through detecting sensor and also preserved test figure.Entire test can be carried out under unattended state.
Claims (3)
1. high-speed train body alternation pneumatic load test method, described method adopt load charger that tested car body is carried out loading and unloading, and its step comprises:
Step 1: installation and measuring sensor on tested car body, the control system of detecting sensor and load charger is electrically connected with computer system;
Step 2: by the computer system control load charger, according to predefined operating mode and cycle index thereof tested car body is carried out repeatedly automatic loading and unloading, computer system is gathered in real time through detecting sensor and is also preserved test figure;
It is characterized in that: carry out encapsulation process behind the described tested car body installation and measuring sensor; Described load charger is the alternation pneumatic load charger, and the alternation pneumatic load that produces during work is carried on the tested car body; The variation waveform of the alternation pneumatic load that described alternation pneumatic load charger is produced is triangular waveform; The nonlinearity of described triangular waveform is no more than 5%.
2. a kind of high-speed train body alternation pneumatic load test method according to claim 1 is characterized in that: the alternating cycles of described triangular waveform is 10-60 second.
3. a kind of high-speed train body alternation pneumatic load test method according to claim 1 and 2 is characterized in that: described detecting sensor adopts the pressure transducer of strain transducer, displacement transducer and measurement air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010517115 CN101979994A (en) | 2010-10-25 | 2010-10-25 | Method for testing alternating airload of train body of high-speed train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010517115 CN101979994A (en) | 2010-10-25 | 2010-10-25 | Method for testing alternating airload of train body of high-speed train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101979994A true CN101979994A (en) | 2011-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010517115 Pending CN101979994A (en) | 2010-10-25 | 2010-10-25 | Method for testing alternating airload of train body of high-speed train |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004198317A (en) * | 2002-12-19 | 2004-07-15 | Railway Technical Res Inst | Wind tunnel test system |
| CN101476986A (en) * | 2009-01-23 | 2009-07-08 | 中国科学院力学研究所 | Movable model experiment system for high-speed train |
| CN101776513A (en) * | 2010-02-04 | 2010-07-14 | 中南大学 | High-speed train body alternation pneumatic load test device |
| CN101852672A (en) * | 2010-06-01 | 2010-10-06 | 西南交通大学 | High-speed train-tunnel aerodynamic characteristic movable model experiment system |
| CN101975696A (en) * | 2010-10-25 | 2011-02-16 | 中南大学 | Testing method for loading alternating pneumatic load in high-speed train body |
| CN101982752A (en) * | 2010-10-25 | 2011-03-02 | 中南大学 | Test method by loading alternating aerodynamic load outside train body of high-speed train |
-
2010
- 2010-10-25 CN CN 201010517115 patent/CN101979994A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004198317A (en) * | 2002-12-19 | 2004-07-15 | Railway Technical Res Inst | Wind tunnel test system |
| CN101476986A (en) * | 2009-01-23 | 2009-07-08 | 中国科学院力学研究所 | Movable model experiment system for high-speed train |
| CN101776513A (en) * | 2010-02-04 | 2010-07-14 | 中南大学 | High-speed train body alternation pneumatic load test device |
| CN101852672A (en) * | 2010-06-01 | 2010-10-06 | 西南交通大学 | High-speed train-tunnel aerodynamic characteristic movable model experiment system |
| CN101975696A (en) * | 2010-10-25 | 2011-02-16 | 中南大学 | Testing method for loading alternating pneumatic load in high-speed train body |
| CN101982752A (en) * | 2010-10-25 | 2011-03-02 | 中南大学 | Test method by loading alternating aerodynamic load outside train body of high-speed train |
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Application publication date: 20110223 |