CN101975696A - Testing method for loading alternating pneumatic load in high-speed train body - Google Patents

Testing method for loading alternating pneumatic load in high-speed train body Download PDF

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Publication number
CN101975696A
CN101975696A CN 201010517094 CN201010517094A CN101975696A CN 101975696 A CN101975696 A CN 101975696A CN 201010517094 CN201010517094 CN 201010517094 CN 201010517094 A CN201010517094 A CN 201010517094A CN 101975696 A CN101975696 A CN 101975696A
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China
Prior art keywords
load
train body
tested
computer system
car body
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Pending
Application number
CN 201010517094
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Chinese (zh)
Inventor
梁习锋
田红旗
高广军
刘堂红
杨明智
姚曙光
杨志刚
李志伟
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Central South University
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Central South University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Central South University filed Critical Central South University
Priority to CN 201010517094 priority Critical patent/CN101975696A/en
Publication of CN101975696A publication Critical patent/CN101975696A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a testing method for loading alternating pneumatic load in a high-speed train body. The method adopts a load loading device to carry loading and unloading on a tested train body which is provided with a detection sensor, and the detection sensor and a control system of the load loading device are electrically connected with a computer system; under the control of the computer system, the load loading device carries out repeated automatic loading and unloading on the tested train body according to the preset working conditions and the cycle time, and the computer system acquires and stores test data in real time by the detection sensor; after being provided with the detector sensor, the tested train body carries out sealing processing; and after the sealing detection conforms to the requirement, a sealed inner cavity of the tested train body is connected with the load loading device by a pipeline; and the alternating pneumatic load generated by the load loading device is directly loaded on the inner surface of the sealed inner cavity of the tested train body. The sealing detection is maintained for 5-10 minutes under the 1.2-1.5 times of test peak pressure, and the leakage is not over 2-4 percent.

Description

The inner test method that loads alternation pneumatic load of a kind of high-speed train body
Technical field
The present invention relates to a kind of test method, particularly relate to a kind of alternation pneumatic load that detects the inner test method that loads alternation pneumatic load of the high-speed train body of 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 inner test method that loads alternation pneumatic load of high-speed train body 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, the control system of detecting sensor and load charger is electrically connected with computer system;
Step 2: 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;
Carry out encapsulation process behind the described tested car body installation and measuring sensor, after sealing detection met the requirements, the inner chamber of tested body sealing was connected by pipeline with load charger; The alternation pneumatic load that described load charger produces directly is carried on the inside surface of inner chamber of tested body sealing.
Described sealing detection is doubly to test under the surge pressure with 1.2-1.5 to keep 5-10 minute, and its leakage is no more than 2-4%.
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, manual simulation's 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, the control system of detecting sensor and load charger is electrically connected with computer system;
Step 2: 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;
Carry out encapsulation process behind the described tested car body installation and measuring sensor, after sealing detection met the requirements, the inner chamber of tested body sealing was connected by pipeline with load charger; The alternation pneumatic load that described load charger produces directly is carried on the inside surface of inner chamber of tested body sealing.
Described sealing detection is doubly to test under the surge pressure with 1.2-1.5 to keep 5-10 minute, and its leakage is no more than 2-4%.
Described detecting sensor adopts the pressure transducer of strain transducer, displacement transducer and measurement air pressure.
The encapsulation process of described tested car body is carried out encapsulation process according to routine techniques with vehicle window, door, roof vent.
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 inside surface of inner chamber of tested body sealing.
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. the inner test method that loads alternation pneumatic load of a high-speed train body, 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, the control system of detecting sensor and load charger is electrically connected with computer system;
Step 2: 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;
It is characterized in that: carry out encapsulation process behind the described tested car body installation and measuring sensor, after sealing detection met the requirements, the inner chamber of tested body sealing was connected by pipeline with load charger; The alternation pneumatic load that described load charger produces directly is carried on the inside surface of inner chamber of tested body sealing.
2. the test method of high-speed train body external load alternation pneumatic load according to claim 1 is characterized in that: described sealing detection is doubly to test under the surge pressure with 1.2-1.5 to keep 5-10 minute, and its leakage is no more than 2-4%.
3. the test method of high-speed train body external load alternation pneumatic load 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.
CN 201010517094 2010-10-25 2010-10-25 Testing method for loading alternating pneumatic load in high-speed train body Pending CN101975696A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010517094 CN101975696A (en) 2010-10-25 2010-10-25 Testing method for loading alternating pneumatic load in high-speed train body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010517094 CN101975696A (en) 2010-10-25 2010-10-25 Testing method for loading alternating pneumatic load in high-speed train body

Publications (1)

Publication Number Publication Date
CN101975696A true CN101975696A (en) 2011-02-16

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979994A (en) * 2010-10-25 2011-02-23 中南大学 Method for testing alternating airload of train body of high-speed train
CN103389216A (en) * 2013-07-29 2013-11-13 中南大学 System and method for testing aerodynamic characteristics of movable train on basis of wind pressure integral
CN103837292A (en) * 2014-03-10 2014-06-04 奇瑞汽车股份有限公司 Method for testing negative pressure caused by cooling of battery pack of electric vehicle
CN104266851A (en) * 2014-10-13 2015-01-07 南车青岛四方机车车辆股份有限公司 Device for connecting airtight test vehicle body with airtight test bed box

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007240449A (en) * 2006-03-10 2007-09-20 Kagawa Univ Pressure sensor, pressure detector, and pressure detection method
CN101650265A (en) * 2009-09-14 2010-02-17 中南大学 Train aerodynamic force real test computing method
CN101776513A (en) * 2010-02-04 2010-07-14 中南大学 High-speed train body alternation pneumatic load test device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007240449A (en) * 2006-03-10 2007-09-20 Kagawa Univ Pressure sensor, pressure detector, and pressure detection method
CN101650265A (en) * 2009-09-14 2010-02-17 中南大学 Train aerodynamic force real test computing method
CN101776513A (en) * 2010-02-04 2010-07-14 中南大学 High-speed train body alternation pneumatic load test device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979994A (en) * 2010-10-25 2011-02-23 中南大学 Method for testing alternating airload of train body of high-speed train
CN103389216A (en) * 2013-07-29 2013-11-13 中南大学 System and method for testing aerodynamic characteristics of movable train on basis of wind pressure integral
CN103389216B (en) * 2013-07-29 2017-03-08 中南大学 Running train aerodynamic characteristic test system based on wind pressure integral and its method of testing
CN103837292A (en) * 2014-03-10 2014-06-04 奇瑞汽车股份有限公司 Method for testing negative pressure caused by cooling of battery pack of electric vehicle
CN103837292B (en) * 2014-03-10 2015-10-28 奇瑞汽车股份有限公司 A kind of batteries of electric automobile bag cools the negative pressure method of testing caused
CN104266851A (en) * 2014-10-13 2015-01-07 南车青岛四方机车车辆股份有限公司 Device for connecting airtight test vehicle body with airtight test bed box
CN104266851B (en) * 2014-10-13 2016-09-07 中车青岛四方机车车辆股份有限公司 Air seal test car body and air seal test platform box body connector

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Application publication date: 20110216