CN109883679B - Railway sound barrier fatigue testing machine - Google Patents
Railway sound barrier fatigue testing machine Download PDFInfo
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- CN109883679B CN109883679B CN201910230288.4A CN201910230288A CN109883679B CN 109883679 B CN109883679 B CN 109883679B CN 201910230288 A CN201910230288 A CN 201910230288A CN 109883679 B CN109883679 B CN 109883679B
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- 230000004888 barrier function Effects 0.000 title claims abstract description 85
- 238000009661 fatigue test Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 64
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000010349 pulsation Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention relates to a railway sound barrier fatigue testing machine, which belongs to the technical field of vibration reduction and noise reduction, and comprises a servo hydraulic source, a servo actuator, a sound barrier test piece clamp, a sensor and a control system; the servo hydraulic source is connected with the servo actuator through an oil inlet pipe and an oil outlet pipe; the sensor is positioned on the servo actuator; the servo actuator acts on the sound barrier test piece through the sound barrier test piece clamp; the control system is respectively connected with the servo hydraulic source, the servo actuator and the sensor through control cables. The fatigue testing machine provided by the invention can simulate the working condition that the pulsating wind pressure of a train produces a pulling-pressing circulation effect on the sound barrier test piece, can meet the requirements of the sound barrier test pieces with different lengths and widths, can transfer loads through the test piece clamp pressure plate and four or more micro cambered surface force plate combined devices, and can reduce the pressure concentration phenomenon produced when a single plane force plate is used for stressing the sound barrier test piece.
Description
Technical Field
The invention relates to a fatigue testing machine, in particular to a railway sound barrier fatigue testing machine, and belongs to the technical field of vibration reduction and noise reduction.
Background
In order to solve noise pollution generated by railway operation, a large number of sound barriers are applied along the railway. When the train passes through the sound barrier, the train pulsation wind pressure can exert a pulling and pressing effect on the sound barrier, and the train pulsation wind pressure effect needs to be born millions times in the designed service life.
The fatigue resistance of the railway sound barrier is an important index of the mechanical property of the railway sound barrier, and the fatigue test of the sound barrier product is required to be carried out under the working condition of the least unfavorable design load so as to examine the fatigue resistance of the sound barrier.
Therefore, aiming at the train pulsation wind pressure effect and the railway sound barrier characteristics, the fatigue testing machine suitable for the railway sound barrier fatigue test is provided, the working condition that the train pulsation wind pressure produces a pulling-pressing circulation effect on the sound barrier unit plate can be simulated, the test force value precision is met, the test quantitative data is obtained, and the test requirements of sound barrier samples with different specifications are met.
Disclosure of Invention
Aiming at the train pulsation wind pressure effect and the railway sound barrier characteristics, the invention develops a fatigue testing machine suitable for the railway sound barrier fatigue test, which can simulate the working condition that the train pulsation wind pressure generates a pulling-pressing circulation effect on the sound barrier, test according to given frequency, load, action mode and times, and examine the fatigue resistance of the railway sound barrier.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A railway sound barrier fatigue testing machine is characterized in that: the device comprises a servo hydraulic source, a servo actuator, a sound barrier test piece clamp, a sensor and a control system; the servo hydraulic source is connected with the servo actuator through an oil inlet pipe and an oil outlet pipe; the sensor is positioned on the servo actuator; the servo actuator acts on the sound barrier test piece through the sound barrier test piece clamp; the control system is respectively connected with the servo hydraulic source, the servo actuator and the sensor through control cables; the sound barrier test piece clamp comprises a pressure plate, a force plate, a fixing screw rod, an adjustable clamping groove, a width adjusting screw rod and a length adjusting screw rod; the adjustable clamping groove, the pressure plate and the force plate clamp the sound barrier test piece through the fixing screw.
Preferably, the force plate is provided with four or more pieces.
Preferably, the periphery of the force application plate is chamfered.
Preferably, one side of the force plate acting on the sound barrier test piece is a micro-arc surface.
Preferably, the number of the fixing screws is at least eight.
Preferably, the width adjusting screw is adapted to sound barrier test pieces with different widths through adjusting the positions of the nuts.
Preferably, the length adjusting screw is adapted to sound barrier test pieces with different lengths through adjusting the positions of the nuts.
Preferably, the sensor includes a high-precision load sensor and a high-precision displacement sensor.
The beneficial effects are that:
The railway sound barrier fatigue testing machine simulates the working condition that the pulsating wind pressure of a train has a pulling-pressing circulation effect on a sound barrier test piece, and can reduce the pressure concentration phenomenon generated when a single plane type force plate applies force to the sound barrier test piece; can meet the requirements of sound barrier test pieces with different lengths and widths.
The invention is further illustrated by the drawings and the detailed description which follow, but are not meant to limit the scope of the invention.
Drawings
FIG. 1 is a schematic diagram of a railway sound barrier fatigue testing machine according to the present invention.
FIG. 2 is a schematic structural view of a test piece fixture in a railway sound barrier fatigue testing machine according to the present invention.
FIG. 3 is a cross-sectional view A-A of a test piece fixture in a railway sound barrier fatigue testing machine according to the present invention.
FIG. 4 is a B-B cross-sectional view of a test piece fixture in a railway sound barrier fatigue tester of the present invention.
The main reference numerals illustrate:
1 servo hydraulic source 2 oil inlet pipe
3 Oil return pipe 4 sensor
5 Servo actuator 6 test piece fixture
7 Sound barrier test piece 8 pressure plates
9 Force plate 10 fixing screw
11-Adjustable clamping groove 12-width adjusting screw
13 Length debugging screw 14 control system
15 Servo valve
Detailed Description
Example 1
The structural schematic diagram of the railway sound barrier fatigue testing machine is shown in fig. 1, wherein 1 is a servo hydraulic source, 2 is an oil inlet pipe, 3 is an oil return pipe, 4 is a sensor, 5 is a servo actuator, 6 is a test piece clamp, 7 is a sound barrier test piece, 14 is a control system, and 15 is a servo valve; the railway sound barrier fatigue testing machine comprises a servo hydraulic source 1, an oil inlet pipe 2, an oil return pipe 3, a sensor 4, a servo actuator 5, a test piece clamp 6 and a control system 14; the servo hydraulic source 1 is connected with the oil inlet pipe 2 through the servo valve 15, the oil inlet pipe 2 is connected with the servo actuator 5, servo oil enters the oil inlet pipe 2 through the servo valve 15 to provide power for the servo actuator 5, and then the servo oil enters the servo hydraulic source 1 through the oil return pipe 3 to circularly reciprocate in this way to provide power for the servo actuator 5; the sensor 4 is positioned on the servo actuator 5, and the sensor 4 comprises a high-precision load sensor and a high-precision displacement sensor; the servo actuator 5 acts on the sound barrier test piece 7 through the test piece clamp 6; the control system 14 is connected with the servo hydraulic pressure source 1, the servo actuator 5 and the sensor 4 through control cables respectively, controls each component to act according to given frequency, load, action mode and times, and acquires test data.
FIG. 2 is a schematic structural view of a test piece fixture in the railway sound barrier fatigue testing machine according to the present invention; FIG. 3 is a cross-sectional view of A-A of the test piece fixture of the railway sound barrier fatigue testing machine of the present invention; FIG. 4 is a cross-sectional view of a B-B section of a test piece fixture in a railway sound barrier fatigue tester of the present invention; wherein, 4 is a sensor, 7 is a sound barrier test piece, 8 is a pressure plate, 9 is a force plate, 10 is a fixing bolt, 11 is an adjustable clamping groove, 12 is a width adjusting screw, and 13 is a length adjusting screw; the invention discloses a test piece fixture 6 in a railway sound barrier fatigue testing machine, which comprises a pressure plate 8, a force plate 9, a fixing bolt 10, an adjustable clamping groove 11, a width adjusting screw 12 and a length adjusting screw 13; a pair of adjustable clamping grooves 11, a pressure plate 8 and a force plate 9 clamp the sound barrier test piece 7 through fixing screws 10 (four fixing screws 10 are arranged in the embodiment 1), and a width adjusting screw 12 and a length adjusting screw 13 are arranged on the adjustable clamping grooves 11; in this embodiment 1, four force plates 9 (four upper and lower plates or a plurality of force plates) are provided, the four sides are chamfered, one side of the surface acting on the sound barrier test piece 7 is a micro-arc surface, the adjustable clamping groove 11 is used for fixing sound barrier test pieces 7 with different specifications through adjustable screws (a width adjusting screw 12 and a length adjusting screw 13), and the width adjusting screw 12 is used for adapting to sound barrier test pieces with different widths through adjusting the positions of nuts; the length adjusting screw 13 is suitable for sound barrier test pieces with different lengths by adjusting the positions of nuts.
The railway sound barrier fatigue testing machine provided by the invention can simulate the working condition that the train pulsation wind pressure produces a pulling-pressing circulation effect on the sound barrier test piece, and can meet the sound barrier test pieces with different lengths and widths.
In the railway sound barrier fatigue testing machine, the pressure plate 8 of the test piece clamp and the four or more force plates 9 are combined to transfer load, the force plates 9 are provided with a plurality of peripheral chamfers, one side of the surface acting on the sound barrier test piece is a micro-arc surface, so that the pressure concentration phenomenon generated when a single plane force plate applies force to the sound barrier test piece can be reduced, and the action working condition of the pulsation wind pressure of a train is met.
The railway sound barrier fatigue testing machine provided by the invention can simulate the working condition that the train pulsation wind pressure produces a pulling-pressing circulation effect on the sound barrier test piece, can meet the requirements of the sound barrier test pieces with different lengths and widths, can transfer loads through the test piece clamp pressure plate and four or more micro cambered surface force plate combined devices, and can reduce the pressure concentration phenomenon produced when a single plane force plate applies force to the sound barrier test piece.
Claims (9)
1. A railway sound barrier fatigue testing machine is characterized in that: the device comprises a servo hydraulic source, a servo actuator, a sound barrier test piece clamp, a sensor and a control system; the servo hydraulic source is connected with the servo actuator through an oil inlet pipe and an oil outlet pipe; the sensor is positioned on the servo actuator; the servo actuator acts on the sound barrier test piece through the sound barrier test piece clamp; the control system is respectively connected with the servo hydraulic source, the servo actuator and the sensor through control cables; the sound barrier test piece clamp comprises a pressure plate, a force plate, a fixing screw rod, an adjustable clamping groove, a width adjusting screw rod and a length adjusting screw rod; the adjustable clamping groove, the pressure plate and the force plate clamp the sound barrier test piece through the fixed screw; the sensor is a high-precision load sensor and a high-precision displacement sensor; the force plate is arranged on two sides of the test piece, the periphery of the force plate is chamfered, one side of the surface acting on the sound barrier test piece is a micro-arc surface, the force plate is positioned on the inner side of the pressure plate facing the test piece, and the pressure plate of the test fixture is combined with the force plates with the micro-arc surfaces to transfer load.
2. The railway sound barrier fatigue testing machine according to claim 1, wherein: the force plate is provided with a plurality of blocks.
3. The railway sound barrier fatigue testing machine according to claim 1, wherein: four force plates are arranged.
4. The railway sound barrier fatigue testing machine according to claim 1, wherein: and chamfering the periphery of the force exerting plate.
5. The railway sound barrier fatigue testing machine according to claim 1, wherein: and one side of the force plate, which acts on the sound barrier test piece, is a micro-arc surface.
6. The railway sound barrier fatigue testing machine according to claim 1, wherein: the fixed screw is a plurality of.
7. The railway sound barrier fatigue testing machine according to claim 1, wherein: the number of the fixing screws is eight.
8. The railway sound barrier fatigue testing machine according to claim 1, wherein: the width debugging screw is suitable for sound barrier test pieces with different widths through adjusting the positions of the nuts.
9. The railway sound barrier fatigue testing machine according to claim 1, wherein: the length adjusting screw is suitable for sound barrier test pieces with different lengths through adjusting the positions of the nuts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910230288.4A CN109883679B (en) | 2019-03-22 | 2019-03-22 | Railway sound barrier fatigue testing machine |
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|---|---|---|---|
| CN201910230288.4A CN109883679B (en) | 2019-03-22 | 2019-03-22 | Railway sound barrier fatigue testing machine |
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| CN109883679A CN109883679A (en) | 2019-06-14 |
| CN109883679B true CN109883679B (en) | 2024-04-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE112021000473T5 (en) * | 2020-11-13 | 2022-10-27 | Shanghai Civil Engineering Co., Ltd. Of Crec | Fatigue tester for boot-shaped steel pillar base for railway noise barriers and its fatigue test method |
| CN112595610B (en) * | 2021-03-04 | 2021-06-22 | 中冶建筑研究总院有限公司 | Railway sound barrier column base support connection fatigue performance test method |
| CN112595616B (en) * | 2021-03-04 | 2021-06-25 | 中冶建筑研究总院有限公司 | Railway sound barrier column base steel structure fatigue performance test method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993021510A1 (en) * | 1992-04-20 | 1993-10-28 | Team Corporation | High frequency vibration test fixture with hydraulic servo valve and piston actuator |
| CN1851803A (en) * | 2006-05-22 | 2006-10-25 | 南京大学 | Sound intensity active acoustic shielding |
| CN104007018A (en) * | 2014-05-23 | 2014-08-27 | 北京中交桥宇科技有限公司 | Method and system for testing mechanical property of existing road sound barrier |
| CN107560657A (en) * | 2017-09-26 | 2018-01-09 | 北京铁路局保定工务段 | A kind of sound barrier monitoring system and method |
| CN108385551A (en) * | 2018-05-03 | 2018-08-10 | 衡水中铁建环保工程有限公司 | A kind of metal sound barrier with monitoring function |
| CN209542079U (en) * | 2019-03-22 | 2019-10-25 | 中国铁道科学研究院集团有限公司节能环保劳卫研究所 | A kind of railway sound barrier fatigue tester |
-
2019
- 2019-03-22 CN CN201910230288.4A patent/CN109883679B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993021510A1 (en) * | 1992-04-20 | 1993-10-28 | Team Corporation | High frequency vibration test fixture with hydraulic servo valve and piston actuator |
| CN1851803A (en) * | 2006-05-22 | 2006-10-25 | 南京大学 | Sound intensity active acoustic shielding |
| CN104007018A (en) * | 2014-05-23 | 2014-08-27 | 北京中交桥宇科技有限公司 | Method and system for testing mechanical property of existing road sound barrier |
| CN107560657A (en) * | 2017-09-26 | 2018-01-09 | 北京铁路局保定工务段 | A kind of sound barrier monitoring system and method |
| CN108385551A (en) * | 2018-05-03 | 2018-08-10 | 衡水中铁建环保工程有限公司 | A kind of metal sound barrier with monitoring function |
| CN209542079U (en) * | 2019-03-22 | 2019-10-25 | 中国铁道科学研究院集团有限公司节能环保劳卫研究所 | A kind of railway sound barrier fatigue tester |
Non-Patent Citations (2)
| Title |
|---|
| 基于三等效声源模型的高速铁路 声屏障降噪效果计算方法研究;刘兰华;《环保与能耗》;全文 * |
| 铁路插板式声屏障单元板抗疲劳性能检验方法解析;水春雨;《铁路节能环保与安全卫生》;全文 * |
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| CN109883679A (en) | 2019-06-14 |
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