CN203096538U - Moving load analog loading device of rail traffic wheel shaft - Google Patents
Moving load analog loading device of rail traffic wheel shaft Download PDFInfo
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- CN203096538U CN203096538U CN 201220727641 CN201220727641U CN203096538U CN 203096538 U CN203096538 U CN 203096538U CN 201220727641 CN201220727641 CN 201220727641 CN 201220727641 U CN201220727641 U CN 201220727641U CN 203096538 U CN203096538 U CN 203096538U
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- rail
- wheel shaft
- actuator
- sleeper
- load
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Abstract
The utility model discloses a moving load analog loading device of a rail traffic wheel shaft. A plurality of actuators are arranged right on rail bearings along the rail direction, bottoms of the actuators are connected at middle-span portions of distributive girders, and the bottoms of two ends of each distributive girder are arranged above steel rails on two sides. Two continuous steel rails are paved on the rail bearings, and are respectively cut into independent segmental steel rails right above the rail bearings. Each pair of segmental steel rails are connected with the rail bearings through a buckling piece system, and an anti-off sleeve piece achieves exertion of vertical pressure and upward pulling force of the actuators. According to the train-rail-roadbed theoretical model, a stress-load-stroke curve of a single buckling piece system under the movement action of the wheel shaft at different moving speeds is confirmed to be used as a load motivation curve of each actuator, adjacent actuators are subjected to dynamic shock excitation at the same time interval along the moving direction of the wheel shaft, so that analog loading of moving load of the wheel shaft at different speeds is achieved. The moving load analog loading device provides a reliable and convenient loading platform for rail traffic kinetic model experimental researches.
Description
Technical field
The utility model relates to a kind of load charger, especially relates to a kind of track traffic wheel shaft traveling load analog loading device.
Background technology
China is in the stage of track traffic fast development, no matter is intercity common railway and high-speed railway, or city underground and light rail, all is in the quick process of construction.Be accompanied by the construction of track traffic facility and put into effect, increasing engineering problem highlights.Train at a high speed by the time interaction of load by wheel shaft and rail be passed to structure under the line, compare with traditional fixed point CYCLIC LOADING, the effect of wheel shaft and rail has typical mobile effect and speed effect, along with moving of wheel shaft, each deck is along the identical loading procedure of train direct of travel experience under the rail.This force way that is different from the fixed point loading has caused track structure to present different power performance with road structure.Therefore, realize effective simulation of Train Wheel axle load moving process, most important to the real power performance of research track traffic infrastructure.At present, wheel axle load tests of simulating means mainly contain two kinds of indoor model test and on-the-spot in-situ tests.Indoor model test is subjected to the restriction of place size and road speed, is difficult for realizing that the high-speed mobile of true car loads; Though on-the-spot in-situ test can adopt real wheel shaft moving process, residing environment more complicated is wayward, and is repeatable relatively poor.Existing wheel shaft dynamic load analogue means as the dynamic vibrator of Frequency Adjustable amplitude modulation SBZ30, adopts the quick rotation of eccentric block to produce vertical exciting force, can realize the high-frequency excitation of permanent position, and weak point is: the mobility that can't realize taking turns axle load; The pilot system of simulation high-speed transit Moving Loads, employing is by the forward and reverse mobile loader of centrifugal electric rotating machine control, drive vertical vibrator and realize the mobile loading of wheel axle load, but because size restrictions can't realize taking turns the at the uniform velocity mobile with higher speed of axle load.
Summary of the invention
In order to overcome the deficiency of existing indoor model test and on-the-spot in-situ test, the purpose of this utility model is to provide a kind of track traffic wheel shaft traveling load analog loading device, realizes wheel axle load high-speed mobile.
For achieving the above object, the technical solution adopted in the utility model is:
One, a kind of track traffic wheel shaft traveling load simulation loading method may further comprise the steps:
Step 1) is calculated by Train Track-roadbed theoretical model and is determined different translational speeds
The stressed load time-history curves of the single fastener system of following wheel shaft Moving Loads;
Step 2) spacing by high-speed railway design specifications sleeper direction along ng a path is
, by fastener system rail being connected with sleeper, it is many to separate segmentation rail that two continuous rail are located respectively to be cut to directly over the sleeper position, and the connection performance between rail and the sleeper remains unchanged;
Step 3) is in step 2) in each to all arranging a distribution beam directly over the segmentation rail, top, distribution beam span centre place connects an actuator, the stressed load time-history curves of the single fastener system that step 1) is obtained is as the load excitation curve of each actuator;
The load of each actuator excitation curve is all identical in the step 4) step 3), and each actuator begins the exciting life period at interval, the time interval of adjacent actuator exciting
Spacing by sleeper
And translational speed
Determine:
Step 5) is passed through according to the described time interval of step 4) along the adjacent actuator of wheel shaft moving direction
Carry out dynamic exciting successively, promptly realize different translational speeds
The simulation loading of wheel shaft traveling load.
Two, a kind of track traffic wheel shaft traveling load analog loading device:
A plurality of actuator are arranged directly over according to every sleeper direction along ng a path of high-speed railway, each actuator bottom connects at distribution beam span centre place with high-strength bolt, bottom, distribution beam two ends is fixedly mounted on directly over the rail of both sides, article two, continuous steel rail laying is on sleeper, directly over the sleeper position, cut into separate segmentation rail respectively, every pair of segmentation rail is connected with fastener system with sleeper, and the sleeper below is that railway roadbed, railway roadbed below are ground.
Described each actuator top is connected counter-force crossbeam span centre place, and every counter-force crossbeam two ends are fixed on two counter-force longerons, and the two ends of every counter-force longeron are connected on two support columns, and every support column bottom fixes on the ground.
It is the anticreep external member that bottom, described distribution beam two ends is fixedly mounted on every pair of device directly over the segmentation rail, and it realizes applying of actuator vertical pressure, also realizes applying of actuator uplift force.
The beneficial effect that the utlity model has is:
Article (1) two, after the rail segmentation, adjacent actuator is a load excitation curve with the stressed load time-history curves of single fastener system, and along the wheel shaft moving direction with dynamic exciting of the identical time successively, thereby replace entity Train Wheel shaft model to realize the mobile loading of the wheel axle load under the friction speed; (2) the anticreep external member realizes applying of actuator vertical pressure, also realizes applying of actuator uplift force.(3) avoided road speed to improve needed long distance and quickened the highway section, the size of having dwindled the laboratory test model greatly provides reliably weighted platform easily for carrying out the experimental study of track traffic kinetic model.
Description of drawings
Fig. 1 is the utility model device lateral schematic diagram.
Fig. 2 is the vertical schematic diagram of the utility model device.
Fig. 3 is that one section rail connects horizontal schematic diagram.
Fig. 4 is that one section rail connects vertical schematic diagram.
Fig. 5 is that wheel shaft moves down Train Track-roadbed theoretical model schematic diagram.
Fig. 6 is an actuator load excitation curve.
Among the figure: 1, actuator, 2, distribution beam, 3, the anticreep external member, 4, high-strength bolt, 5, fastener structures, 6, rail, 7, sleeper, 8, railway roadbed, 9, ground, 10, the counter-force crossbeam, 11, the counter-force longeron, 12, support column.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Present embodiment carries out on track traffic wheel shaft traveling load analog loading device illustrated in figures 1 and 2, selected tiny fragments of stone, coal, etc. track structure for use, fastener system 5 is selected the WJ-7 type for use, rail 6 models are selected CHN60 for use, sleeper 7 is selected III shaped steel reinforced concrete sleeper for use, and railway roadbed 8 is divided into railway roadbed top layer and railway roadbed bottom, and graded broken stone is selected on the railway roadbed top layer for use, the railway roadbed bottom is selected the A/B filler for use, and the spacing of every sleeper 7 direction along ng a paths is
8 sleepers 7 are set altogether, 8 actuator 1 are arranged above every sleeper 7 positions, each actuator 1 bottom connects at distribution beam 2 span centre places with high-strength bolt 4, it is anticreep external member 3 that bottom, distribution beam 2 two ends is fixedly mounted on every pair of device directly over the segmentation rail 6, it realizes applying of actuator 1 vertical pressure, also realizes applying of actuator 1 uplift force.Article two, continuous rail 6 is laid on the sleeper 7, directly over sleeper 7 positions, cut into the long segmentation rail 6 of separate 0.3m respectively, every pair of segmentation rail 6 is connected with sleeper 7 usefulness fastener systems 5, as shown in Figure 3 and Figure 4, sleeper 7 belows are that railway roadbed 8, railway roadbed 8 belows are ground 9, each actuator 1 top is connected counter-force crossbeam 10 span centre places, every counter-force crossbeam 10 two ends are fixed on two counter-force longerons 11, the two ends of every counter-force longeron 11 are connected on two support columns 12, and every support column 12 bottoms fix on the ground.
It is the plane structure hypothesis that wheel shaft shown in Figure 5 moves down Train Track-roadbed theoretical model, form by wheel shaft, rail 6, fastener structures 5, sleeper 7, railway roadbed 8 and ground 9 successively, rail 6 adopts Euler's beam hypothesis, is assumed to be simply supported beam, and the sleeper 7 of Discrete Distribution is assumed to be mass.Fastener system 5, railway roadbed 8 all adopt viscoplasticity spring hypothesis, and wherein railway roadbed 8 is distribution spring and damping, and wheel shaft and rail 6 interact in the train travelling process, and the active force of generation is born by the discrete fastener system 5 that supports in rail 6 belows.
Get the wheel shaft translational speed
Because this model is the problem of research structure moving mass system, be different from the dynamical problem that general fixed point loads, the governing equation that adopts is a partial differential equations, the method of using mode to decompose, the equilibrium equation of train subsystem, the equilibrium equation of rail and the equilibrium equation of sleeper are converted into the ODE group, find the solution, obtain in the wheel shaft translational speed according to the NEWMARK method
The stressed load time-history curves of single fastener system encourages curve with its load as each actuator as shown in Figure 6 during for 13.5km/h.
The load excitation curve of all actuator is all identical, and each actuator begins the exciting life period at interval, the exciting time interval of adjacent actuator
Spacing by sleeper
And train speed
Determine,
Along the adjacent actuator of wheel shaft moving direction according to the time interval
Carry out dynamic exciting successively, promptly realize the simulation loading of wheel shaft traveling load under the friction speed.
Claims (3)
1. track traffic wheel shaft traveling load analog loading device, it is characterized in that: a plurality of actuator (1) are arranged directly over according to every sleeper of high-speed railway (7) direction along ng a path, each actuator (1) bottom connects at distribution beam (2) span centre place with high-strength bolt (4), bottom, distribution beam (2) two ends is fixedly mounted on directly over the both sides rail (6), article two, continuous rail (6) is laid on the sleeper (7), directly over sleeper (7) position, cut into separate segmentation rail (6) respectively, every pair of segmentation rail (6) is connected with fastener system (5) with sleeper (7), and sleeper (7) below is railway roadbed (8), railway roadbed (8) below is ground (9).
2. a kind of track traffic wheel shaft traveling load analog loading device according to claim 1, it is characterized in that: described each actuator (1) top is connected counter-force crossbeam (10) span centre place, every counter-force crossbeam (10) two ends are fixed on two counter-force longerons (11), the two ends of every counter-force longeron (11) are connected on two support columns (12), and every support column (12) bottom fixes on the ground.
3. a kind of track traffic wheel shaft traveling load analog loading device according to claim 1, it is characterized in that: the device that bottom, described distribution beam (2) two ends is fixedly mounted on directly over every pair of segmentation rail (6) is anticreep external member (3), it realizes applying of actuator (1) vertical pressure, also realizes applying of actuator (1) uplift force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727641 CN203096538U (en) | 2012-12-26 | 2012-12-26 | Moving load analog loading device of rail traffic wheel shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727641 CN203096538U (en) | 2012-12-26 | 2012-12-26 | Moving load analog loading device of rail traffic wheel shaft |
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| Publication Number | Publication Date |
|---|---|
| CN203096538U true CN203096538U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220727641 Expired - Lifetime CN203096538U (en) | 2012-12-26 | 2012-12-26 | Moving load analog loading device of rail traffic wheel shaft |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101405A1 (en) * | 2012-12-26 | 2014-07-03 | 浙江大学 | Method and apparatus for simulated loading of rail transport axle moving load |
| CN107063606A (en) * | 2017-04-26 | 2017-08-18 | 和振兴 | The exciting device and Forecasting Methodology of predicted orbit traffic environment vibration and noise |
| CN108444685A (en) * | 2018-03-15 | 2018-08-24 | 中南大学 | A kind of vertical transverse and longitudinal couple of force conjunction loading simulator of high-speed railway wheel track |
-
2012
- 2012-12-26 CN CN 201220727641 patent/CN203096538U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101405A1 (en) * | 2012-12-26 | 2014-07-03 | 浙江大学 | Method and apparatus for simulated loading of rail transport axle moving load |
| US9747395B2 (en) | 2012-12-26 | 2017-08-29 | Zhejiang University | Simulated loading method and apparatus for moving load of wheel axle in rail transportation |
| CN107063606A (en) * | 2017-04-26 | 2017-08-18 | 和振兴 | The exciting device and Forecasting Methodology of predicted orbit traffic environment vibration and noise |
| CN108444685A (en) * | 2018-03-15 | 2018-08-24 | 中南大学 | A kind of vertical transverse and longitudinal couple of force conjunction loading simulator of high-speed railway wheel track |
| CN108444685B (en) * | 2018-03-15 | 2023-11-28 | 中南大学 | High-speed railway wheel rail vertical and horizontal force coupling loading simulation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |
|
| CX01 | Expiry of patent term |