CN108614073B - Double-track roadbed scale test model system considering boundary effect - Google Patents
Double-track roadbed scale test model system considering boundary effect Download PDFInfo
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Abstract
The invention discloses a double-track roadbed scale test model system considering boundary effect, and belongs to the technical field of track detection equipment. The system comprises a damping soil box, a double-track railway track subgrade reduced scale structure model, a load input system and a data acquisition system. The damping soil box consists of an inner film layer, a spring layer, an outer metal layer, an extending beam and a connecting wire; the two-track railway track subgrade reduced scale structure model consists of a ballastless track or a ballasted track, a subgrade and a foundation layer; the load input system consists of an actuator and a connecting beam; the data acquisition system consists of an upper track structure detection device, a lower roadbed foundation structure detection device, a data acquisition and storage system, a connection device and a computer. The invention can consider the boundary effect, so that the model can reflect the prototype fully and truly, and the research on the actual dynamic response of the double-track roadbed is realized.
Description
Technical Field
The invention belongs to the technical field of track testing equipment, and particularly relates to a double-track roadbed scale test model system considering boundary effect.
Background
At present, the research on the dynamic response of the railway track and the roadbed comprises a field test and an indoor test, wherein the field test is limited by the running environment of a train, the test cost is high, and the requirement on the test technology is high, so the indoor test becomes a main research means. At present, indoor tests mainly focus on a track roadbed system with a single-line full-scale (full-scale) embankment-free structure, full-scale models are huge in size, great challenges are brought to manpower, financial resources and material resources, and test cost can be equivalent to that of field tests. More importantly, the boundary problem of the model is not solved in a common indoor test all the time, and the model is only put in a steel box body or a concrete masonry wall body generally. However, the ballasted and ballastless low-speed and high-speed railways which are built and put into use in China are basically track roadbed structures with double track embankments, and the research on railway models which actually run is necessary. The method is characterized in that a practical double-line band embankment track roadbed test model system is established, and a reduced scale test capable of simulating a real structure is carried out, so that the problem that the double-line track roadbed structure is rarely researched when being built and already put into use in China is solved, and labor, financial resources and material resources can be greatly saved compared with a full scale structural test.
In a real situation, the foundation has no boundary, but the general model has a fixed size, and the current research considers that limited displacement and energy consumption (actually energy transfer to the outside) which can be moved to the outside can be assumed in each position at the boundary. However, in the current indoor test, the track, the roadbed and the foundation model are contained in the steel box body or the concrete masonry wall body, namely the model boundary adopts a fixed boundary. Under the condition, when the train load simulated by the upper actuator is transmitted to the boundary of the model, the fixed boundary can not provide energy for freely moving the roadbed and the foundation, and can not absorb the transmitted energy (namely, the energy which is transmitted to the outside of the model through the boundary is returned to the inside of the model, so that the overall energy pseudomorphism of the model is large), and the research shows that the difference between the test result of the fixed boundary and the roadbed response result of the real situation is large.
Disclosure of Invention
In order to overcome the defects of the existing indoor model test, the actual freely moving displacement is provided for the roadbed and the foundation, the energy which is originally conducted out at the boundary is absorbed by the damping soil box, the integral energy balance of the model is kept, and the prototype is reflected more truly. The invention provides a double-track roadbed reduced scale test model system considering boundary effect, which comprises a damping soil box, a double-track railway roadbed reduced scale structure model, a load input system and a data acquisition system. The damping soil box is used for providing a boundary of the model, namely, the boundary effect of the model is considered, and the model is contained; the two-track railway roadbed reduced scale structure model is used for providing a test model; the load input system is used for providing input load; the data acquisition system is used for acquiring dynamic response data generated by the model under an input load; the two-line railway track subgrade reduced scale structure model is contained in a damping soil box, the load input system is arranged on the upper portion of the two-line railway track subgrade reduced scale structure model, and the detection device in the data acquisition system is buried in the two-line railway track subgrade reduced scale structure model.
Furthermore, the damping soil box comprises an inner film layer, a spring layer, an outer metal layer, an extending beam and a connecting wire, wherein the inner film layer, the spring layer and the outer metal layer are sequentially arranged from inside to outside. The upper part of the inner film layer is provided with an opening, the opening comprises a bottom surface and a side surface, the side surface and the bottom surface are integrated through bonding, and the bottom surface is flat; the spring layer comprises a plurality of mutually opposite springs, two ends of each spring are respectively bonded or welded with the inner film layer and the outer metal layer, the central shaft of each spring is perpendicular to the inner film layer, and the springs are arranged in groups and in order in a preferred embodiment; the upper part of the outer metal layer is opened, by way of example and not limitation, the outer metal layer can be in a cuboid shape, the top parts of four corners of the cuboid are respectively provided with an overhanging beam which is parallel to the bottom surface of the cuboid, has a certain included angle with the side surface of the cuboid and protrudes towards the inside of the cuboid, the inner end of the overhanging beam is in a cantilever type, and the outer end of the overhanging beam is welded and fixed with the outer metal layer; by way of example and not limitation, the overhanging beam may also be in a rectangular parallelepiped shape, a through hole is formed at an inner end (i.e., an end far away from the outer metal layer) of the overhanging beam, and a diameter of the through hole is larger than an outer diameter of the connecting wire; the top of the side surface of the inner film layer is provided with a through hole for penetrating a connecting wire, in a preferred embodiment, the top of each side surface of the inner film layer is inwards and properly rolled, and the rolled edge is fixed on the side surface film layer of the inner film layer in an adhesive manner and forms a through hole capable of penetrating the wire; the connecting wire is arranged in the through hole in a penetrating way, and two ends of the connecting wire are respectively tied in the through holes of the overhanging beams which are closest to the connecting wire respectively so as to fix the whole damping soil box.
In the invention, the number and the rigidity of the springs in the spring layer can be adjusted according to different test conditions; wherein, the number of the springs can be randomly preset, and the rigidity K of the springsavgThe numerical calculation analysis can be carried out by the following formula:
Kbnis the elastic coefficient (unit N/m)3)，αnFor correction factor, G is the shear modulus (in Pa or N/m) of the model soil2) R is the vertical distance (m) between the loading point and the boundary, KavgIs the stiffness of the spring (in N/m), N being the total number of springs per face, AiIs the area (unit m) of one side surface of the intima layer2)。
Literature sources of the above formula: chen J, Zhou G X, Zhou Y, Zhang F L. antibiotics on Three-dimensional Structure of Ballastless Track-summary expression in Proceedings of the 6th asset-Pacific symposium on structural reliability and its applications, vol.6; 2016, p.699-703.
The reduced scale structure model of the double-track railway track roadbed is a double-track railway, namely two track reduced scale structures which are symmetrically arranged on the longitudinal section of the center of the roadbed are arranged on the roadbed; further, the two-track railway roadbed reduced scale structure model can be a ballastless railway roadbed or a ballasted railway roadbed structure model. The ballastless track road model can comprise four small steel rails, fasteners, CRTS I-type or II-type or III-type ballastless track slabs, bonding layers, supporting layers, a roadbed surface layer, a roadbed bottom layer, a embankment layer and a foundation layer from top to bottom; firstly, filling a foundation layer at the bottom of a damping soil box, then sequentially filling a embankment layer, a roadbed bottom layer and a roadbed surface layer, then fixing a supporting layer of a concrete reinforced structure on the roadbed surface layer in a cast-in-place manner, paving a bonding layer on the supporting layer of the concrete reinforced structure, fixing a prefabricated CRTS I-type, II-type or III-type ballastless track plate on the bonding layer, and then connecting and fixing four small steel rails with the CRTS I-type, II-type or III-type ballastless track plate through fasteners. Similarly, the ballast track subgrade structure model can comprise a track bed layer, a embankment layer and a foundation layer from top to bottom, wherein the track bed layer consists of four small steel rails, fasteners, sleepers and ballast stones; firstly, filling a foundation layer at the bottom of a damping soil box, then sequentially filling a track bed layer consisting of a embankment layer and crushed stone ballast, then laying a sleeper on the track bed layer, and then connecting and fixing four small steel rails with the sleeper through fasteners.
The load input system comprises an actuator and a connecting beam; by way of example and not limitation, the connecting beam may be a rectangular parallelepiped, the lower portion of which presses against a rail located in the central cross section of the ballastless track slab, and the upper portion of which is connected to the actuator. The load input system is arranged in a mode of being singly arranged on the track scale structure on one side; or two track scale structures are arranged and are respectively and symmetrically arranged on the two track scale structures by taking the center longitudinal section of the roadbed as a symmetry axis.
The data acquisition system comprises an upper track structure detection device, a lower roadbed foundation structure detection device, a data acquisition and storage system, a connection device and a computer, wherein the upper track structure detection device comprises a displacement sensor, a strain gauge, a speed sensor and an acceleration sensor; the lower roadbed foundation structure detection device comprises a soil pressure sensor, a displacement sensor, a speed sensor and an acceleration sensor; one end (input end of the sensor) of the upper track structure detection device and one end (output end of the sensor) of the lower roadbed foundation structure detection device are buried in the two-line railway track roadbed reduced scale structure model, the other end (output end of the sensor) of the upper track structure detection device and the other end (output end of the sensor) of the lower roadbed foundation structure detection device are connected with the data acquisition and storage system through the connecting device, and the data acquisition and storage system is connected with the computer.
In the present invention, by way of example and not limitation, the side surface of the inner film layer may be any one of a circle, a rectangle or other polygons, and the material of the inner film layer may be high strength polyvinyl chloride or rubber, and the thickness of the inner film layer is at least 1 cm; the material of the outer metal layer and the overhanging beam can be any one of aluminum, steel, copper, iron, manganese and zinc; the shape of the through hole on the overhanging beam can be any one of circular, rectangular or other polygons; the connecting wire material can be any one of metal, aluminum, steel, copper, iron, manganese and zinc.
The double-track roadbed scale test model system considering the boundary effect provided by the invention relates to a scale track roadbed structure, and materials of all parts of the whole scale structure model are designed and manufactured according to a proportion.
Compared with the prior art, the invention has the beneficial effects that:
(1) the research on the actual dynamic response of the double-line track subgrade is realized.
(2) And considering the boundary effect, the roadbed and the foundation boundary can generate corresponding displacement at the boundary under the dynamic load of the train, and can absorb the energy transmitted to the boundary, so that the prototype is truly reflected.
(3) The size and the material of the model can be designed by self and are suitable for various environmental conditions.
Drawings
FIG. 1 is a schematic diagram of a two-track subgrade scale test model system considering boundary effects provided by an embodiment of the invention;
FIG. 2 is a schematic view of a damping tank provided by an embodiment of the present invention;
FIG. 3 is a schematic view of an outrigger on a damping box provided by an embodiment of the invention;
FIG. 4 is a reduced scale structural model and acquisition system of a two-track railroad track bed of the present invention;
reference numbers in the figures: the track comprises a damping soil box 1, a track subgrade scale structure model of a two-track railway, a load input system 3, a data acquisition system 4, an inner film layer 5, a spring layer 6, an outer metal layer 7, an outer extension beam 8, through holes 9, connecting lines 10, steel rails 11, fasteners 12, a ballastless track plate 13, a bonding layer 14, a supporting layer 15, a subgrade surface layer 16, a subgrade bottom layer 17, a embankment layer 18, a foundation layer 19, an actuator 20 and a connecting beam 21.
Detailed Description
The technical solution of the two-track roadbed scale test model system considering the boundary effect provided by the invention will be further explained with reference to the specific embodiment and the accompanying drawings. The advantages and features of the present invention will become more apparent in conjunction with the following description.
It should be noted that the embodiments of the present invention have better practicability, and are not intended to limit the present invention in any form. The technical features or combinations of technical features described in the embodiments of the present invention should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of the present invention may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of the present invention pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The drawings of the present invention are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and clearly illustrating embodiments of the present invention and are not intended to limit the scope of the invention in which the invention may be practiced. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the present disclosure without affecting the effect and the purpose of the present disclosure. And the same reference numbers appearing in the various drawings of the invention identify the same features or elements, which may be used in different embodiments.
Example (b):
as shown in fig. 1 to 4, the double-track roadbed scale test model system considering the boundary effect provided by the embodiment of the invention comprises a damping soil box 1, a double-track roadbed scale structure model 2, a load input system 3 and a data acquisition system 4; the damping soil box 1 comprises an inner film layer 5, a spring layer 6, an outer metal layer 7, an extending beam 8 and a connecting line 10, the double-track railway track subgrade reduced scale structure model 2 comprises a ballastless track model, and the ballastless track model comprises four small steel rails 11, fasteners 12, a CRTS I-type ballastless track slab 13, a bonding layer 14, a supporting layer 15, a subgrade surface layer 16, a subgrade bottom layer 17, a embankment layer 18 and a foundation layer 19; the load input system 3 comprises an actuator 20 and a connecting beam 21, the data acquisition system 4 comprises an upper track structure detection device, a lower roadbed foundation structure detection device, a data acquisition and storage system, a connecting device and a computer, and the upper track structure detection device comprises a displacement sensor, a strain gauge, a speed sensor and an acceleration sensor; the lower roadbed foundation structure detection device comprises a soil pressure sensor, a displacement sensor, a speed sensor and an acceleration sensor.
Because, the quantity and rigidity of the spring in the spring layer 6 can be adjusted according to different test conditions; wherein, the number of the springs can be randomly preset, and the rigidity K of the springsavgThe numerical calculation analysis can be carried out by the following formula:
Kbnis the elastic coefficient (unit N/m)3)，αnFor correction factor, G is the shear modulus (in Pa or N/m) of the model soil2) R is the vertical distance (m) between the loading point and the boundary, KavgIs the stiffness of the spring (in N/m), N being the total number of springs per face, AiIs the area (unit m) of one side surface of the intima layer2)。
In this embodiment, the number of springs N is preset to 20, G, R and AiObtained through actual measurement and respectively substituted into the formula, thereby obtaining the rigidity K of the springavgAnd manufacturing a preset number of springs according to the rigidity of the springs.
Then fixing one end of a spring in the spring layer 6 by using super glue on the peripheral inner wall of the outer metal layer 7, brushing super glue on the other end of the spring in the spring layer 6 and the outer side of the inner film layer 5, and connecting and fixing the spring layer 6 and the inner film layer 5; then, the joints of the four side surfaces and the bottom surface of the inner film layer 5 are bonded by waterproof strong glue, so that the five surfaces of the inner film layer 5 are integrated, then the tops of the side surfaces of the inner film layer 5 are respectively and properly rolled inwards, the rolled edges are fixed on the side surface film layers of the inner film layer 5 in a bonding mode to form four through holes capable of penetrating wires, connecting wires 10 are sequentially arranged in the four through holes, and the four through holes at the tops of the side surfaces are connected; four extending beams 8 are respectively fixed at four corners of the outer metal layer 7 by adopting a welding mode, and the included angle between the extending beams 8 and the side surface of the damping soil box 1 is 45 degrees; one end of the overhanging beam 8 far away from the outer metal layer 7 is provided with a through hole 9, the diameter of the through hole 9 is larger than the outer diameter of the connecting wire 10, and two ends of the connecting wire 10 are respectively tied in the through holes 9 of the overhanging beams 8 which are respectively closest to the connecting wire, namely one end of the connecting wire 10 is connected with one through hole 9, and the other end is connected with the other through hole 9).
Filling and installing a two-track railway roadbed reduced scale structure model 2 in a damping soil box 1, sequentially comprising a ground foundation layer 19, a embankment layer 18, a roadbed bottom layer 17, a roadbed surface layer 16, a supporting layer 15, a bonding layer 14, a CRTS I-type ballastless track plate 13, a fastener 12 and a steel rail 11 from bottom to top, and embedding a sensor in a data acquisition system 4 into the two-track railway roadbed reduced scale structure model 2 while installing; one end of the upper track structure detection device and one end of the lower roadbed foundation structure detection device are buried in the double-track railway roadbed reduced scale structure model 2, the other end of the upper track structure detection device and the lower roadbed foundation structure detection device are connected with a data acquisition and storage system through a connecting device, and the data acquisition and storage system is connected with a computer; and finally, connecting the data acquisition system 4 with acquisition equipment and a computer through a connecting wire 10, and fixing the actuator 20 on a connecting beam 21 to form the load input system 3.
The working mode of the double-track roadbed scale test model system considering the boundary effect provided by the embodiment of the invention is as follows: the actuator 20 outputs dynamic load, energy is transmitted to the double-track railway roadbed scale structure model 2 through the connecting beam 21, when the energy is transmitted to the model boundary, vibration of boundary particles of a roadbed surface layer 16, a roadbed bottom layer 17, a embankment layer 18 and a foundation layer 19 is caused, vibration energy of the boundary particles is transmitted to the inner film layer 5 and the spring layer 6 at the moment, stretching and compression of the spring layer 6 are caused, energy absorbed by the spring is energy which should be refracted out from the boundary, and therefore the boundary effect of a roadbed and a foundation medium is well simulated. Meanwhile, after the energy is transmitted to the two-track railway roadbed scale structure model 2, a detection device in the data acquisition system 4 starts to acquire data and transmits the data to the data acquisition and storage system through a connecting device, the data acquisition and storage system transmits the data to a computer, and a visual data graph including curves of changes of values such as acceleration and speed along with time can be seen on the computer. The data acquired by the computer are analyzed, so that the dynamic response and load transmission rule of the double-track embankment track subgrade structure are researched, and finally convenience is provided for the design and construction of the high-speed railway in China.
The above description is only illustrative of the preferred embodiments of the present invention and should not be taken as limiting the scope of the invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. A double-track roadbed scale test model system considering boundary effect is characterized in that: the device comprises a damping soil box (1), a double-track railway track subgrade reduced scale structure model (2), a load input system (3) and a data acquisition system (4);
the damping soil box (1) is used for providing the boundary of the model, namely the boundary effect of the model is considered, and the model is contained; the two-track railway track subgrade reduced scale structure model (2) is used for providing a test model; the load input system (3) is used for providing input load; the data acquisition system (4) is used for acquiring dynamic response data generated by the model under an input load;
the two-line railway track subgrade reduced scale structure model (2) is contained in the damping soil box (1), the load input system (3) is arranged on the upper portion of the two-line railway track subgrade reduced scale structure model (2), and the detection device in the data acquisition system (4) is buried in the two-line railway track subgrade reduced scale structure model (2);
the damping soil box (1) comprises an inner film layer (5), a spring layer (6), an outer metal layer (7), an extending beam (8) and a connecting wire (10), wherein the inner film layer (5), the spring layer (6) and the outer metal layer (7) are sequentially arranged from inside to outside;
the upper part of the inner film layer (5) is provided with an opening and comprises a bottom surface and a side surface, the side surface and the bottom surface are integrated through bonding, and the bottom surface is flat; the spring layer (6) comprises a plurality of mutually opposite springs, two ends of each spring are respectively bonded or welded with the inner film layer (5) and the outer metal layer (7), and the central shaft of each spring is perpendicular to the inner film layer (5); the upper part of the outer metal layer (7) is provided with an opening, and the top of the outer metal layer is provided with four extending beams (8) which are parallel to the bottom surface of the outer metal layer, have a certain included angle with the side surfaces of the outer metal layer and protrude towards the inside of the outer metal layer; the inner end of the overhanging beam (8) is cantilever type, the outer end of the overhanging beam (8) is welded and fixed with the outer metal layer (7), the inner end of the overhanging beam (8) is provided with a through hole (9), and the diameter of the through hole (9) is larger than the outer diameter of the connecting wire (10); the top of the side surface of the inner film layer (5) is provided with a through hole for penetrating the connecting wire (10); the connecting wire (10) is arranged in the through hole in a penetrating way, and two ends of the connecting wire (10) are respectively tied in the through holes (9) of the overhanging beams (8) which are respectively closest to the connecting wire;
the two-line railway track subgrade reduced scale structure model (2) is a two-line ballastless track subgrade structure model or a two-line ballasted track subgrade structure model;
the ballastless track roadbed model comprises four small steel rails (11), fasteners (12), ballastless track slabs (13), a bonding layer (14), a supporting layer (15) of a concrete steel bar structure, a roadbed surface layer (16), a roadbed bottom layer (17), a embankment layer (18) and a foundation layer (19) from top to bottom;
the foundation layer (19) is filled at the bottom of the damping soil box (1), a embankment layer (18), a roadbed bottom layer (17) and a roadbed surface layer (16) are sequentially filled on the foundation layer (19), a supporting layer (15) is fixed on the roadbed surface layer (16) in a cast-in-place mode, a bonding layer (14) is laid on the supporting layer (15), a ballastless track plate (13) is fixed on the bonding layer (14), and the four small steel rails (11) are fixedly connected with the ballastless track plate (13) through fasteners (12);
the ballast track subgrade structure model comprises a track bed layer, a embankment layer and a foundation layer from top to bottom, wherein the track bed layer consists of four small steel rails, fasteners, sleepers and ballast stones;
the foundation layer is filled at the bottom of the damping soil box (1), a track bed layer consisting of a embankment layer and broken stone ballast is sequentially filled on the foundation layer, a sleeper is laid on the track bed layer, and four small steel rails are fixedly connected with the sleeper through fasteners;
the load input system (3) comprises an actuator (20) and a connecting beam (21);
the lower part of the connecting beam (21) is pressed on the track of the double-track railway roadbed reduced scale structure model (2), and the upper part of the connecting beam is connected with an actuator (20);
the load input system (3) is arranged in a mode that the load input system is singly arranged on a track on one side of the double-track railway roadbed reduced scale structure model (2); or two railway tracks are arranged and are respectively and symmetrically arranged on the two side tracks of the double-track railway track subgrade reduced scale structure model (2) by taking the subgrade center longitudinal section as a symmetry axis;
the data acquisition system (4) comprises an upper track structure detection device, a lower roadbed foundation structure detection device, a data acquisition and storage system, a connecting device and a computer;
the upper track structure detection device comprises a displacement sensor, a strain gauge, a speed sensor and an acceleration sensor; the lower roadbed foundation structure detection device comprises a soil pressure sensor, a displacement sensor, a speed sensor and an acceleration sensor;
one ends of the upper track structure detection device and the lower roadbed foundation structure detection device are buried in the double-track railway roadbed reduced scale structure model (2), the other ends of the upper track structure detection device and the lower roadbed foundation structure detection device are connected with a data acquisition and storage system through a connecting device, and the data acquisition and storage system is connected with a computer.
2. The two-track subgrade scale test model system considering boundary effects according to claim 1, characterized in that: the reduced scale structure model (2) of the double-track railway roadbed is a reduced scale railway roadbed structure, and materials of all parts of the whole reduced scale structure model are designed and manufactured according to a proportion.
3. The two-track subgrade scale test model system considering boundary effects according to claim 1, characterized in that: the side surface of the inner film layer (5) is any one of a circle, a rectangle or other polygons, the inner film layer (5) is made of high-strength polyvinyl chloride or rubber, and the thickness of the inner film layer is at least 1 cm;
the outer metal layer (7) and the overhanging beam (8) are made of any one of aluminum, steel, copper, iron, manganese and zinc;
the shape of the through hole (9) on the overhanging beam (8) is any one of circular, rectangular or other polygons;
the connecting wire (10) can be made of any one of metal, aluminum, steel, copper, iron, manganese and zinc.
4. The two-track subgrade scale test model system considering boundary effects according to claim 1, characterized in that: the ballastless track slab (13) is CRTS I type, II type or III type.
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| US20030136858A1 (en) * | 2002-01-22 | 2003-07-24 | Zicha Jan Herman | Internally resilient tie for railway track |
| CN101748662B (en) * | 2009-12-30 | 2012-10-03 | 中铁八局集团有限公司 | Construction process for double-block ballastless track bed on subgrade |
| CN103063451B (en) * | 2012-12-26 | 2014-07-23 | 浙江大学 | Rail transit train wholly moving load analog loading method and device |
| CN103308401B (en) * | 2013-07-01 | 2014-10-01 | 浙江大学 | Preparation method for railway road bed large-week acceleration loading physical model test device |
| CN106226112A (en) * | 2016-09-21 | 2016-12-14 | 中南大学 | A kind of multi-functional reduced scale tunnel structure force model response characteristic laboratory test system and method |
| CN107389790B (en) * | 2017-06-13 | 2020-07-28 | 同济大学 | Visual test device of roadbed high-frequency vibration under plane strain condition |
| CN107476359A (en) * | 2017-09-11 | 2017-12-15 | 北京工业大学 | A kind of lamination shear model box for simulating Visco-spring Boundary |
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