Railway vehicle modal test equipment

Abstract

The invention provides railway vehicle modal test equipment which comprises a hoisting assembly, a bearing assembly and a transportation device, and the bearing assembly is suitable for bearing a to-be-tested vehicle body of a railway vehicle located in a test area. The transporting device is suitable for transporting the bearing assembly bearing the vehicle body to be tested to the test area, so that the bearing assembly is hoisted through the hoisting assembly, the vehicle body to be tested has freedom degrees in the length direction and the width direction, and the vehicle body to be tested is moved out of the test area after the test is completed. The bearing assembly is configured to provide a degree of freedom for the to-be-tested vehicle body in the height direction in a hoisted state so as to perform a modal test on the to-be-tested vehicle body.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rail vehicle performance testing, and more specifically, to a rail vehicle modal testing device. Background Art

[0002] As a key component of modern transportation, the development level of rail vehicle technology directly affects the safety, efficiency and environmental protection performance of railway transportation. Relying on the body structure of high-strength and lightweight materials, the optimized suspension and bogie system, the efficient electric drive technology and advanced signals, rail vehicles show excellent performance in high-speed driving, curve passing and crosswind resistance. At the same time, the in-depth research and application of energy-saving and environmental protection concepts have enabled rail vehicles to achieve remarkable results in reducing energy consumption and emissions, laying a solid foundation for the sustainable development of rail transportation.

[0003] Vehicle mode refers to the characteristics of the rail vehicle structure when it is subjected to external excitation, and the internal parts of the system vibrate at specific frequencies and vibration modes. Each mode has its own unique frequency (or natural frequency), damping ratio and vibration mode. Vehicle mode is an important part of the vehicle dynamic characteristics, which determines the response behavior of the vehicle under various operating conditions. The data provided by modal tests can be used to establish more accurate vehicle dynamic models, which can be used to predict the response of the vehicle under various operating conditions and provide a basis for vehicle performance evaluation. Through modal tests, the natural frequencies and vibration modes of the vehicle structure can be identified. This information is crucial to avoid resonance in the vehicle design stage, and can help identify potential defects or damage to the vehicle structure. During design, the modal characteristics can be optimized by adjusting the structural parameters to improve the dynamic performance of the vehicle. For example, by avoiding the frequency matching of the vehicle system and the track irregularity excitation, excessive vibration caused by resonance can be reduced, and ride comfort and safety can be improved.

[0004] Traditional rail vehicle modal tests mainly rely on finite element analysis (FEA) and experimental modal analysis (EMA). The finite element analysis method establishes a mathematical model of the vehicle structure and performs simulation analysis on a computer to predict the dynamic parameters of the vehicle structure, such as the natural frequency, vibration mode and damping ratio. However, this method relies on accurate model establishment and material properties and often has certain limitations. In related technologies, with the development of sensor technology, data acquisition systems and computers, more experimental modal methods are used, that is, the mechanical properties of the structure are identified by actually exciting and measuring the response of the vehicle structure at a specific frequency. However, the ideal vehicle body boundary is a free boundary. In order to simulate the vehicle body boundary in this unconstrained state, rubber blocks are usually used to support the vehicle body at multiple points. However, the rubber blocks themselves have a certain stiffness, resulting in the simulation effect is still not ideal, and it is difficult to use rubber blocks to provide the vehicle body with degrees of freedom in the three directions of lateral, longitudinal and vertical directions at the same time. Therefore, how to provide a modal test device that can provide the vehicle body with degrees of freedom in the above three directions and be as close to the ideal test state as possible has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, the present disclosure provides a rail vehicle testing device, which can simultaneously provide lateral, longitudinal and vertical degrees of freedom for the vehicle body, so that the boundary of the vehicle body is closer to an unconstrained state during the test.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a rail vehicle modal test equipment, comprising: a hoisting assembly; a bearing assembly, suitable for bearing a vehicle body to be tested of a rail vehicle located in a test area; and a transportation device, suitable for transporting the bearing assembly carrying the vehicle body to be tested to the test area, so as to lift the bearing assembly through the hoisting assembly so that the vehicle body to be tested has freedom in the width direction and the length direction, and move the vehicle body to be tested out of the test area after the test is completed; wherein the bearing assembly is configured to provide the vehicle body to be tested with freedom in the height direction in a hoisted state, so as to perform a modal test on the vehicle body to be tested.

[0007] According to an embodiment of the present disclosure, the above-mentioned bearing assembly includes: a bearing plate suspended below the above-mentioned lifting assembly; an elastic member installed on the above-mentioned bearing plate and supported on the bottom of the above-mentioned vehicle body to be tested, so as to reduce the resistance of the above-mentioned vehicle body to be tested when moving along the height direction.

[0008] According to an embodiment of the present disclosure, the elastic member includes an air spring, which is configured to be in an airless no-load state in response to the vehicle body to be tested being transported to the test area, and to be in an inflated state filled with at least a portion of gas in response to the vehicle body to be tested undergoing a modal test.

[0009] According to an embodiment of the present disclosure, the above-mentioned lifting assembly includes: two groups of lifting brackets, arranged on both sides of the above-mentioned vehicle body to be tested along the above-mentioned width direction; a plurality of lifting cables, extending downward from the two groups of the above-mentioned lifting brackets, respectively, and the above-mentioned lifting cables suspend the above-mentioned supporting plate between the two groups of the above-mentioned lifting brackets through the above-mentioned lifting points located on the above-mentioned supporting plate.

[0010] According to an embodiment of the present disclosure, each group of the above-mentioned lifting brackets includes: a column; a cross bar, which is slidably installed on the side wall of the above-mentioned column along the above-mentioned height direction and extends to the top of the above-mentioned supporting plate along the above-mentioned width direction, and the above-mentioned lifting cable extends downward from the above-mentioned cross bar to lift the above-mentioned supporting plate between the two above-mentioned columns.

[0011] According to an embodiment of the present disclosure, a first stopper which can slide back and forth along the height direction is installed on the side wall of the column facing the vehicle body to be tested, and is suitable for limiting the movement range of the vehicle body to be tested in the width direction.

[0012] According to an embodiment of the present disclosure, a slide groove extending along the width direction is provided on the supporting plate, and two elastic members are provided and slidably installed in the slide groove.

[0013] According to an embodiment of the present disclosure, the above-mentioned transportation device includes: a translation assembly, the above-mentioned load-bearing assembly is removably installed on the above-mentioned translation assembly, and the above-mentioned translation assembly is configured to reciprocate along the above-mentioned length direction to transport the above-mentioned load-bearing assembly carrying the above-mentioned vehicle body to be tested to the bottom of the above-mentioned lifting assembly, and move the above-mentioned vehicle body to be tested out of the above-mentioned test area after the test is completed.

[0014] According to an embodiment of the present disclosure, the above-mentioned transportation device also includes: a lifting assembly, which is configured to lift the above-mentioned bearing assembly and the above-mentioned vehicle body to be tested to a preset height in response to the above-mentioned bearing assembly being transported to the bottom of the above-mentioned lifting assembly by the above-mentioned translation assembly, so as to allow the above-mentioned bearing assembly to be suspended and connected with the above-mentioned lifting assembly; and in response to the above-mentioned bearing assembly being disconnected from the above-mentioned lifting assembly, carry the above-mentioned bearing assembly down to the above-mentioned translation assembly, so as to allow the above-mentioned translation assembly to move the above-mentioned bearing assembly carrying the above-mentioned vehicle body to be tested out of the above-mentioned test area.

[0015] According to an embodiment of the present disclosure, the above-mentioned lifting components are arranged in pairs facing each other in the width direction, and each of the above-mentioned lifting components includes: a lifting part, which is configured to be lifted and lowered along the above-mentioned height direction; and a support platform, which is slidably installed on the above-mentioned lifting component and supported on the above-mentioned lifting part, and there is a distance between the paired above-mentioned lifting components, and the above-mentioned distance is set to allow the above-mentioned translation component to move and allow the above-mentioned bearing plate to be placed on the two above-mentioned support platforms.

[0016] According to an embodiment of the present disclosure, the above-mentioned bearing components are provided in two groups, respectively supporting the two ends of the above-mentioned vehicle body to be tested along the above-mentioned length direction; the above-mentioned lifting components are also arranged in two pairs facing each other in the width direction, respectively lifting and cooperating with each group of the above-mentioned bearing components.

[0017] According to an embodiment of the present disclosure, two second stop portions are further included, which are arranged at both ends of the vehicle body to be tested along the above-mentioned length direction, and are suitable for limiting the movement range of the above-mentioned vehicle body to be tested in the above-mentioned length direction during the test of the above-mentioned vehicle body to be tested, and allowing the above-mentioned transportation device and the above-mentioned vehicle body to be tested to pass through the above-mentioned second stop portions before and after the test.

[0018] According to an embodiment of the present disclosure, the second stop portion can reciprocate along the length direction to meet different test requirements.

[0019] In the rail vehicle modal test equipment provided by the present disclosure, the vehicle body to be tested of the rail vehicle is pre-placed on a load-bearing assembly, then transported to a test area by a transport device, and then hoisted by a hoisting assembly, so that the vehicle body to be tested has degrees of freedom in height, length and height directions at the same time, thereby making the vehicle body to be tested closer to an ideal unconstrained state and obtaining more accurate modal test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0021] Figure 1 is a schematic diagram of a rail vehicle modal test device provided by the present disclosure after loading a vehicle body to be tested;

[0022] Figure 2 is a three-dimensional schematic diagram of a rail vehicle modal test device provided by the present disclosure;

[0023] Figure 3 yes Figure 1 A schematic diagram of the positional relationship among the vehicle body to be tested, the bearing assembly and the translation assembly in the exemplary embodiment shown;

[0024] Figure 4 is a plan view of a rail vehicle modal test device provided by the present disclosure;

[0025] Figure 5 yes Figure 4 A schematic plan view of a rail vehicle modal test apparatus after loading a vehicle body to be tested in the exemplary embodiment shown;

[0026] Figure 6 yes Figure 4 A schematic diagram of the connection relationship between the translation assembly and the bearing assembly in the exemplary embodiment shown;

[0027] Figure 7 yes Figure 4 A perspective schematic diagram of a transport trolley for a translation assembly in the exemplary embodiment shown;

[0028] Figure 8 yes Figure 2 An enlarged view of a portion of an exemplary embodiment is shown.

[0029] In the drawings, the meanings of the reference numerals are as follows:

[0030] 1. Load-bearing components;

[0031] 11. Loading plate;

[0032] 111. Lifting point;

[0033] 112. Chute;

[0034] 113. Buffer column;

[0035] 12. Elastic parts;

[0036] 2. Hoisting components;

[0037] 21. Lifting bracket;

[0038] 211, pillar;

[0039] 212, horizontal bar;

[0040] 22. Lifting cables;

[0041] 3. Transport device;

[0042] 31. Translation component;

[0043] 311. Transport trolley;

[0044] 312, trolley track;

[0045] 32. Lifting assembly;

[0046] 321, lifting unit;

[0047] 322, support platform;

[0048] 4. A first stopper;

[0049] 5. A second stopper;

[0050] 51. Stop frame;

[0051] 52. Baffle. DETAILED DESCRIPTION

[0052] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0053] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0054] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0055] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0056] Figure 1 is a schematic diagram of the rail vehicle modal test equipment provided by the present disclosure after loading the vehicle body to be tested, Figure 2 It is a three-dimensional schematic diagram of the rail vehicle modal test equipment provided by the present disclosure.

[0057] The embodiment of the present disclosure provides a rail vehicle modal test device, such as Figure 1 and Figure 2 As shown, it includes a hoisting assembly 2, a bearing assembly 1 and a transport device 3, wherein the bearing assembly 1 is suitable for bearing the vehicle body to be tested of the rail vehicle located in the test area. The transport device 3 is suitable for transporting the bearing assembly 1 carrying the vehicle body to be tested to the test area, so as to lift the bearing assembly 1 through the hoisting assembly 2 so that the vehicle body to be tested has degrees of freedom in the length direction and the width direction, and to move the vehicle body to be tested out of the test area after the test is completed. The bearing assembly 1 is configured to provide the vehicle body to be tested with degrees of freedom in the height direction in the hoisted state, so as to perform a modal test on the vehicle body to be tested.

[0058] In such an implementation, the vehicle body to be tested of the rail vehicle is pre-placed on the load-bearing assembly 1, and the load-bearing assembly 1 together with the vehicle body to be tested is transported to the test area by the transportation device 3, and then the load-bearing assembly 1 is lifted by the lifting assembly 2. When the load-bearing assembly 1 is in the lifted state, it carries the vehicle body to be tested and provides the vehicle body to be tested with freedom in the height direction. At the same time, since the load-bearing assembly 1 together with the vehicle body to be tested is suspended by the lifting assembly 2, it also has freedom in the length and width directions. In this way, when the vehicle body to be tested is subjected to external excitation, the response generated is closer to the excitation response under the ideal state, thereby obtaining more accurate test data.

[0059] Figure 3 yes Figure 1 The schematic diagram of the positional relationship among the vehicle body to be tested, the bearing assembly and the translation assembly in the exemplary embodiment shown in FIG. Figure 4 is a schematic plan view of a rail vehicle modal test device provided by the present disclosure, Figure 5 yes Figure 4 A schematic plan view of a rail vehicle modal test apparatus after loading a vehicle body to be tested in the exemplary embodiment shown, Figure 6 yes Figure 4 The schematic diagram of the connection relationship between the translation assembly and the bearing assembly in the exemplary embodiment shown, Figure 7 yes Figure 4 A schematic perspective view of a transport cart for a translation assembly in an exemplary embodiment is shown.

[0060] In an exemplary embodiment, Figure 3-Figure 6 As shown, the bearing assembly 1 includes a bearing plate 11 and an elastic member 12. The bearing plate 11 is suspended below the hoisting assembly 2. The elastic member 12 is installed on the bearing plate 11 and supported on the bottom of the vehicle body to be tested to reduce the resistance when the vehicle body to be tested moves along the height direction.

[0061] In such an embodiment, the load-bearing plate 11 is directly connected to the lifting assembly 2 by suspension, the elastic member 12 is installed on the load-bearing plate 11, and the vehicle body to be tested is placed on the elastic member 12. When external excitation is applied, the vehicle body to be tested moves in the height direction, thereby having kinetic energy, and converting the kinetic energy into elastic potential energy of the elastic member 12 by contacting and compressing the elastic member 12. This is repeated, so that the resistance of the vehicle body to be tested is smaller when it moves in the height direction, reducing energy loss and simulating the vehicle body boundary in an unconstrained state as much as possible.

[0062] According to an embodiment of the present disclosure, the elastic member 12 includes an air spring, which is configured to be in an airless and unloaded state in response to the vehicle body to be tested being transported to the test area, and to be in an inflated state filled with at least a portion of air in response to the vehicle body to be tested undergoing a modal test.

[0063] In such an embodiment, when the transport device 3 transports the load-bearing assembly 1 and the vehicle body to be tested, the air spring is not in an unloaded state to ensure the stability of the transport process and prevent the vehicle body to be tested from tipping over. When the load-bearing assembly 1 and the vehicle body to be tested are lifted, the air spring is switched to an inflated state, and the inflated amount is adjusted according to the stiffness coefficient required for the test.

[0064] In some other embodiments, the elastic member 12 may also be a hydraulic spring, a magnetorheological spring, an electromagnetic spring, etc., which is selected according to the cost investment of the test and the required control accuracy.

[0065] In an exemplary embodiment, Figure 2 and Figure 4 As shown, the hoisting assembly 2 includes two sets of hoisting brackets 21 and a plurality of hoisting cables 22. The two sets of hoisting brackets 21 are arranged on both sides of the vehicle body to be tested along the width direction, and the plurality of hoisting cables 22 extend downward from the two sets of hoisting brackets 21 respectively, and the load-bearing plate 11 is suspended between the two sets of hoisting brackets 21 through the hoisting points 111 located on the load-bearing plate 11.

[0066] In such an embodiment, a connecting hook is installed at the end of the lifting cable 22, or the end of the lifting cable 22 is directly formed into a hook shape, and the lifting point 111 on the load-bearing plate 11 includes but is not limited to a metal ring, which is connected to the connecting hook or the hook-shaped end to realize the lifting of the load-bearing plate 11.

[0067] In some other embodiments, the end of the lifting cable 22 can also be configured into a ring shape, and the corresponding lifting point 111 is a bolt to achieve the lifting of the bearing plate 11.

[0068] More specifically, two groups of lifting brackets 21 are arranged on both sides of the vehicle body to be tested, and two lifting cables 22 are installed on each group of lifting brackets 21. Multiple lifting points 111 are symmetrically arranged on the load-bearing plate 11 along the width direction, and preferably two lifting points 111 are set on each side of the load-bearing plate 11.

[0069] Exemplarily, the hoisting cable 22 includes but is not limited to a steel cable. The upper end of the hoisting cable 22, that is, the end away from the load-bearing plate 11, can also be connected to the hoisting bracket 21 using a hoisting point 111, or a connection method with a higher degree of freedom such as a Hook joint or a ball joint.

[0070] According to the embodiments of the present disclosure, Figure 4 and Figure 5 As shown, each set of lifting brackets 21 includes a column 211 and a cross bar 212. The cross bar 212 is slidably installed on the side wall of the column 211 along the height direction and extends to the top of the supporting plate 11 along the width direction. The lifting cable 22 extends downward from the cross bar 212 to lift the supporting plate 11 between the two columns 211.

[0071] In such an embodiment, the upright column 211 is arranged on the ground or on a test equipment table, and the cross bar 212 is connected to the hoisting cable 22 and can slide in the height direction to adjust the height of the supporting plate 11 .

[0072] In some other embodiments, a column slide groove is arranged on the ground or on the table of the experimental equipment, and the column 211 can slide in the column slide groove along the length direction to change the hoisting position.

[0073] Further according to an embodiment of the present disclosure, a first stopper 4 which can slide back and forth in the height direction is installed on the side wall of the column 211 facing the vehicle body to be tested, and is suitable for limiting the movement range of the vehicle body to be tested in the width direction.

[0074] In such an embodiment, the vehicle body to be tested is located between the first stoppers 4 of the two uprights 211, and is restricted to move within the spacing between the two first stoppers 4, so as to avoid the applied external excitation causing the vehicle body to be tested to have a large displacement in the width direction. The first stoppers 4 can also slide back and forth in the height direction to adapt to the hoisting height of the vehicle body to be tested.

[0075] In some other embodiments, an elastic block is further provided at the end of the first stop portion 4 , including but not limited to being made of rubber, to prevent the vehicle body from being damaged by excessive impact force when the vehicle body to be tested contacts the first stop portion 4 .

[0076] In an exemplary embodiment, Figure 6 As shown, a slide groove 112 extending along the width direction is provided on the bearing plate 11 , and two elastic members 12 are provided and slidably installed in the slide groove 112 .

[0077] In such an embodiment, two elastic members 12 are symmetrically arranged on both sides of the axis of the vehicle body to be tested to achieve stable support for the vehicle body to be tested. By adjusting the position of the elastic member 12 in the slide slot 112, the support points of different vehicle bodies to be tested or the support points required by different test objectives can be adapted.

[0078] In an exemplary embodiment, Figure 4-Figure 7 As shown, the transport device 3 includes a translation assembly 31, and the carrying assembly 1 is removably mounted on the translation assembly 31. The translation assembly 31 is configured to reciprocate along the length direction to transport the carrying assembly 1 carrying the vehicle body to be tested to the bottom of the lifting assembly 2, and move the vehicle body to be tested out of the test area after the test is completed.

[0079] In the embodiment of the present disclosure, the translation assembly 31 includes a transport trolley 311 and a trolley track 312. The transport trolley 311 includes a transport platform and wheels mounted on the lower surface of the transport platform through a connecting rod. Figure 4 and Figure 7 As shown, two wheels are respectively arranged on both sides of the transport trolley 311, and the two wheels are connected by a connecting rod extending along the length direction. The trolley track 312 is also arranged on the ground or on the test equipment table, and extends along the length direction, and is arranged between the two connecting rods of the transport trolley 311, and abuts against the connecting rods in the width direction to guide the transport trolley 311 to reciprocate along the length direction.

[0080] In some other exemplary embodiments, Figure 4 As shown, the surface of the transport platform of the transport trolley 311 is formed with a mounting groove, and the bearing plate 11 is embedded in the mounting groove. More specifically, the mounting groove is a through groove extending in the width direction, and the bearing plate 11 can be fixed in the mounting groove by friction, or by bolts and nuts.

[0081] Figure 8 yes Figure 2 An enlarged view of a portion of an exemplary embodiment is shown.

[0082] According to the embodiments of the present disclosure, Figure 4-Figure 8 As shown, the transport device 3 also includes a lifting assembly 32, which is configured to lift the load-bearing assembly 1 and the vehicle body to be tested to a preset height in response to the load-bearing assembly 1 being transported to the bottom of the lifting assembly 2 by the translation assembly 31, so as to allow the load-bearing assembly 1 to be suspended and connected with the lifting assembly 2; and in response to the load-bearing assembly 1 being disconnected from the lifting assembly 2, the load-bearing assembly 1 is lowered onto the translation assembly 31, so as to allow the translation assembly 31 to move the load-bearing assembly 1 carrying the vehicle body to be tested out of the test area.

[0083] In such an implementation, after the translation assembly 31 transports the load-bearing assembly 1 to the bottom of the hoisting assembly 2, the lifting assembly 32 lifts the load-bearing assembly 1. After the load-bearing assembly 1 is connected to the hoisting assembly 2, the lifting assembly 32 is lowered to avoid interference with the load-bearing assembly 1 and the vehicle body to be tested, so as to perform a modal test. After the test is completed, the lifting assembly 32 is raised to the point where it can lift the load-bearing assembly 1, the connection between the load-bearing assembly 1 and the hoisting assembly 2 is released, and the lifting assembly 32 supports the load-bearing assembly 1 to slowly descend, so that the load-bearing assembly 1 returns to the translation assembly 31 to withdraw from the test area.

[0084] Further according to an embodiment of the present disclosure, the lifting components 32 are arranged in pairs facing each other in the width direction, each lifting component 32 includes a lifting portion 321 and a support platform 322, the lifting portion 321 is configured to be lifted and lowered in the height direction, the support platform 322 is slidably installed on the lifting component 2 and supported on the lifting portion 321, and there is a spacing between the paired lifting components 32, which is configured to allow the translation component 31 to move and allow the supporting plate 11 to be placed on the two support platforms 322.

[0085] In such an implementation, Figure 8 As shown, the support platform 322 is connected to the hoisting assembly 2 by sliding, such as a sliding groove. The support platform 322 is fixedly connected to the lifting part 321. When the lifting part 321 is lifted and lowered in the height direction, the support platform 322 moves synchronously with the lifting part 321. More specifically, the lifting part 321 includes but is not limited to using a cylinder, a hydraulic cylinder or an electric push rod. The support platform 322 extends in the width direction. The distance between the two support platforms 322 is greater than the width of the translation assembly 31, that is, the width of the transport trolley 311, and less than the width of the load-bearing plate 11, so that when lifting and lowering in the height direction, the load-bearing plate 11 can be lifted or lowered without affecting the translation assembly 31.

[0086] It should be noted here that when the lifting portion 321 is at the lowest height, the upper surface of the lifting portion 321 should not be higher than the upper surface of the transport trolley 311 (that is, the lower surface of the supporting plate 11), and is preferably lower than the upper surface of the transport trolley 311 to avoid being affected during the movement of the transport trolley 311 along the length direction.

[0087] In an exemplary embodiment, two groups of bearing assemblies 1 are provided to support the two ends of the vehicle body to be tested along the length direction. The hoisting assemblies 2 are also provided in two pairs facing each other in the width direction, and are hoisted and matched with each group of bearing assemblies 1 respectively.

[0088] In this embodiment, two sets of bearing components 1 are provided to support the front and rear ends of the vehicle body to be tested, which has sufficient stability and can minimize the interference with the vehicle body to be tested during the test. Each pair of lifting components 2 is arranged facing each other in the width direction, and each pair of lifting components 2 includes two sets of facing lifting brackets, each set includes at least one lifting bracket (such as Figure 1 As shown). Further, two pairs of hoisting assemblies 2 are provided in the length direction, and are also provided at the front and rear ends of the vehicle body to be tested, so as to hoist the corresponding bearing assembly 1.

[0089] In an exemplary embodiment, the rail vehicle modal test equipment also includes two second stop portions 5, which are arranged at both ends of the vehicle body to be tested along the length direction, and are suitable for limiting the movement range of the vehicle body to be tested in the length direction during the test of the vehicle body to be tested, and allowing the transportation device 3 and the vehicle body to be tested to pass through the second stop portions 5 before and after the test.

[0090] In such an embodiment, when the vehicle body to be tested is subjected to a large displacement after being subjected to external excitation, since the vehicle body to be tested is only placed on the load-bearing component 1 without any fixing measures, it may tilt or even fall, and the lifting component 2 may be damaged. By setting the second stop portion 5 to limit the movement range of the vehicle body to be tested in the length direction, the test can be carried out safely.

[0091] In the embodiments of the present disclosure, Figure 8 As shown, the second stopper 5 includes a stop frame 51 and a baffle 52, and the baffle 52 is rotatably or detachably mounted on the stop frame 51. When the translation assembly 31 needs to transport or remove the bearing assembly 1 and the vehicle body to be tested, the baffle 52 is rotated to an open state, or the baffle 52 is removed to allow the bearing assembly 1 and the vehicle body to be tested to pass through the stop frame 51. When performing a modal test, the baffle 52 is rotated to a closed state, or the baffle 52 is mounted on the stop frame 51, and the baffle 52 is used to limit the moving range of the vehicle body to be tested in the length direction.

[0092] In some other embodiments, a buffer column 113 extending along the length direction is provided on the supporting plate 11. When the supporting component 1 undergoes a large displacement along with the vehicle body to be tested, the collision between the buffer column 113 and the baffle 52 prevents the supporting component 1 and the vehicle body to be tested from continuing to move, thereby reducing the damage caused by the direct collision between the vehicle body to be tested and the baffle 52.

[0093] More specifically, the buffer column 113 can be made of a material with a certain elastic coefficient, such as rubber. The buffer column 113 can also be a shock absorber with variable damping.

[0094] According to the embodiment of the present disclosure, the second stopper 5 can reciprocate along the length direction to meet different test requirements.

[0095] In such an embodiment, in the face of different movement ranges caused by different excitations and different lengths of the vehicle body to be measured, the second stopper 5 can slide along the length direction to adjust its position to meet the above requirements.

[0096] Specifically, the stop frame 51 can slide back and forth along the length direction through a stop frame slide groove arranged on the ground or the test equipment table. To simplify the layout, the stop frame 51 can also share the column slide groove with the column 211 of the lifting assembly 2.

[0097] In some other embodiments, the rail vehicle modal testing equipment also includes a control system, including but not limited to controlling the load-bearing component 1, the transportation device 3 or the second stop portion 5, such as the stiffness of the elastic member 12, the position of the translation component 31 or the position of the lifting component 32.

[0098] In an exemplary embodiment of the present disclosure, the working process of the rail vehicle modal test equipment is as follows:

[0099] Place two transport carts 311 on the cart track 312, and control the transport carts 311 to move and adjust their positions.

[0100] The bearing assembly 1 is mounted on the transport trolley 311 , the air spring is switched to a no-load state, and the vehicle body to be tested is placed on the air spring.

[0101] The position of the second stopper 5 is adjusted, and the baffle 51 is opened. The transport trolley 311 is controlled to move so that the transport trolley 311 and the bearing assembly 1 are moved to the test area.

[0102] The lifting part 321 is controlled to lift the bearing assembly 1 together with the vehicle body to be tested to a certain height, and the transport trolley 311 is controlled to withdraw from under the vehicle body to be tested.

[0103] Arrange the sensor on the vehicle body to be tested, close the baffle 51, and adjust the position of the stop frame 52 again. When the buffer column 113 is a variable damping shock absorber, adjust the damping value.

[0104] The lifting part 321 is controlled to lift the bearing assembly 1 together with the vehicle body to be tested to a required height for the test, the bearing plate 11 is hung on the hoisting cable 22 , and the lifting part 321 is controlled to descend to be separated from the bearing plate 11 .

[0105] The air spring is inflated until the stiffness meets the test requirements. The height position of the first stopper 4 is finely adjusted.

[0106] Conducting modal tests on rail vehicles.

[0107] After the test is finished, the air spring is controlled to be deflated, and the lifting part 321 rises to lift the carrying plate 11 .

[0108] The connection between the load-bearing plate 11 and the hoisting cable 22 is released. The baffle 51 is opened again, and the transport trolley 311 is controlled to move to the position directly below the load-bearing plate 11.

[0109] The lifting part 321 is controlled to descend until the carrying assembly 1 and the vehicle body to be tested are completely supported by the transport trolley 311 .

[0110] Control the transport trolley 311 to move and withdraw from the test area.

[0111] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0112] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A rail vehicle modal test equipment, characterized in that: include: A load-bearing assembly (1), adapted to bear a vehicle body to be tested of a rail vehicle located in a test area; Lifting assembly (2); as well as The transport device (3) is adapted to transport the bearing assembly (1) carrying the vehicle body to be tested to the test area, so as to lift the bearing assembly (1) by the lifting assembly (2) so that the vehicle body to be tested has degrees of freedom in the width direction and the length direction, and to move the vehicle body to be tested out of the test area after the test is completed; wherein the bearing assembly (1) is configured to provide the vehicle body to be tested with degrees of freedom in the height direction in the lifted state so as to perform a modal test on the vehicle body to be tested.

2. The rail vehicle modal test equipment according to claim 1, characterized in that: The bearing assembly (1) comprises: A load-bearing plate (11) suspended below the hanging assembly (2); An elastic member (12) is mounted on the bearing plate (11) and supported on the bottom of the vehicle body to be tested, so as to reduce the resistance of the vehicle body to be tested when it moves in the height direction.

3. The rail vehicle modal test equipment according to claim 2, characterized in that: The elastic member (12) comprises an air spring, and the air spring is configured to be in an airless no-load state in response to the vehicle body to be tested being transported to the test area, and to be in an inflated state filled with at least a portion of gas in response to the vehicle body to be tested being subjected to a modal test.

4. The rail vehicle modal test equipment according to claim 2, characterized in that: The hoisting assembly (2) comprises: Two sets of hanging brackets (21) are arranged on both sides of the vehicle body to be tested along the width direction; A plurality of lifting cables (22) extend downwards respectively from the two groups of lifting brackets (21); the lifting cables (22) suspend the bearing plate (11) between the two groups of lifting brackets (21) via the lifting points (111) located on the bearing plate (11).

5. The rail vehicle modal test equipment according to claim 4, characterized in that: Each set of the hanging brackets (21) comprises: Column (211); A cross bar (212) is slidably mounted on the side wall of the column (211) along the height direction and extends to the top of the bearing plate (11) along the width direction. The hoisting cable (22) extends downward from the cross bar (212) to hoist the bearing plate (11) between the two columns (211).

6. The rail vehicle modal test equipment according to claim 5, characterized in that: A first stopper (4) which can slide back and forth along the height direction is installed on the side wall of the column (211) facing the vehicle body to be tested, and is suitable for limiting the movement range of the vehicle body to be tested in the width direction.

7. The rail vehicle modal test equipment according to claim 2, characterized in that: The bearing plate (11) is provided with a slide groove (112) extending along the width direction, and two elastic members (12) are provided and slidably installed in the slide groove (112).

8. The rail vehicle modal test equipment according to claim 1, characterized in that: The transport device (3) comprises: A translation assembly (31), the bearing assembly (1) being removably mounted on the translation assembly (31), the translation assembly (31) being configured to reciprocate along the length direction so as to transport the bearing assembly (1) bearing the vehicle body to be tested to below the hoisting assembly (2), and to move the vehicle body to be tested out of the test area after the test is completed.

9. The rail vehicle modal test equipment according to claim 8, characterized in that: The transport device (3) further comprises: The lifting assembly (32) is configured to, in response to the bearing assembly (1) being transported by the translation assembly (31) to the bottom of the hanging assembly (2), lift the bearing assembly (1) and the vehicle body to be tested to a preset height, so as to allow the bearing assembly (1) to be suspended and connected to the hanging assembly (2); and in response to the bearing assembly (1) being disconnected from the hanging assembly (2), carry the bearing assembly (1) down to the translation assembly (31), so as to allow the translation assembly (31) to move the bearing assembly (1) carrying the vehicle body to be tested out of the test area.

10. The rail vehicle modal test equipment according to claim 9, characterized in that: The lifting assemblies (32) are arranged in pairs facing each other in the width direction, and each lifting assembly (32) comprises: A lifting part (321) is configured to be lifted and lowered along the height direction; and A support platform (322) is slidably mounted on the hoisting assembly (2) and supported on the lifting portion (321); a distance is provided between the paired lifting assemblies (32), and the distance is configured to allow the translation assembly (31) to move and to allow the bearing plate (11) to be mounted on the two support platforms (322).

11. The rail vehicle modal test equipment according to any one of claims 1 to 10, characterized in that: The bearing components (1) are provided in two groups, respectively supporting the two ends of the vehicle body to be tested along the length direction; the hoisting components (2) are also provided in two pairs facing each other in the width direction, respectively hoisting and cooperating with each group of the bearing components (1).

12. The rail vehicle modal test equipment according to any one of claims 1 to 10, characterized in that: It also comprises two second stoppers (5) arranged at both ends of the vehicle body to be tested along the length direction, and adapted to limit the range of movement of the vehicle body to be tested in the length direction during testing of the vehicle body to be tested, and to allow the transport device (3) and the vehicle body to be tested to pass through the second stoppers (5) before and after the test.

13. The rail vehicle modal test equipment according to claim 12, characterized in that: The second stopper (5) can reciprocate along the length direction to meet different test requirements.

Images