A model support device suitable for high-speed ground effect wind tunnel test

Abstract

The application provides a model support device suitable for high-speed ground effect wind tunnel test, which comprises a model mounting plate, a ground effect track, two variable height and angle components, a balance support rod and two air leakage baffles; the model mounting plate is connected with a wind tunnel bending knife; the ground effect track is arranged on the upper side of the model mounting plate; the two variable height and angle components are respectively arranged on the two sides of the ground effect track, the off-track height of the balance support rod is adjusted by simultaneously changing the height of the variable height pieces in the two variable height and angle components, so as to adjust the off-track height of the test model; the balance support rod is a T-shaped hollow structure, the posture of the balance support rod is adjusted by simultaneously changing the inclination angle of the close-fitting surface between the variable angle pieces and the corresponding convex parts in the two variable height and angle components, so as to adjust the posture of the test model. The application can solve the problems of insufficient rigidity, large blockage ratio and poor height and posture adjustment accuracy of the model support mode in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind tunnel test equipment, in particular to a model support device suitable for high-speed ground effect wind tunnel test. BACKGROUND

[0002] Wheel-rail type is the mainstream of current rail transit technology system, but due to the limitations of air resistance, wheel-rail adhesion, running noise and other problems, it is difficult to economically realize a substantial increase in operating speed under the existing technical level. In order to meet the demand for higher economic operating speed, on the basis of reducing wheel-rail friction and vibration by using magnetic suspension technology, constructing a low-vacuum operating environment to reduce air resistance and noise is an important direction for the development of higher-speed rail transit technology in the future, and low-vacuum tube aircraft emerges as the times require. Wind tunnel test is an important means to obtain the aerodynamic characteristics of low-vacuum tube aircraft.

[0003] In wind tunnel test, the aircraft model (hereinafter referred to as model) needs to make attitudes and actions such as pitch, yaw, roll, lateral translation and longitudinal translation frequently. In order to realize the above attitudes and actions, the model must be supported in the wind tunnel by a support system, which is commonly known as a wind tunnel model support device. In wind tunnel test, common model support methods include belly support, tail support, back support and wire tension support. In different types of wind tunnel test, different support methods will be used according to specific circumstances, and these different support methods have their own characteristics and advantages.

[0004] Unlike general ground effect tests of automobiles, trains and aircraft, high-speed ground effect wind tunnel tests of tube aircraft face problems such as large model size, large aerodynamic load, small wall / ground air gap, high assembly precision requirement, etc., which result in problems such as insufficient stiffness of the balance support system and large blockage ratio; in addition, the aerodynamic characteristics of the model are sensitive to changes in ground clearance and attack angle, and the support system is required to accurately adjust the model height and attitude, especially to realize the special ground effect test requirement of adjusting the attitude of the model at a specified height. At present, the traditional model support method cannot solve the above problems and requirements. SUMMARY

[0005] To solve one of the above technical problems, the present application provides a model support device suitable for high-speed ground effect wind tunnel test, which can solve the technical problems of insufficient stiffness, large blockage ratio and poor model height and attitude adjustment accuracy of the model support method in the prior art.

[0006] The present application provides a model support device suitable for high-speed ground effect wind tunnel test, which comprises a model mounting plate, a ground effect track, two variable height and angle assemblies, a balance support rod and two air release baffles.

[0007] The model mounting plate is connected with a wind tunnel bender;

[0008] The ground effect track is arranged on the upper side of the model mounting plate; the ground effect track comprises a track body, a first side wall plate and a second side wall plate; the track body is in a U shape, the first side wall plate is arranged in a first groove on the first side wall of the track body; the second side wall plate is arranged in a second groove on the second side wall of the track body, the second groove is arranged opposite to the first groove; the first side wall plate is provided with a first through hole; the second side wall plate is provided with a second through hole;

[0009] Two variable height and angle assemblies are arranged on the two sides of the ground effect track respectively; each variable height and angle assembly comprises an upper clamp plate, a lower clamp plate, a variable height piece, a variable angle piece, a first connecting piece, a second connecting piece and a third connecting piece; the lower clamp plate is connected with the side wall of the model mounting plate through the first connecting piece; the upper clamp plate is arranged directly above the lower clamp plate; the upper clamp plate is provided with a third through hole; the variable height piece is arranged between the upper clamp plate and the lower clamp plate; the upper clamp plate, the variable height piece and the lower clamp plate are connected through the second connecting piece; the variable angle piece is connected with the upper clamp plate through the third connecting piece; the height of the variable height piece in the two variable height and angle assemblies is simultaneously changed to adjust the height of the balance support rod, so as to adjust the height of the test model;

[0010] The balance support rod is in a T-shaped hollow structure; the balance support rod is connected with the test model through a balance; the end face of the first end of the horizontal structure of the balance support rod is provided with a first protruding part, and the end face of the second end is provided with a second protruding part; the first end of the horizontal structure of the balance support rod passes through the first through hole; the first protruding part tightly abuts against the variable angle piece through the third through hole of the first variable height and angle assembly; the second end of the horizontal structure of the balance support rod passes through the second through hole; the second protruding part tightly abuts against the variable angle piece through the third through hole of the second variable height and angle assembly; the inclination angle of the tightly abutting face between the variable angle piece and the corresponding protruding part in the two variable height and angle assemblies is simultaneously changed to adjust the posture of the balance support rod, so as to adjust the posture of the test model;

[0011] The first air leakage baffle is connected with the first side wall plate to realize the sealing between the first side wall plate and the first end of the horizontal structure of the balance support rod; the second air leakage baffle is connected with the second side wall plate to realize the sealing between the second side wall plate and the second end of the horizontal structure of the balance support rod.

[0012] Preferably, the upper clamping plate has a third protruding part in the middle of the lower end surface, and both sides of the lower end surface of the upper clamping plate have a first extension section in the horizontal direction, each of which has a first connecting hole; the lower clamping plate has a recessed part in the middle of the upper end surface, which is matched with the third protruding part, and both sides of the upper end surface of the lower clamping plate have a second extension section in the horizontal direction, each of which has a second connecting hole; the variable-height piece is arranged between the first extension section and the second extension section, and has a fourth through hole; the first connecting piece passes through the second connecting hole, the fourth through hole and the first connecting hole in sequence to realize the connection of the lower clamping plate, the variable-height piece and the upper clamping plate; wherein the thickness of the variable-height piece is determined according to the test requirements of the test model.

[0013] Preferably, the first protruding part and the second protruding part are both semicircular structures, and the variable-height piece is a right-angled trapezoidal structure, the side plane of each semicircular structure is closely attached to the hypotenuse of the corresponding right-angled trapezoidal structure, wherein the inclination angle of the hypotenuse of the right-angled trapezoidal structure is determined according to the test requirements of the test model.

[0014] Preferably, the device further comprises a reinforcing longitudinal girder arranged on the lower side of the model mounting plate.

[0015] Preferably, the device further comprises a wiring groove arranged on the side wall of the model mounting plate.

[0016] Preferably, the first end of the balance is inserted into the cavity of the longitudinal structure of the balance support rod and connected with the balance support rod, and the second end of the balance is connected with the test model.

[0017] Preferably, the first connecting piece, the second connecting piece and the third connecting piece are all bolts.

[0018] The technical scheme of the application adopts the variable-height and variable-angle assembly to avoid the continuous movement of the balance support rod with the variable-attack-angle mechanism of the wind tunnel, thereby meeting the requirement of changing the model posture at a specified height for high-speed ground effect test; the variable-height and variable-angle assembly is positioned and locked with the assembly surface positioning hole of the balance support rod, thereby achieving accurate height and angle and avoiding repeated assembly and adjustment. The T-shaped balance support rod achieves lateral support of the test model, the main structure of the T-shaped balance support rod is arranged in the test model, thereby avoiding the problem of obvious increase of the blockage ratio during model posture adjustment and avoiding the interference with the flow in the tail region and the near region of the model to the greatest extent; meanwhile, the size limitation factor of the balance support rod is reduced, the bending and torsional stiffness of the balance support rod is improved under the premise of reducing the interference with the wall / ground air gap, the balance support rod can bear the test model with large aerodynamic load, and the wall / ground air gap is accurately controlled, thereby facilitating the posture and height stability of the model. In addition, the T-shaped balance support rod adopts a hollow structure, thereby solving the problem of difficult signal line wiring. The support device of the application has simple and reliable structure and can be widely applied to high-speed ground effect test of ducted aircraft. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is readily apparent to one skilled in the art that the following figures are only some embodiments of the application and other figures can be obtained from the figures without any creative effort.

[0020] Figure 1 A perspective view of the model support device suitable for high-speed ground effect wind tunnel test is shown according to an embodiment of the application;

[0021] Figure 2 A front view of the support device in Figure 1 is shown;

[0022] Figure 3 An exploded view of the support device in Figure 1 is shown;

[0023] Figure 4 A perspective view of the balance support rod in Figure 1 is shown;

[0024] Figure 5 A perspective view of the balance in Figure 1 is shown;

[0025] Figure 6 An assembly view of the balance support rod and the balance in Figure 1 is shown;

[0026] Figure 7 a schematic view showing the ground effect track in Figure 1 ;

[0027] Figure 8 a schematic view showing the variable height and angle assembly in Figure 1 ;

[0028] Figure 9 a schematic view showing the assembly of the variable height and angle assembly and the balance support rod in Figure 1 ;

[0029] Figure 10 a schematic view showing the structure of the deflation baffle in Figure 1 .

[0030] Wherein, the above drawings include the following reference signs:

[0031] 10, model mounting plate;

[0032] 20, ground effect track; 21, track body; 22, first side wall plate; 23, second side wall plate;

[0033] 30, variable height and angle assembly; 31, upper clamp plate; 32, lower clamp plate; 33, variable height piece; 34, variable angle piece; 35, first connecting piece; 36, second connecting piece; 37, third connecting piece;

[0034] 40, balance support rod;

[0035] 50, deflation baffle;

[0036] 60, reinforced longitudinal girder;

[0037] 70, wiring groove;

[0038] 80, balance. DETAILED DESCRIPTION

[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0041] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but are to be considered as part of the description. In all examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the disclosure, and thus, once defined, do not need to be further discussed.

[0042] As shown in Figures 1-10 The present application provides a model support device for high-speed ground effect wind tunnel test, which comprises a model mounting plate 10, a ground effect track 20, two height and angle changing assemblies 30, a balance support rod 40 and two air release baffles 50.

[0043] The model mounting plate 10 is connected with a wind tunnel bending knife.

[0044] The ground effect track 20 is arranged on the upper side of the model mounting plate 10; the ground effect track 20 comprises a track body 21, a first side wall plate 22 and a second side wall plate 23; the track body 21 is in a U shape, the first side wall of the track body 21 is provided with a first recess, and the first side wall plate 22 is arranged in the first recess; the second side wall of the track body 21 is provided with a second recess arranged opposite to the first recess, and the second side wall plate 23 is arranged in the second recess; the first side wall plate 22 is provided with a first through hole; and the second side wall plate 23 is provided with a second through hole.

[0045] Two variable height and angle assemblies 30 are arranged on both sides of the ground effect track 20, each of the variable height and angle assemblies 30 comprises an upper clamping plate 31, a lower clamping plate 32, a variable height plate 33, a variable angle plate 34, a first connecting piece 35, a second connecting piece 36 and a third connecting piece 37, the lower clamping plate 32 is connected with the side wall of the model mounting plate 10 through the first connecting piece 35, the upper clamping plate 31 is arranged directly above the lower clamping plate 32, the upper clamping plate 31 has a third through hole, the variable height plate 33 is arranged between the upper clamping plate 31 and the lower clamping plate 32, the upper clamping plate 31, the variable height plate 33 and the lower clamping plate 32 are connected through the second connecting piece 36, the variable angle plate 34 is connected with the upper clamping plate 31 through the third connecting piece 37, the height of the variable height plate 33 in the two variable height and angle assemblies 30 is changed at the same time to adjust the height of the balance support rod 40, so as to adjust the height of the test model;

[0046] The balance support rod 40 is a T-shaped hollow structure, the balance support rod 40 is connected with the test model through a balance 80, the end face of the first end of the horizontal structure of the balance support rod 40 has a first protruding part, and the end face of the second end has a second protruding part, the first end of the horizontal structure of the balance support rod 40 passes through the first through hole, the first protruding part passes through the third through hole of the first variable height and angle assembly 30 and is closely attached to the variable angle plate 34, the second end of the horizontal structure of the balance support rod 40 passes through the second through hole, the second protruding part passes through the third through hole of the second variable height and angle assembly 30 and is closely attached to the variable angle plate 34, the inclination angle of the closely attached surface of the variable angle plate 34 and the corresponding protruding part in the two variable height and angle assemblies 30 is changed at the same time to adjust the posture of the balance support rod 40, so as to adjust the posture of the test model;

[0047] The first air leakage baffle 50 is connected with the first side wall plate 22 to realize the sealing between the first side wall plate 22 and the first end of the horizontal structure of the balance support rod 40, and the second air leakage baffle 50 is connected with the second side wall plate 23 to realize the sealing between the second side wall plate 23 and the second end of the horizontal structure of the balance support rod 40.

[0048] The application adopts the variable height and variable angle assembly 30 to avoid the continuous movement of the balance support rod 40 with the variable attack angle mechanism of the wind tunnel, thereby achieving the requirement of changing the model posture at a specified height in the high-speed ground effect test; the assembly surface positioning hole of the variable height and variable angle assembly 30 and the balance support rod 40 is aligned and locked, thereby achieving accurate height and angle, and avoiding repeated assembly adjustment. The T-shaped balance support rod 40 achieves lateral support of the test model, the main structure of the T-shaped balance support rod 40 is built-in the test model, thereby avoiding the problem of obvious increase of the blockage ratio in the model posture adjustment process, and avoiding the interference to the model wake area and the near area flow to the maximum extent; meanwhile, the size limitation factor of the balance support rod 40 is reduced, the bending and torsional stiffness of the balance support rod 40 is improved under the premise of reducing the wall / ground air gap interference, the balance support rod 40 can bear the large aerodynamic load test model, and the wall / ground air gap is accurately controlled, thereby facilitating the model posture and height stability. In addition, the T-shaped balance support rod 40 adopts a hollow structure, thereby solving the signal line wiring difficulty problem. The support device of the application has simple and reliable structure, and can be widely applied to the high-speed ground effect test of the ducted aircraft.

[0049] In the application, the T-shaped balance support rod 40 can be integrally processed by a three-dimensional numerical control machine, the hollow part of the transverse structure is a signal line wiring channel, and the inner side of the longitudinal structure is processed into a conical assembly surface for assembling the balance 80, as shown in Figures 4-6 .

[0050] In the application, in order to facilitate the installation of the T-shaped balance support rod 40, the ground effect track 20 is designed as a split structure; meanwhile, in order to facilitate its own processing, the ground effect track 20 is provided as multiple segments along the length direction, as shown in Figure 7 .

[0051] According to an embodiment of the application, as shown in Figure 8 and Figure 9 , the lower end surface of the upper clamping plate 31 has a third protruding part in the middle, both sides of the lower end surface of the upper clamping plate 31 have a first extension segment in the horizontal direction, each of the first extension segments has a first connecting hole; the upper end surface of the lower clamping plate 32 has a recessed part matched with the third protruding part in the middle, both sides of the upper end surface of the lower clamping plate 32 have a second extension segment in the horizontal direction, each of the second extension segments has a second connecting hole; the variable height piece 33 is arranged between the first extension segment and the second extension segment, and has a fourth through hole; the first connecting piece 35 passes through the second connecting hole, the fourth through hole and the first connecting hole in sequence to realize the connection of the lower clamping plate 32, the variable height piece 33 and the upper clamping plate 31; wherein the thickness of the variable height piece 33 is determined according to the test requirement of the test model.

[0052] In the above embodiment, the third protruding part and the recessed part are matched to realize the limiting effect between the upper clamping plate 31 and the lower clamping plate 32, so that the relative movement between the upper clamping plate 31 and the lower clamping plate 32 is only in the up-down direction, and the relative movement in the left-right direction or the front-rear direction is not generated.

[0053] According to an embodiment of the present application, as shown in Figure 4 The first protruding part and the second protruding part are both semicircular structures, and the variable-height piece 33 is a right-angled trapezoidal structure. The side plane of each semicircular structure is tightly fitted with the oblique side of the corresponding right-angled trapezoidal structure. The inclination angle of the oblique side of the right-angled trapezoidal structure is determined according to the test requirements of the test model.

[0054] In the above embodiment, the inclination angle of the oblique side of the variable-height piece 33, that is, the assembly plane slope of the first protruding part of the balance support rod 40 and the variable-height piece 33, is changed to adjust the posture of the balance support rod 40, so as to adjust the posture of the test model.

[0055] According to an embodiment of the present application, in order to improve the strength of the support device, the device further comprises a reinforcing longitudinal girder 60 arranged on the lower side of the model mounting plate 10.

[0056] According to an embodiment of the present application, the device further comprises a wiring slot 70 arranged on the side wall of the model mounting plate 10. In the process of the wind tunnel test, the signal line of the sensor is led out through the middle passage of the transverse structure of the balance support rod 40, and then is connected with the wind tunnel collection system by penetrating into the wiring slot 70.

[0057] According to an embodiment of the present application, the first end of the balance 80 penetrates into the cavity of the longitudinal structure of the balance support rod 40 and is connected with the balance support rod 40, and the second end of the balance 80 is connected with the test model.

[0058] According to an embodiment of the present application, the first connecting piece 35, the second connecting piece 36 and the third connecting piece 37 are all bolts.

[0059] Specifically, as shown in Figure 8 The first connecting piece 35 can adopt four bolts, the second connecting piece 36 can adopt four bolts, and the third connecting piece 37 can adopt two bolts. Since the side wall upper end face of the ground effect track 20 has an outwardly protruding edge, the first connecting piece 35 is installed from bottom to top.

[0060] In order to have a clearer understanding of the technical features, objects and effects of the present application, the assembly method of the present application will be described in detail with reference to the drawings, which specifically includes the following steps:

[0061] Step one, the reinforcing longitudinal girder 60 is assembled on the lower side of the model mounting plate 10, and the tail ends of the two are assembled with the wind tunnel system bending knife to form a cantilever structure;

[0062] Step two, the track body 21 of the ground effect track 20 is assembled on the model mounting plate 10, and the first side wall plate 22 of the ground effect track 20 is assembled in the first groove;

[0063] Step three, on the same side of the installed first side wall plate 22, the variable height and angle assembly 30 is installed; the lower clamping plate 32 of the variable height and angle assembly 30 is assembled on the model mounting plate 10, then the variable height piece 33 is assembled on the lower clamping plate 32, the upper clamping plate 31 is assembled on the variable height piece 33, and the upper clamping plate 31, the lower clamping plate 32 and the variable height piece 33 are fastened with bolts;

[0064] Step four, the test model, the balance 80 and the balance support rod 40 are assembled, and the whole is lifted above the ground effect track 20, the semicircular structure protruding at the end of the balance support rod 40 is inserted into the through hole of the upper clamping plate 31, and soft pads are arranged between the test model and the ground effect track 20 for supporting the model, preliminary positioning and avoiding collision;

[0065] Step five, steps two to four are repeated to install the second side wall plate 23 and the variable height and angle assembly 30 on the same side, at this time, the test model has achieved the specified height and can rotate freely around the balance support rod 40;

[0066] Step six, the two air leakage baffles 50 are connected with the two side wall plates of the ground effect track 20 respectively, covering the gaps on the sides of the track to prevent a large amount of airflow from leaking out of the sides of the track;

[0067] Step seven, the test model is adjusted to the vicinity of the predetermined attitude, first, the angle changing piece 34 is installed on the upper clamping plate 31 on one side of the track, the angle changing piece 34 is tightly fitted with the semicircular structure protruding at the end of the balance support rod 40, then the angle changing piece 34 and the upper clamping plate 31 are fastened with bolts, and then the above work is repeated on the other side to achieve accurate adjustment of the attitude of the model.

[0068] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0069] For purposes of the description hereinafter, spatial or directional terms, for example, "above", "below", "upper", "lower", and the like, can be used, and relate to the device as illustrated in the figures. However, it is to be understood that no absolute or relative orientation of the device is intended or implied, unless specifically described as such. Terms concerning attachments, coupling and the like, such as "connected" and "coupled" and the like, are to be construed in accordance with their normal meanings, that is, as referring to an indirect or direct connection or coupling. Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to". Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to".

[0070] In addition, it should be pointed out that the use of the terms "first", "second" and the like, to describe various elements, is merely intended to differentiate the elements from one another, and does not connote any special order or order of precedence, unless otherwise specifically indicated. Thus, the use of the terms "first", "second" and the like, is not intended to limit the scope of the present application, and is not intended to connote any special order or order of precedence.

[0071] The preferred embodiments herein disclosed are not intended to limit or restrict the scope of the application, but merely convey the best mode contemplated by the inventors of carrying out the claimed application. Any modifications, variations or changes within the spirit and scope of the application as disclosed herein will be considered to fall within the scope of the application.

Claims

1. A model support device suitable for high-speed ground effect wind tunnel testing, characterized in that: The device comprises a model mounting plate (10), a ground effect track (20), two height-variable angle components (30), a balance support rod (40) and two air-deflation baffles (50); The model mounting plate (10) is connected to the wind tunnel scimitar; The ground effect track (20) is arranged on the upper side of the model mounting plate (10); the ground effect track (20) comprises a track body (21), a first side wall plate (22) and a second side wall plate (23); the track body (21) is U-shaped, a first groove is provided on the first side wall of the track body (21), and the first side wall plate (22) is provided in the first groove; a second groove is provided on the second side wall of the track body (21) and is arranged opposite to the first groove, and the second side wall plate (23) is provided in the second groove; the first side wall plate (22) has a first through hole; the second side wall plate (23) has a second through hole; The two height-changing and angle-changing assemblies (30) are respectively arranged on both sides of the ground effect track (20), and each height-changing and angle-changing assembly (30) includes an upper clamping plate (31), a lower clamping plate (32), a height-changing piece (33), an angle-changing piece (34), a first connecting member (35), a second connecting member (36) and a third connecting member (37). The lower clamping plate (32) is connected to the side wall of the model mounting plate (10) through the first connecting member (35). The upper clamping plate (31) is arranged directly above the lower clamping plate (32). The upper clamping plate (3 1) having a third through hole, the height-changing piece (33) being arranged between the upper clamping plate (31) and the lower clamping plate (32), the upper clamping plate (31), the height-changing piece (33) and the lower clamping plate (32) being connected via the second connecting member (36), the angle-changing piece (34) being connected to the upper clamping plate (31) via the third connecting member (37), and adjusting the off-track height of the balance support rod (40) by simultaneously changing the height of the height-changing pieces (33) in the two height-changing and angle-changing assemblies (30), thereby adjusting the off-track height of the test model; The balance support rod (40) is a T-shaped hollow structure. The balance support rod (40) is connected to the test model through the balance (80). The end surface of the first end of the horizontal structure of the balance support rod (40) has a first protrusion, and the end surface of the second end has a second protrusion. The first end of the horizontal structure of the balance support rod (40) passes through the first through hole, and the first protrusion passes through the third through hole of the first variable height and variable angle component (30) and is tightly fitted with the variable angle piece (34). The second end of the horizontal structure of the balance support rod (40) passes through the second through hole, and the second protrusion passes through the third through hole of the second variable height and variable angle component (30) and is tightly fitted with the variable angle piece (34). The posture of the balance support rod (40) is adjusted by simultaneously changing the inclination angle of the tightly fitted surface of the variable angle piece (34) and the corresponding protrusion in the two variable height and variable angle components (30), thereby adjusting the posture of the test model. The first air-deflation baffle (50) is connected to the first side wall plate (22) and is used to achieve a seal between the first side wall plate (22) and the first end of the horizontal structure of the balance support rod (40); the second air-deflation baffle (50) is connected to the second side wall plate (23) and is used to achieve a seal between the second side wall plate (23) and the second end of the horizontal structure of the balance support rod (40); The device further comprises a reinforcing longitudinal girder (60), the reinforcing longitudinal girder (60) being arranged on the lower side of the model mounting plate (10); the device further comprises a wiring trough (70), the wiring trough (70) being arranged on the side wall of the model mounting plate (10).

2. The device according to claim 1, characterized in that The middle part of the lower end surface of the upper clamping plate (31) has a third protrusion, and both sides of the lower end surface of the upper clamping plate (31) have a first extension section along the horizontal direction, and each of the first extension sections has a first connecting hole; the middle part of the upper end surface of the lower clamping plate (32) has a recessed portion adapted to the third protrusion, and both sides of the upper end surface of the lower clamping plate (32) have a second extension section along the horizontal direction, and each of the second extension sections has a second connecting hole; the height-changing plate (33) is arranged between the first extension section and the second extension section, and the height-changing plate (33) has a fourth through hole; the first connecting member (35) passes through the second connecting hole, the fourth through hole and the first connecting hole in sequence to realize the connection between the lower clamping plate (32), the height-changing plate (33) and the upper clamping plate (31); wherein the thickness of the height-changing plate (33) is determined according to the test requirements of the test model.

3. The device according to claim 1 or 2, characterized in that The first protrusion and the second protrusion are both semicircular structures, the height-changing piece (33) is a right-angled trapezoidal structure, and the side plane of each semicircular structure is tightly fitted with the hypotenuse of the right-angled trapezoidal structure on the corresponding side, wherein the inclination angle of the hypotenuse of the right-angled trapezoidal structure is determined according to the test requirements of the test model.

4. The device according to claim 1, characterized in that The first end of the balance (80) penetrates into the cavity of the longitudinal structure of the balance support rod (40) and is connected to the balance support rod (40), and the second end of the balance (80) is connected to the test model.

5. The device according to claim 1 or 2, characterized in that The first connecting member (35), the second connecting member (36) and the third connecting member (37) are all bolts.

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