Segmental model system for wind tunnel test

Abstract

The invention relates to the technical field of wind tunnel tests, in particular to a segment model system for a wind tunnel test, which comprises two groups of inner elastic suspension systems, a segment model is connected between the inner elastic suspension systems, and an outer elastic suspension system is arranged on the outer side of each group of inner elastic suspension systems. The inner elastic suspension system can twist relative to the outer elastic suspension system and drive the outer elastic suspension system to vertically move; the vertical damping adjusting devices are arranged at the two ends of the outer elastic suspension system and used for providing adjustable vertical damping for the outer elastic suspension system; the torsional damping adjusting device is arranged between the inner elastic suspension system and the outer elastic suspension system and used for providing adjustable torsional damping for the inner elastic suspension system; the end connecting device is used for connecting the inner elastic suspension system and the outer elastic suspension system; and the limiting device is used for limiting the vertical movement of the outer elastic suspension system, so that the separation and combination of a vertical mode and a torsional mode and the independent adjustment of vertical damping and torsional damping are realized.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnel tests, and in particular to a segment model system for wind tunnel tests. Background Art

[0002] In recent years, with the continuous increase in main spans, bridge structural systems have become more flexible, their natural frequencies have decreased, structural damping has decreased, and their sensitivity to wind loads has significantly increased. Wind-induced vibration problems such as flutter and vortex-induced vibration of the main beam have become increasingly prominent. In order to ensure the structural safety and normal use of bridges during construction and operation, wind resistance studies are usually required during the design stage.

[0003] The damage caused by bridge flutter is mainly manifested as structural failure dominated by the torsional modal instability of the main beam, and the participation of the vertical mode is the key factor in the occurrence of flutter. Different from the structural instability caused by flutter, the vortex-induced vibration of the bridge main beam is mainly manifested as limited motion under the first-order or multi-order main beam mode. Its direct damage to the structural system is relatively light, but it may cause structural fatigue problems. In addition, vortex-induced vibration will also affect the driving sight distance and comfort, which will have an adverse impact on the normal operation of the bridge.

[0004] At present, the segment model wind tunnel test is the main method to study the vortex vibration and flutter performance of bridge main beams. However, the traditional segment model system cannot directly separate the vertical and torsional modes, nor can it independently adjust the vertical and torsional damping. Therefore, the traditional segment model system is difficult to meet the needs of studying the vertical and torsional vortex vibration modal interference and flutter performance of the main beam under the influence of factors such as damping. Summary of the invention

[0005] The purpose of the present invention is to provide a segment model system for wind tunnel testing in view of the problem that the traditional segment model system in the background technology cannot directly separate the vertical and torsional modes, and cannot independently adjust the vertical and torsional damping.

[0006] The present invention provides a segment model system for wind tunnel testing, comprising:

[0007] Two sets of internal elastic suspension systems are arranged opposite to each other, a segment model is connected between the internal elastic suspension systems, and an external elastic suspension system is also arranged outside each set of internal elastic suspension systems, and the internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically;

[0008] A vertical damping adjustment device, arranged at both ends of the external elastic suspension system, for providing adjustable vertical damping for the external elastic suspension system;

[0009] a torsional damping adjustment device, arranged between the inner elastic suspension system and the outer elastic suspension system, for providing adjustable torsional damping for the inner elastic suspension system;

[0010] an end connection device for connecting the inner elastic suspension system and the outer elastic suspension system;

[0011] It also includes a limiting device for limiting the vertical movement of the external elastic suspension system.

[0012] The segment model system of the present application includes two groups of relatively arranged internal elastic suspension systems, with segment models connected between the internal elastic suspension systems, and an external elastic suspension system is also provided on the outside of each group of internal elastic suspension systems. The internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically. When used in a wind tunnel test, the segment model can achieve coordinated movement of vertical and torsional modes. Furthermore, the internal elastic suspension system and the external elastic suspension system are connected by an end connection device, thereby limiting the torsion of the internal elastic suspension system relative to the external elastic suspension system, so that the segment model system can achieve independent vertical movement of the segment model. Furthermore, the vertical movement of the external elastic suspension system is limited by a limiting device, so that the segment model system can achieve independent torsional movement of the segment model. The segment model system of the present application, through the cooperation of the end connection device and the limiting device By use, independent or coordinated movement of vertical and torsional modes can be realized; further, it also includes vertical damping adjustment devices arranged at both ends of the external elastic suspension system, and the vertical damping adjustment device provides adjustable vertical damping for the external elastic suspension system; it also includes a torsional damping adjustment device arranged between the internal elastic suspension system and the external elastic suspension system, and the torsional damping adjustment device provides adjustable torsional damping for the internal elastic suspension system. Through the vertical damping adjustment device and the torsional damping adjustment device, independent adjustment of the vertical and torsional damping of the segment model system can be achieved, and then the vertical and torsional damping of the segment model system can be adjusted separately or synchronously. The segment model system of the present application breaks through the limitations of the traditional segment model elastic suspension system, realizes the direct separation and combination of vertical and torsional modes, and independent adjustment of the vertical and torsional damping of the system, providing new technical support for vortex vibration and flutter research.

[0013] Preferably, the inner elastic suspension system comprises an inner suspension end plate, the outer elastic suspension system comprises an outer suspension end plate, and the inner suspension end plate and the outer suspension end plate are located at the same height;

[0014] The segment model comprises a model end plate, wherein a central axis is arranged inside the model end plate along the length direction of the model end plate, and both ends of the central axis extend to the outside of the model end plate;

[0015] The model end plate is bolted to the inner suspension end plate, the inner suspension end plate is provided with a first central circular hole, and the end of the central axis passes through the first central circular hole;

[0016] It also includes a rotation support shaft, which is rotatably arranged in the central shaft, and both ends of the rotation support shaft extend to the outside of the central shaft and are fixedly connected to the outer suspension end plate.

[0017] The model end plate is bolted to the inner suspension end plate, so that the model end plate and the inner suspension end plate are connected as a whole, so that when conducting a wind tunnel test, the model end plate drives the inner suspension end plate to move together after being affected by wind. Furthermore, the rotating support shaft is rotatably arranged in the central axis, and both ends of the rotating support shaft extend to the outside of the central axis and are fixedly connected to the outer suspension end plate, so that the rotating support shaft and the central axis can achieve relative rotation, even if the inner suspension end plate can be twisted relative to the outer suspension end plate.

[0018] Preferably, an articulated bearing is installed in the end of the central shaft, and the outer ring of the articulated bearing abuts against the inner wall of the central shaft;

[0019] The inner ring of the articulated bearing is sleeved on the rotating support shaft.

[0020] The rotating support shaft and the central shaft are connected by an articulated bearing. When the inner suspension end plate moves vertically, the inner suspension end plate can drive the outer suspension end plate to move together. Through the above-mentioned arrangement, the inner suspension end plate can not only twist relative to the outer suspension end plate, but also drive the outer suspension end plate to move vertically, so that the segment model system of the present application can realize the coordinated movement of vertical and torsional modes.

[0021] Preferably, the torsional damping adjustment device comprises a permanent magnet, a permanent magnet back iron, a conductor plate, a conductor plate back iron and a spacing adjustment block, the permanent magnet back iron is connected to a side of the inner suspension end plate close to the outer suspension end plate, and the permanent magnet is connected to the permanent magnet back iron;

[0022] The side of the outer suspension end plate close to the inner suspension end plate is detachably connected to the spacing adjustment block, the conductor plate back iron is connected to the spacing adjustment block, and the conductor plate is connected to the conductor plate back iron.

[0023] The distance between the conductor plate and the permanent magnet is adjusted by adjusting the thickness of the distance adjustment block, thereby adjusting the size of the torsional damping.

[0024] Preferably, the rotation support shaft sequentially passes through the spacing adjustment block, the conductor plate back iron and the conductor plate and the center;

[0025] A second central circular hole is provided on the permanent magnet back iron, the aperture of the second central circular hole is larger than the outer diameter of the rotating support shaft, and the rotating support shaft penetrates through the second central circular hole and then enters into the central shaft.

[0026] Preferably, the vertical damping adjustment device comprises a permanent magnet, a permanent magnet back iron, a conductor plate, a conductor plate back iron and a movable base, the permanent magnet back iron is connected to a side of the outer suspension end plate away from the inner suspension end plate, and the permanent magnet is connected to the permanent magnet back iron;

[0027] The conductor plate back iron is arranged relative to the permanent magnet back iron, the conductor plate is connected to the conductor plate back iron, the bottom of the conductor plate back iron is connected to the movable base, and the movable base can drive the conductor plate back iron to approach or move away from the permanent magnet.

[0028] The base is moved to drive the conductor plate back iron to approach or move away from the permanent magnet, thereby adjusting the distance between the conductor plate and the permanent magnet, and further adjusting the size of the vertical damping.

[0029] Preferably, the movable base includes an optical axis rail, a ball screw, a slide and a bottom mold, the optical axis rail and the ball screw are horizontally installed on the bottom mold, the slide is sleeved on the optical axis rail and the ball screw, the ball screw is used to drive the slide to move, and the conductor plate back iron is connected to the top of the slide.

[0030] Preferably, the limiting device comprises a limiting track, a spherical contact piece and a limiting screw, the limiting track is vertically arranged on a side of the outer suspension end plate away from the inner suspension end plate, the limiting track has a slide groove inside, the spherical contact piece is located in the slide groove, and the outer suspension end plate is connected to the spherical contact piece;

[0031] The limit screw is slidably disposed in the slide groove, and the limit screw is used to clamp the spherical contact piece.

[0032] The external suspension end plate is connected to the spherical contact piece, which is located in the slide groove of the limiting track. The spherical contact piece is clamped by the limiting screw in the slide groove, thereby limiting the vertical movement of the external suspension end plate and realizing the separation of the torsional motion mode of the segment model system. The segment model system can only perform torsional motion but not vertical motion, so that the segment model system realizes a single torsional motion mode.

[0033] Preferably, the end connection device includes a connecting screw and an anti-dislocation connecting piece, and the two sides of the anti-dislocation connecting piece are respectively abutted against the inner suspension end plate and the outer suspension end plate, and the connecting screw connects the outer suspension end plate, the anti-dislocation connecting piece and the inner suspension end plate in sequence.

[0034] The outer suspension end plate and the inner suspension end plate are connected together by connecting screws and anti-dislocation connectors, thereby limiting the torsion of the inner suspension end plate relative to the outer suspension end plate, realizing the separation of the vertical motion mode of the segment model system. The segment model system can only perform vertical motion without torsional motion, thereby realizing a single vertical motion mode.

[0035] Preferably, the internal elastic suspension system further comprises a first suspension rod and a coil spring, and the internal suspension end plate is connected to the first suspension rod via the coil spring;

[0036] The external elastic suspension system further comprises a second suspension rod and a coil spring, and the external suspension end plate is connected to the second suspension rod through the coil spring;

[0037] Both ends of the limiting track are connected to the suspension rod of the external elastic suspension system through rigid connecting pieces.

[0038] Preferably, according to the design mass m and vertical frequency f of the segment model h , vertical damping ratio range (ξ h,min ,ξ h,max ), calculate the vertical damping coefficient adjustment range of the segment model system (c h,min ,c h,max ):

[0039] c h,min =2m·(2πf h )·ξ h,min ,

[0040] c h,max =2m·(2πf h )·ξ h,max ;

[0041] According to the design mass inertia moment I and torsional frequency f of the segment model t 、Torsional damping ratio range(ξ t,min ,ξ t,max ), calculate the adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max ):

[0042] c t,min =2I·(2πf t )·ξ t,min ,

[0043] c t,max =2I·(2πf t )·ξ t,max .

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The segment model system of the present application includes two groups of relatively arranged internal elastic suspension systems, with segment models connected between the internal elastic suspension systems, and an external elastic suspension system is also provided on the outside of each group of internal elastic suspension systems. The internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically. When used in a wind tunnel test, the segment model can achieve coordinated movement of vertical and torsional modes. Furthermore, the internal elastic suspension system and the external elastic suspension system are connected by an end connection device, thereby limiting the torsion of the internal elastic suspension system relative to the external elastic suspension system, so that the segment model system can achieve independent vertical movement of the segment model. Furthermore, the vertical movement of the external elastic suspension system is limited by a limiting device, so that the segment model system can achieve independent torsional movement of the segment model. The segment model system of the present application, through the cooperation of the end connection device and the limiting device By use, independent or coordinated movement of vertical and torsional modes can be realized; further, it also includes vertical damping adjustment devices arranged at both ends of the external elastic suspension system, and the vertical damping adjustment device provides adjustable vertical damping for the external elastic suspension system; it also includes a torsional damping adjustment device arranged between the internal elastic suspension system and the external elastic suspension system, and the torsional damping adjustment device provides adjustable torsional damping for the internal elastic suspension system. Through the vertical damping adjustment device and the torsional damping adjustment device, independent adjustment of the vertical and torsional damping of the segment model system can be achieved, and then the vertical and torsional damping of the segment model system can be adjusted separately or synchronously. The segment model system of the present application breaks through the limitations of the traditional segment model elastic suspension system, realizes the direct separation and combination of vertical and torsional modes, and independent adjustment of the vertical and torsional damping of the system, providing new technical support for vortex vibration and flutter research. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a three-dimensional schematic diagram of the segmental model system.

[0048] Figure 2 It is a three-dimensional schematic diagram of the vertical damping adjustment device.

[0049] Figure 3 It is the bottom support of the vertical damping adjustment device.

[0050] Figure 4 It is a three-dimensional schematic diagram of the internal elastic suspension system.

[0051] Figure 5 It is a three-dimensional schematic diagram of the torsional damping adjustment device.

[0052] Figure 6 It is a three-dimensional schematic diagram of the segment model.

[0053] Figure 7 It is a three-dimensional schematic diagram of the limit device.

[0054] Figure 8 It is a cross-sectional view of the connection between the limit track and the spherical contact.

[0055] Fig. 9 It is a top view of the inner and outer suspension end plates.

[0056] Markings in the figure:

[0057] 1-segment model, 2-model end plate, 3-center axis, 41-first suspension rod, 42-second suspension rod, 5-lifting ring, 6-spring buckle, 71-inner suspension end plate, 72-outer suspension end plate, 8-permanent magnet, 9-permanent magnet back iron, 10-conductor plate, 11-conductor plate back iron, 12-optical axis rail, 13-ball screw, 14-slide, 15-bottom support frame, 16-lateral connecting rod, 17-connecting screw, 18 anti-dislocation connector, 19-articulated bearing, 20-rotating support shaft, 21-limiting track, 22-rigid connector, 23-spherical contact, 24-limiting end rod, 25-limiting screw, 26-helical spring, 27-crank handle, 28-support angle steel, 29-spacing adjustment block, 30-bottom mold. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0059] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0060] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0061] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0062] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0063] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0064] Example 1

[0065] like Figure 1-Figure 9 As shown, a segment model system for wind tunnel testing comprises:

[0066] Two sets of internal elastic suspension systems are arranged opposite to each other, and a segment model 1 is connected between the internal elastic suspension systems. An external elastic suspension system is also arranged outside each set of internal elastic suspension systems, and the internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically;

[0067] A vertical damping adjustment device, arranged on a side of the outer elastic suspension system away from the inner elastic suspension system, for providing adjustable vertical damping for the outer elastic suspension system;

[0068] A torsional damping adjustment device, arranged between the inner elastic suspension system and the outer elastic suspension system, for providing adjustable torsional damping for the inner elastic suspension system;

[0069] An end connection device for connecting the inner elastic suspension system and the outer elastic suspension system;

[0070] It also includes a limiting device for limiting the vertical movement of the external elastic suspension system.

[0071] The segment model system of the present embodiment comprises two groups of relatively arranged internal elastic suspension systems, a segment model 1 is connected between the internal elastic suspension systems, an external elastic suspension system is also arranged on the outside of each group of internal elastic suspension systems, the internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically, when applied in a wind tunnel test, the segment model 1 can achieve coordinated motion of vertical and torsional modes, further, the internal elastic suspension system and the external elastic suspension system are connected by an end connection device, thereby limiting the torsion of the internal elastic suspension system relative to the external elastic suspension system, so that the segment model system can achieve independent vertical motion of the segment model 1, further, the vertical movement of the external elastic suspension system is limited by a limiting device, so that the segment model system can achieve independent torsional motion of the segment model 1, the segment model system of the present embodiment, through the coordinated use of the end connection device and the limiting device, can achieve independent or coordinated motion of vertical and torsional modes, so that the segment model system has conversion adjustment of a single degree of freedom (vertical or torsional) and two degrees of freedom (vertical and torsional);

[0072] The segment model system of this embodiment also includes a vertical damping adjustment device arranged at both ends of the external elastic suspension system, and the vertical damping adjustment device provides adjustable vertical damping for the external elastic suspension system; it also includes a torsional damping adjustment device arranged between the internal elastic suspension system and the external elastic suspension system, and the torsional damping adjustment device provides adjustable torsional damping for the internal elastic suspension system. Through the vertical damping adjustment device and the torsional damping adjustment device, independent adjustment of the vertical and torsional damping of the segment model system is achieved, and then the vertical and torsional damping of the segment model system are adjusted separately or synchronously. The segment model system of this embodiment breaks through the limitations of the traditional segment model elastic suspension system, realizes the direct separation and combination of vertical and torsional modes, and independent adjustment of the vertical and torsional damping of the system, providing new technical support for vortex vibration and flutter research.

[0073] In one or more embodiments, Figure 1 As shown, the inner elastic suspension system includes an inner suspension end plate 71, and the outer elastic suspension system includes an outer suspension end plate 72, and the inner suspension end plate 71 and the outer suspension end plate 72 are located at the same height;

[0074] like Figure 6 As shown, the model end plate 2 is bolted to the inner suspension end plate 71, and a first central circular hole is provided on the inner suspension end plate 71. The end of the central axis 3 passes through the first central circular hole and extends out of the inner suspension end plate 71.

[0075] It also includes a rotating support shaft 20 , which is rotatably arranged in the central shaft 3 , and both ends of the rotating support shaft 20 extend to the outside of the central shaft 3 and are fixedly connected to the outer suspension end plate 72 .

[0076] Both ends of the model end plate 2 are bolted to the inner suspension end plate 71, so that the model end plate 2 and the inner suspension end plate 71 are connected as a whole, so that when the wind tunnel test is carried out, the model end plate 2 drives the inner suspension end plate 71 to move together after being affected by the wind. Furthermore, the rotating support shaft 20 is rotatably arranged in the central axis 3, and both ends of the rotating support shaft 20 extend to the outside of the central axis 3 and are fixedly connected to the outer suspension end plate 72, so that the rotating support shaft 20 and the central axis 3 can achieve relative rotation. Even if the inner suspension end plate 71 can be twisted relative to the outer suspension end plate 72,

[0077] In an optional embodiment, if Figure 4 As shown, an articulated bearing 19 is installed in the end of the central shaft 3, and the outer ring of the articulated bearing 19 abuts against the inner wall of the central shaft 3;

[0078] The inner ring of the articulated bearing 19 is sleeved on the rotating support shaft 20 .

[0079] The rotating support shaft 20 and the central shaft 3 are connected by an articulated bearing 19. When the inner suspension end plate 71 moves vertically, the inner suspension end plate 71 can drive the outer suspension end plate 72 to move together. Through the above-mentioned arrangement, the inner suspension end plate 71 can not only be twisted relative to the outer suspension end plate 72, but the inner suspension end plate 71 can also drive the outer suspension end plate 72 to move vertically, so that the segment model system of this embodiment can realize the coordinated movement of vertical and torsional modes.

[0080] In an optional embodiment, if Figure 6 As shown, the central axis 3 is located at the center of the end of the model end plate 2, which helps to evenly distribute the load, reduce the stress and vibration caused by the eccentric load, improve stability, and avoid additional torque caused by asymmetry.

[0081] A first center circular hole is provided on the inner suspension end plate 71 , the center axis 3 passes through the first center circular hole and extends out of the inner suspension end plate 71 , the rotating support axis 20 passes through the center axis 3 , and both ends of the rotating support axis 20 are respectively fixed at the centers of the two outer suspension end plates 72 .

[0082] In this embodiment, both ends of the model end plate 2 are bolted to the inner suspension end plate 71, and the central axis 3 passes through the inner suspension end plate 71. When the wind attack angle needs to be adjusted, the bolts of the model end plate 2 and the inner suspension end plate 71 are removed, and then the model end plate 2 is rotated appropriately so that the model end plate 2 can be rotated relative to the inner suspension end plate 71. After the angle of attack is adjusted, the model end plate 2 and the inner suspension end plate 71 are bolted together by bolts.

[0083] In one or more embodiments, Figure 1 , Figure 4 As shown, the internal elastic suspension system also includes a first suspension rod 41, a suspension ring 5, a spring buckle 6 and a coil spring 26, wherein the first suspension rod 41 is provided in the upper and lower regions of the internal suspension end plate 71, the internal suspension end plate 71 is connected to the coil spring 26 through the spring buckle 6, and the coil spring 26 is connected to the first suspension rod 41 through the spring buckle 6 and the suspension ring 5, further, two coil springs 26 are connected to the upper part of the internal suspension end plate 71, and two coil springs 26 are also connected to the lower part of the internal suspension end plate 71, and the internal suspension end plate 71 is suspended between the first suspension rod 41 through four coil springs 26;

[0084] The external elastic suspension system also includes a second suspension rod 42, a coil spring 26, a suspension ring 5, a spring buckle 6 and a coil spring 26, wherein the second suspension rod 42 is provided in the upper and lower regions of the external suspension end plate 72, the external suspension end plate 72 is connected to the coil spring 26 through the spring buckle 6, and the coil spring 26 is connected to the second suspension rod 42 through the spring buckle 6 and the suspension ring 5, further, two coil springs 26 are connected to the upper part of the external suspension end plate 72, and two coil springs 26 are also connected to the lower part of the external suspension end plate 72, and the external suspension end plate 72 is suspended between the second suspension rod 42 through four coil springs 26;

[0085] The first suspension rod 41 and the second suspension rod 42 are both connected to the upper and lower fixed boundaries of the wind tunnel.

[0086] The internal elastic suspension system provides torsional stiffness for the segment model system, and the internal and external elastic suspension systems together provide vertical stiffness for the segment model system.

[0087] In an optional implementation, the torsional damping adjustment device and the vertical damping adjustment device are both permanent magnet plate type eddy current dampers.

[0088] In one or more embodiments, Figure 5 As shown, the torsional damping adjustment device includes a permanent magnet 8, a permanent magnet back iron 9, a conductor plate 10, a conductor plate back iron 11 and a spacing adjustment block 29, the permanent magnet back iron 9 is connected to a side of the inner suspension end plate 71 close to the outer suspension end plate 72, and the permanent magnet 8 is connected to the permanent magnet back iron 9;

[0089] One side of the outer suspension end plate 72 close to the inner suspension end plate 71 is detachably connected to the spacing adjustment block 29 , the conductor plate back iron 11 is connected to the spacing adjustment block 29 , and the conductor plate 10 is connected to the conductor plate back iron 11 .

[0090] The thickness of the spacing adjustment block 29 is adjusted to adjust the spacing between the conductor plate 10 and the permanent magnet 8, thereby adjusting the size of the torsional damping. When in use, a plurality of spacing adjustment blocks 29 of different thicknesses are set, inserted into corresponding positions, and then fixed to the outer suspension end plate 72 by a long bolt rod. The material used for the spacing adjustment block 29 can be a lightweight wooden block or other light-weight and high-strength materials.

[0091] In an optional embodiment, if Figure 5 As shown, the torsional damping adjustment device is arranged at the center of the inner suspension end plate 71 and the outer suspension end plate 72, the rotating support shaft 20 passes through the spacing adjustment block 29, the conductor plate back iron 11 and the center of the conductor plate 10 in sequence, and a second center circular hole is provided on the permanent magnet back iron 9, the aperture of the second center circular hole is larger than the outer diameter of the rotating support shaft 20, and the second center circular hole can allow the rotating support shaft 20 to pass through without contacting it, the permanent magnet 8 is fixed to the permanent magnet back iron 9 by non-magnetic bolts, and the conductor plate 10, the conductor plate back iron 11 and the spacing adjustment block 29 are connected together in sequence by bolts and fixed to the inner center position of the outer suspension end plate 72;

[0092] The permanent magnets 8 are arranged at intervals along the circumferential direction of the rotating support shaft 20, and the number of the permanent magnets 8 is not less than four;

[0093] In one or more embodiments, Figure 1 , Figure 2 As shown, the vertical damping adjustment device includes a permanent magnet 8, a permanent magnet back iron 9, a conductor plate 10, a conductor plate back iron 11 and a movable base, the permanent magnet back iron 9 is connected to a side of the outer suspension end plate 72 away from the inner suspension end plate 71, and the permanent magnet 8 is connected to the permanent magnet back iron 9;

[0094] The conductor plate back iron 11 is arranged relative to the permanent magnet back iron 9 , the conductor plate 10 is connected to the conductor plate back iron 11 , and the bottom of the conductor plate back iron 11 is connected to a movable base, which can drive the conductor plate back iron 11 to approach or move away from the permanent magnet 8 .

[0095] The base is moved to drive the conductor plate back iron 11 to approach or move away from the permanent magnet 8, thereby adjusting the distance between the conductor plate 10 and the permanent magnet 8, and further adjusting the magnitude of the vertical damping.

[0096] In an optional embodiment, if Figure 2As shown, the vertical damping adjustment device is arranged at both ends of the outer suspension end plate 72, that is, permanent magnet back irons 9 are installed at both ends of the outer suspension end plate 72, and then a conductor plate back iron 11 is arranged relative to the permanent magnet back iron 9, a permanent magnet 8 is arranged on the permanent magnet back iron 9, and a conductor plate 10 is arranged on the side of the conductor plate back iron 11 close to the permanent magnet 8, and a movable base is arranged at the bottom of the conductor plate back iron 11.

[0097] In an optional embodiment, if Figure 2 As shown, the movable base includes an optical axis rail 12, a ball screw 13, a slide 14 and a bottom mold 30. The optical axis rail 12 and the ball screw 13 are horizontally installed on the bottom mold 30. The slide 14 is sleeved on the optical axis rail 12 and the ball screw 13. The ball screw 13 is used to drive the slide 14 to move. The conductor plate back iron 11 is connected to the top of the slide 14.

[0098] Among them, the number of optical axis rails 12 is not less than two, and the optical axis rails 12 provide sliding support for the slide 14. The slide 14 is driven to move by rotating the ball screw 13. When the slide 14 moves, the conductor plate back iron 11 is driven to move, thereby adjusting the distance between the conductor plate 10 and the permanent magnet 8;

[0099] Furthermore, the permanent magnet 8 is fixed to the permanent magnet back iron 9 by non-magnetic bolts, the conductor plate 10 and the conductor plate back iron 11 are fixed together by bolts, and the conductor plate back iron 11 is fixed to the slide 14 by the support angle steel 28;

[0100] Furthermore, a crank 27 is provided at the end of the ball screw 13 , and the ball screw 13 is driven to rotate by rotating the crank 27 .

[0101] In an optional embodiment, the bottom mold 30 is installed on the bottom support frame 15, and the bottom support frame 15 is connected to the limiting track 21 of the limiting device through the lateral connecting rod 16.

[0102] In one or more embodiments, Figure 1 , Figure 7 As shown, the limiting device includes a limiting rail 21, a spherical contact member 23 and a limiting screw 25. The limiting rail 21 is vertically arranged on a side of the outer suspension end plate 72 away from the inner suspension end plate 71. The limiting rail 21 has a slide groove inside, and the spherical contact member 23 is located in the slide groove. The outer suspension end plate 72 is connected to the spherical contact member 23.

[0103] The limit screw 25 is slidably disposed in the slide groove, and the limit screw 25 is used to clamp the spherical contact member 23 .

[0104] The outer hanging end plate 72 is connected to the spherical contact member 23. The spherical contact member 23 is located in the slide groove of the limit track 21. The spherical contact member 23 is clamped by the limit screw 25 in the slide groove, thereby limiting the vertical movement of the outer hanging end plate 72, realizing the separation of the torsional motion mode of the segment model system, and can only do torsional motion but not vertical motion, so that the segment model system realizes a single torsional motion mode;

[0105] Furthermore, the limiting track 21 can limit the torsional movement of the outer suspension end plate 72 of the outer elastic suspension system. During the test, due to the friction of the articulated bearing 19, the relative rotation of the inner elastic suspension system will add a torsional torque to the outer elastic suspension system, which can easily cause the outer suspension end plate 72 to torsion. In addition, the model under the wind is prone to horizontal lateral displacement along the wind direction, thereby causing the coil spring 26 of the outer elastic suspension system to tilt horizontally to a certain extent, which is not conducive to the stability of the system. In order to overcome the above shortcomings, the outer suspension end plate 72 is connected to the spherical contact member 23 through the limiting end rod 24. The spherical contact member 23 is located in the slide groove of the limiting track 21, so that the cooperation between the spherical contact member 23 and the slide groove can limit the torsion and horizontal lateral displacement of the outer suspension end plate 72.

[0106] In an optional embodiment, the outer suspension end plate 72 is connected to the spherical contact member 23 via a limiting end rod 24 .

[0107] In an optional embodiment, the number of the limiting rails 21 on each side of the segment model system is two, wherein at least one spherical contact member 23 is installed on each limiting rail 21, and the spherical contact member 23 is evenly connected to the external suspension end plate 72.

[0108] In one or more embodiments, Fig. 9 As shown, the end connection device includes a connecting screw 17 and an anti-dislocation connecting piece 18. The two sides of the anti-dislocation connecting piece 18 are respectively abutted against the inner suspension end plate 71 and the outer suspension end plate 72. The connecting screw 17 connects the outer suspension end plate 72, the anti-dislocation connecting piece 18 and the inner suspension end plate 71 in sequence.

[0109] The outer suspension end plate 72 and the inner suspension end plate 71 are connected together by connecting the screw 17 and the anti-dislocation connector 18, thereby limiting the torsion of the inner suspension end plate 71 relative to the outer suspension end plate 72, thereby realizing the separation of the vertical motion mode of the segment model system. The segment model system can only perform vertical motion without torsional motion, thereby realizing a single vertical motion mode.

[0110] In this embodiment, the end connection device can be arranged in the middle area of ​​the inner and outer suspension end plates, or can be arranged on both sides of the inner and outer suspension end plates.

[0111] In one or more embodiments, Figure 1As shown, the internal elastic suspension system further includes a first suspension rod 41 and a coil spring 26, and the internal suspension end plate 71 is connected to the first suspension rod 41 through the coil spring 26;

[0112] The external elastic suspension system further includes a second suspension rod 42 and a coil spring 26, and the external suspension end plate 72 is connected to the second suspension rod 42 via the coil spring 26;

[0113] Both ends of the limiting track 21 are connected to the second suspension rod 42 of the external elastic suspension system through a rigid connecting piece 22 .

[0114] In this embodiment, the model end plate 2 and the central axis 3 constitute the basic skeleton of the segment model 1; the internal elastic suspension system provides torsional stiffness for the segment model system, and the internal and external elastic suspension systems together provide vertical stiffness for the segment model system; the torsional damping adjustment device only provides torsional damping for the segment model system, and the gap between the permanent magnet 8 and the conductor plate 10 can be changed by the thickness of the spacing adjustment block 29 to achieve accurate and continuous adjustment of the torsional damping size; the vertical damping adjustment device only provides vertical damping for the segment model system, and the gap between the permanent magnet 8 and the conductor plate 10 can be changed by moving the base to achieve accurate and continuous adjustment of the vertical damping size; the end connection device selects whether to limit the relative rotation of the suspension end plates of the inner and outer sets of elastic suspension systems by setting a connecting screw 17 and an anti-dislocation connector 18 at the gap position of the two sets of elastic suspension systems according to the test requirements for the motion mode of the segment model; the limiting device can limit the vertical movement of the outer suspension end plate 72 of the outer elastic suspension system by the fastening position of the limiting screw 25 in the limiting track 21.

[0115] Example 2

[0116] Based on Example 1, this example discloses a workflow of a segment model system for wind tunnel testing, which is as follows:

[0117] (1) Determine the motion modes (vertical motion, torsional motion, and (vertical and torsional) two-degree-of-freedom motion) that the segment model system needs to have in the wind tunnel test according to the research objectives;

[0118] (2) Design the segment model system according to the motion mode and dynamic characteristic parameters (mass, damping, frequency) required by the segment model system. The design method of the segment model system under different motion modes is as follows:

[0119] (I) Single degree of freedom vertical motion

[0120] 1) According to the design mass m and vertical frequency f of segment model 1 h , calculate the total vertical stiffness K of the segment model system h ;

[0121] K h=m·(2πf h ) 2 (1)

[0122] The design mass m of the segment model 1 is the total mass involved in the vertical vibration of the segment model system, which includes the mass of the inner and outer suspension end plates and their attached components, the mass of the segment model 1, and about 1 / 3 of the total mass of the coil spring 26.

[0123] 2) According to the total vertical stiffness K of the segment model system h Distribute the total vertical stiffness K of the internal and external elastic suspension systems 1,h and K 2,h ;

[0124] K 1,h =λ h K h (2)

[0125] K 2,h =(1-λ h )K h (3)

[0126] In the formula, λ h is the total vertical stiffness distribution coefficient of the internal elastic suspension system.

[0127] 3) According to the total vertical stiffness K of the internal and external elastic suspension systems 1,h and K 2,h Calculate the stiffness k of the single coil spring 26 of the internal and external elastic suspension system 1,h and k 2,h ;

[0128] k 1,h =K 1,h / 8 (4)

[0129] k 2,h =K 2,h / 8 (5)

[0130] 4) According to the stiffness k of the single coil spring 26 of the internal and external elastic suspension system 1,h and k 2,h , and spring stiffness calculation formula (6), design and process the spring, and determine the design parameters of the spring;

[0131]

[0132] Where k is the stiffness of the designed spring, G is the shear modulus, d is the diameter of the spring wire, D is the mean diameter of the spring coil, and n is the number of effective coils.

[0133] 5) According to the design mass m and vertical frequency f of the segment model h , vertical damping ratio range (ξh,min ,ξ h,max ), calculate the vertical damping coefficient adjustment range of the segment model system (c h,min ,c h,max );

[0134] c h,min =2m·(2πf h )·ξ h,min (7)

[0135] c h,max =2m·(2πf h )·ξ h,max (8)

[0136] 6) According to the calculated vertical damping coefficient adjustment range (c h,min ,c h,max ), ignoring the initial vertical damping coefficient of the system (usually small), design a system that can provide (c h,min ,c h,max ) range of vertical damping coefficients, requiring stable performance and reasonable spacing adjustment range;

[0137] 7) Construct a segment model elastic suspension system according to the connection relationship of each component, wherein a connecting screw 17 and an anti-dislocation connector 18 are arranged at the gap position of the inner and outer sets of elastic suspension systems to limit the relative rotation of the suspension end plates of the inner and outer sets of elastic suspension systems, and the fastening position of the limiting screw 25 in the limiting track 21 does not limit the vertical movement of the outer suspension end plate 72 of the outer elastic suspension system.

[0138] (II) Single degree of freedom torsional motion

[0139] 1) According to the design mass inertia moment I and torsional frequency f of segment model 1 t , calculate the total torsional stiffness K of the segment model system t ;

[0140] K t =I·(2πf t ) 2 (9)

[0141] Among them, the design mass moment of inertia I of the segment model 1 is the total mass moment of inertia (about the center axis of the model) involved in torsional vibration in the segment model system, which is the total mass moment of inertia including the mass moment of inertia of the inner suspension end plate 71 and its attached components, the mass moment of inertia of the segment model 1, and approximately 1 / 3 of the coil spring 26 (connected to the inner suspension end plate 71).

[0142] 2) According to the total torsional stiffness K of the segment model system t Calculate the stiffness k of a single coil spring 26 of the internal elastic suspension system1,t ;

[0143] k 1,t =K t / (2l 1,t 2 ) (10)

[0144] In the formula, l 1,t is the spring spacing on the same side of the internal elastic suspension system.

[0145] 3) Single coil spring of external elastic suspension system 26 stiffness k 2,t Spacing l between springs on the same side 2,t You can select or cancel the spring of the external elastic suspension system at will. The recommended values ​​are:

[0146] k 2,t =k 1,t (11)

[0147] l 2,t = l 1,t (12)

[0148] 4) According to the stiffness k of the single coil spring 26 of the internal and external elastic suspension system 1,t and k 2,t , and spring stiffness calculation formula (6), design and process the spring;

[0149] 5) According to the design mass inertia moment I and torsional frequency f of segment model 1 t 、Torsional damping ratio range(ξ t,min ,ξ t,max ), calculate the adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max );

[0150] c t,min =2I·(2πf t )·ξ t,min (13)

[0151] c t,max =2I·(2πf t )·ξ t,max (14)

[0152] 6) According to the calculated adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max ), ignoring the initial torsional damping coefficient of the system (usually small), design a system that can provide (c t,min ,c t,max ) The plate-type eddy current damper with a torsional damping coefficient within a certain range is required to have stable performance and a reasonable spacing adjustment range;

[0153] 7) Build a segment model elastic suspension system according to the connection relationship of each component, wherein the inner and outer sets of elastic suspension system suspension end plates can rotate relative to each other, and the fastening position of the limit screw 25 in the limit track 21 clamps the spherical contact part 23 to limit the vertical movement of the outer suspension end plate 72 of the outer elastic suspension system.

[0154] (III) Two-degree-of-freedom vertical and torsional motion

[0155] 1) According to the design mass inertia moment I and torsional frequency f of segment model 1 t , calculate the total torsional stiffness K of the segment model system t ′;

[0156] K t ′=I·(2πf t ) 2 (15)

[0157] 2) According to the total torsional stiffness K of the segment model system t Calculate the stiffness k of a single coil spring 26 of the internal elastic suspension system 1,t ;

[0158] k 1,t =K t ′ / (2l 1,t 2 ) (16)

[0159] In the formula, l 1,t is the spring spacing on the same side of the internal elastic suspension system.

[0160] 3) According to the design mass m and vertical frequency f of segment model 1 h , calculate the total vertical stiffness K′ of the segment model system h ;

[0161] K′h=m·(2πfh) 2 (17)

[0162] 4) According to the total vertical stiffness K′ of the segment model system h Calculate the total vertical stiffness K′ of the external elastic suspension system 2,h ;

[0163] K′ 2,h =K′ h -8k 1,t (18)

[0164] 5) According to the total vertical stiffness K′ of the external elastic suspension system 2,h Calculate the stiffness k of the single coil spring 26 of the external elastic suspension system 2,h ;

[0165] k 2,h =K′ 2,h / 8 (19)

[0166] 3) Spacing l of the same-side helical springs 26 of the external elastic suspension system 2,t You can choose any value, here are the recommended values:

[0167] l2,t=l1,t (20)

[0168] 4) According to the stiffness k of the single coil spring 26 of the inner and outer elastic suspension systems 1,t and k 2,h , and spring stiffness calculation formula (6), design and process the spring;

[0169] 5) According to the design mass inertia moment I and torsional frequency f of segment model 1 t 、Torsional damping ratio range(ξ t,min ,ξ t,max ), calculate the adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max );

[0170] c t,min =2I·(2πf t )·ξ t,min (twenty one)

[0171] c t,max =2I·(2πf t )·ξ t,max (twenty two)

[0172] 6) According to the design mass m and vertical frequency f of segment model 1 h , vertical damping ratio range (ξ h,min ,ξ h,max ), calculate the vertical damping coefficient adjustment range of the segment model system (c h,min ,c h,max );

[0173] c h,min =2m·(2πf h )·ξ h,min (twenty three)

[0174] c h,max =2m·(2πf h )·ξ h,max (twenty four)

[0175] 7) According to the calculated adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max), ignoring the initial torsional damping coefficient of the system, design a system that can provide (c t,min ,c t,max ) The plate-type eddy current damper with a torsional damping coefficient within a certain range is required to have stable performance and a reasonable spacing adjustment range;

[0176] 8) According to the calculated adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max ), ignoring the initial torsional damping coefficient of the system, design a system that can provide (c t,min ,c t,max ) The plate-type eddy current damper with a torsional damping coefficient within a certain range is required to have stable performance and a reasonable spacing adjustment range;

[0177] 9) Build a segment model elastic suspension system according to the connection relationship of each component, in which the suspension end plates of the inner and outer sets of elastic suspension systems can rotate relative to each other, cancel the restriction of the limiting screw 25 in the limiting track 21 on the spherical contact part 23, and the outer suspension end plate 72 of the outer elastic suspension system can move vertically.

[0178] (3) Adjust the constructed segment model system to conduct wind tunnel tests.

[0179] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A segment model system for wind tunnel testing, characterized in that: include: Two sets of internal elastic suspension systems are arranged opposite to each other, a segment model (1) is connected between the internal elastic suspension systems, and an external elastic suspension system is also arranged outside each set of internal elastic suspension systems, and the internal elastic suspension system can be twisted relative to the external elastic suspension system and drive the external elastic suspension system to move vertically; A vertical damping adjustment device, arranged at both ends of the external elastic suspension system, for providing adjustable vertical damping for the external elastic suspension system; a torsional damping adjustment device, arranged between the inner elastic suspension system and the outer elastic suspension system, for providing adjustable torsional damping for the inner elastic suspension system; an end connection device for connecting the inner elastic suspension system and the outer elastic suspension system; It also includes a limiting device for limiting the vertical movement of the external elastic suspension system.

2. A segment model system for wind tunnel testing according to claim 1, characterized in that: The inner elastic suspension system comprises an inner suspension end plate (71), and the outer elastic suspension system comprises an outer suspension end plate (72), wherein the inner suspension end plate (71) and the outer suspension end plate (72) are located at the same height; The segment model (1) comprises a model end plate (2), wherein a central axis (3) is provided inside the model end plate (2) along the length direction of the model end plate (2), and both ends of the central axis (3) extend to the outside of the model end plate (2); The model end plate (2) is bolted to the inner suspension end plate (71); a first central circular hole is provided on the inner suspension end plate (71); and the end of the central axis (3) passes through the first central circular hole; It also includes a rotating support shaft (20), which is rotatably arranged in the central shaft (3), and both ends of the rotating support shaft (20) extend to the outside of the central shaft (3) and are fixedly connected to the external suspension end plate (72).

3. A segment model system for wind tunnel testing according to claim 2, characterized in that: An articulated bearing (19) is installed in the end of the central shaft (3), and the outer ring of the articulated bearing (19) abuts against the inner wall of the central shaft (3); The inner ring of the hinge bearing (19) is sleeved on the rotating support shaft (20).

4. A segment model system for wind tunnel testing according to claim 3, characterized in that: The torsional damping adjustment device comprises a permanent magnet (8), a permanent magnet back iron (9), a conductor plate (10), a conductor plate back iron (11) and a spacing adjustment block (29), wherein the permanent magnet back iron (9) is connected to a side of the inner suspension end plate (71) close to the outer suspension end plate (72), and the permanent magnet (8) is connected to the permanent magnet back iron (9); The outer suspension end plate (72) is detachably connected to the spacing adjustment block (29) on one side close to the inner suspension end plate (71), the conductor plate back iron (11) is connected to the spacing adjustment block (29), and the conductor plate (10) is connected to the conductor plate back iron (11).

5. A segment model system for wind tunnel testing according to claim 4, characterized in that: The rotating support shaft (20) sequentially passes through the spacing adjustment block (29), the conductor plate back iron (11) and the center of the conductor plate (10); A second central circular hole is provided on the permanent magnet back iron (9), the diameter of the second central circular hole is larger than the outer diameter of the rotating support shaft (20), and the rotating support shaft (20) penetrates through the second central circular hole and then enters the central shaft (3).

6. A segment model system for wind tunnel testing according to claim 4, characterized in that: The vertical damping adjustment device comprises a permanent magnet (8), a permanent magnet back iron (9), a conductor plate (10), a conductor plate back iron (11) and a movable base, wherein the permanent magnet back iron (9) is connected to two ends of the outer suspension end plate (72), and the permanent magnet (8) is connected to the permanent magnet back iron (9); The conductor plate back iron (11) is arranged relative to the permanent magnet back iron (9), the conductor plate (10) is connected to the conductor plate back iron (11), and the bottom of the conductor plate back iron (11) is connected to the movable base, and the movable base can drive the conductor plate back iron (11) to approach or move away from the permanent magnet (8).

7. A segment model system for wind tunnel testing according to claim 6, characterized in that: The movable base comprises an optical axis rail (12), a ball screw (13), a slide (14) and a bottom mold (30); the optical axis rail (12) and the ball screw (13) are horizontally mounted on the bottom mold (30); the slide (14) is sleeved on the optical axis rail (12) and the ball screw (13); the ball screw (13) is used to drive the slide (14) to move; and the conductor plate back iron (11) is connected to the top of the slide (14).

8. A segment model system for wind tunnel testing according to claim 6, characterized in that: The limiting device comprises a limiting track (21), a spherical contact piece (23) and a limiting screw (25); the limiting track (21) is vertically arranged on a side of the outer suspension end plate (72) away from the inner suspension end plate (71); a slide groove is provided inside the limiting track (21); the spherical contact piece (23) is located in the slide groove; and the outer suspension end plate (72) is connected to the spherical contact piece (23); The limit screw (25) is slidably disposed in the slide groove, and the limit screw (25) is used to clamp the spherical contact piece (23).

9. A segment model system for wind tunnel testing according to claim 8, characterized in that: The end connection device comprises a connecting screw (17) and an anti-dislocation connecting piece (18), the two sides of the anti-dislocation connecting piece (18) are respectively abutted against the inner suspension end plate (71) and the outer suspension end plate (72), and the connecting screw (17) sequentially connects the outer suspension end plate (72), the anti-dislocation connecting piece (18) and the inner suspension end plate (71).

10. The segment model system for wind tunnel test according to claim 1, characterized in that: According to the design mass m and vertical frequency f of the segment model (1) h 、Vertical damping ratio range (ξ h,min ,ξ h,max ), calculate the vertical damping coefficient adjustment range of the segment model system (c h,min ,c h,max ): c h,min =2m·(2πf h )·ξ h,min , c h,max =2m·(2πf h )·ξ h,max ; According to the design mass inertia moment I and torsional frequency f of the segment model (1) t 、Torsional damping ratio range(ξ t,min ,ξ t,max ), calculate the adjustment range of the torsional damping coefficient of the segment model system (c t,min ,c t,max ): c t,min =2I·(2πf t )·ξ t,min , c t,max =2I·(2πf t )·ξ t,max 。

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