Integrated carbon fiber composite material damping filling sandwich structure raft frame and preparation method thereof

Abstract

The invention belongs to the technical field of vibration isolation, and particularly relates to an integrated carbon fiber composite material damping filling sandwich structure raft frame and a preparation method. The raft frame comprises two supporting plates and a support arranged between the two supporting plates. The supporting plate comprises an upper panel and a lower panel; the metal honeycomb interlayer is provided with a plurality of filling holes and is arranged between the upper panel and the lower panel; the surface of the whole supporting plate is made of the carbon fiber composite material, damping of the raft frame is increased, the middle layer is provided with the metal material, the rigidity of the raft frame is increased, and the damping effect of the raft frame is improved. Meanwhile, the filling holes of the metal honeycomb interlayer are filled with the damping material filling blocks, so that the overall weight of the raft frame is reduced, the damping of the raft frame is further increased, and the problems that in the prior art, a metal raft frame is small in damping, and a pure carbon fiber material raft frame is insufficient in rigidity, large in weight and limited in vibration reduction effect are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration isolation, and in particular relates to an integrated carbon fiber composite material damping-filled sandwich structure raft and a preparation method thereof. Background Art

[0002] Vibration isolation technology is an effective measure to control vibration and noise pollution. The raft is a structure between the power equipment and the hull, used to support the power equipment. The power equipment will generate vibration during operation, which will be transmitted to the hull through the raft.

[0003] As a structure on the vibration transmission path, the vibration reduction effect of the raft frame affects the stability of the hull's navigation. The existing raft frames are mainly made of metal materials. Metal materials are limited to low damping, their own vibration reduction effect is not obvious, and they are heavy. Due to the existence of the matrix, the damping of carbon fiber composite materials is better than that of metal materials. Some people have also developed carbon fiber composite raft frames, whose support plates are made of pure carbon fiber composite materials. The elastic modulus of carbon fiber composite materials is lower than that of metal materials. In order to obtain sufficient rigidity, the thickness of the pure carbon fiber composite material support plate is thicker than that of the metal support plate, and the weight reduction effect is not obvious. In addition, the existing raft frames mostly adopt a modular structure, and the components are connected by bolts. During long-term operation, loosening will occur, affecting the performance of the raft frame.

[0004] For the raft frame made of metal or pure carbon fiber composite materials in the prior art, the rigidity of metal is too large due to its heavy weight, and the damping force is relatively small, while the rigidity of pure carbon fiber composite materials is small and the rebound force is weak. Therefore, the vibration reduction effect of the raft frame is limited and it cannot be used in scenarios with high vibration reduction requirements. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of heavy weight and limited vibration reduction performance in the prior art, and to provide an integrated carbon fiber composite material damping filled sandwich structure raft frame and preparation method which cleverly combines damping materials, metals and carbon fiber composite materials to ensure stiffness, reduce weight and greatly improve vibration reduction effect.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] As a first aspect, an integrated carbon fiber composite material damping filled sandwich structure raft frame includes two support plates and a support disposed between the two support plates;

[0008] The support plate comprises:

[0009] upper and lower panels;

[0010] A metal honeycomb sandwich having a plurality of filling holes is arranged between the upper panel and the lower panel;

[0011] A plurality of damping material filling blocks having the same shape as the filling holes, wherein the damping material filling blocks are filled in the filling holes of the metal honeycomb sandwich;

[0012] The upper panel and the lower panel are both made of carbon fiber composite material prepreg, which is laid layer by layer and is cured and connected with the upper and lower surfaces of the metal honeycomb sandwich.

[0013] Furthermore, the support comprises:

[0014] A support body with a cavity therein; the support body is made of carbon fiber composite material;

[0015] A plurality of horizontal vibration-damping grooves are provided in the inner cavity of the support body along a horizontal plane;

[0016] A plurality of vertical vibration-damping grooves are evenly arranged on the outer peripheral surface of the support body along the vertical direction;

[0017] A damping material insert is installed in the vertical vibration-damping groove, and a damping material frame is installed in the horizontal vibration-damping groove.

[0018] Furthermore, the support body is one of a cube structure, a rectangular parallelepiped structure, and a cylindrical structure.

[0019] Furthermore, the damping material filling block is made of one or more materials selected from rubber and ethylene-vinyl acetate copolymer.

[0020] Furthermore, the metal honeycomb interlayer is made of aluminum alloy material or titanium alloy material.

[0021] Furthermore, the filling hole is a circular cavity structure or a polygonal cavity structure; the outer periphery of the damping material filling block is fixed to the inner wall of the filling hole by gluing.

[0022] As a second aspect, according to the method for preparing the above-mentioned integrated carbon fiber composite material damping filled sandwich structure raft, the method comprises the following steps:

[0023] S1. Set the size, shape and thickness of the support plate and the support;

[0024] S2. Prepare the support plate according to the support plate size, shape and thickness requirements set in step S1;

[0025] S3. Preparation of a carbon fiber composite support, that is, a carbon fiber composite material is molded to prepare a support body with a cavity inside, and a plurality of horizontal vibration-damping grooves are provided on the inner wall of the support body and a plurality of vertical vibration-damping grooves are evenly provided on the outer periphery of the support body;

[0026] S4. According to the shape and size of the horizontal vibration damping groove in step S3, a damping material frame matching therewith is prepared, and according to the shape and size of the vertical vibration damping groove in step S3, a damping material insert is prepared matching therewith; the damping material frame is placed in the corresponding horizontal vibration damping groove by means of pultrusion and rebound, and the damping material insert is placed in the corresponding vertical vibration damping groove by means of pultrusion and rebound;

[0027] S5. The two support plates prepared in step S2 and the support prepared in step S4 are subjected to secondary curing to form an initial raft structure;

[0028] S6. Post-process the initial raft structure after secondary curing and forming in step S5 to obtain an integrated raft.

[0029] Specifically, the preparation process of the support plate in step S2 includes the following steps:

[0030] S201. Preparing a carbon fiber composite material prepreg layer and cutting it into a set size;

[0031] S202. According to the setting in step S1, a metal honeycomb sandwich is prepared;

[0032] S203. Prepare matching damping material filling blocks according to the filling holes in the metal honeycomb interlayer;

[0033] S204. The outer peripheral surface of the damping material filling block and the inner wall of the filling hole are fixed to the metal honeycomb sandwich by gluing until the damping material filling block completely fills the metal honeycomb sandwich;

[0034] S205. Laying the plurality of cut carbon fiber composite material prepreg layers obtained in step S201 layer by layer on the upper and lower surfaces of the metal honeycomb sandwich according to the setting requirements in step S1 to form an upper panel and a lower panel;

[0035] S206. The laid support plate is cured and formed once, and the preparation of the support plate is completed.

[0036] Specifically, the one-step curing and molding includes: using a curing press to press the laid support plate; placing the pressed support plate together with the curing press into a curing furnace for heating and curing;

[0037] The secondary curing molding includes the following contents:

[0038] Adhesive is applied to the contact surfaces of the support and the two support plates, and they are fixed with adhesive accordingly;

[0039] The support plate and the support base are clamped by a curing fixture;

[0040] The clamped support plate and the support together with the curing fixture are placed in a curing furnace for heating and curing;

[0041] The curing temperatures of the primary curing molding and the secondary curing molding are both 120° C. to 150° C., and the curing times are both 2.5 h to 3.5 h.

[0042] Specifically, the post-processing in step S6 includes grinding and trimming the initial raft structure.

[0043] The beneficial effects of the one-piece carbon fiber composite material damping filled sandwich structure raft frame and the preparation method of the present invention are:

[0044] The support plate of the present invention is provided with upper and lower panels made of carbon fiber composite materials, and a metal honeycomb interlayer is arranged between the upper and lower panels, and damping material filling blocks are filled in several filling holes of the metal honeycomb interlayer to form a damping-filled interlayer structure, and the upper and lower panels made of carbon fiber composite materials, the metal honeycomb interlayer and the damping material filling blocks made of damping material are layered and fused, and the surface of the entire support plate is made of carbon fiber composite materials to increase the damping of the raft frame, and metal materials are arranged in the middle layer to increase the rigidity of the raft frame, and at the same time, the damping material filling blocks are filled into the filling holes of the metal honeycomb interlayer, so that the overall weight of the raft frame is reduced and the damping of the raft frame is further increased, thereby solving the problems in the prior art that the metal raft frame has low damping and high weight, and the pure carbon fiber material raft frame has insufficient rigidity and limited vibration reduction effect.

[0045] The support body of the support of the present invention is made of carbon fiber composite materials, and a plurality of horizontal vibration damping grooves and vertical vibration damping grooves are respectively arranged on the inner wall and the outer peripheral surface of the support body, and a damping material insert is installed in the vertical vibration damping groove, and a damping material frame is installed in the horizontal vibration damping groove. On the basis of the damping performance of the support body, the damping material insert and the damping material frame are arranged, and vibration damping grooves are respectively opened on the outside and the inside of the support body, and the damping material is filled in the vibration damping grooves. In the process of vibration transmission, more vibration energy can be dissipated, and the vibration damping effect is better, so that the damping performance of the entire raft frame is greatly improved. That is, compared with the raft frame in the prior art, the damping force of the raft frame of the present invention is significantly increased, which greatly improves the vibration damping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] Figure 1 It is a stereoscopic view of the integrated carbon fiber composite material damping filled sandwich structure raft frame in the first embodiment of the present invention.

[0048] Figure 2 It is an exploded view of the support plate in the first embodiment of the present invention.

[0049] Figure 3 It is a schematic diagram of the structure of the metal honeycomb sandwich in Example 1 of the present invention.

[0050] Figure 4 yes Figure 3 Detail of point A in the middle.

[0051] Figure 5 It is a partial structural schematic diagram of the raft in the first embodiment of the present invention.

[0052] Figure 6 It is an exploded view of the support in the first embodiment of the present invention.

[0053] Figure 7 It is a flow chart of a method for preparing an integrated carbon fiber composite material damping-filled sandwich structure raft frame according to the third embodiment of the present invention.

[0054] Figure 8 It is a flow chart of the preparation of the support plate of the third embodiment of the present invention.

[0055] In the figure: 1. support plate, 11. upper panel, 12. lower panel, 13. metal honeycomb interlayer, 14. filling hole, 15. damping material filling block, 2. support, 21. support body, 22. horizontal vibration damping groove, 23. vertical vibration damping groove, 24. damping material insert, 25. damping material frame. DETAILED DESCRIPTION

[0056] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0057] Embodiment 1

[0058] like Figure 1-Figure 6 The specific embodiment of the one-piece carbon fiber composite damping filled sandwich structure raft of the present invention shown in the figure comprises two support plates 1 and a support 2 arranged between the two support plates 1. The support plate 1 comprises: an upper panel 11 and a lower panel 12, a metal honeycomb interlayer 13 having a plurality of filling holes 14, and a plurality of damping material filling blocks 15 having the same shape as the filling holes 14. The metal honeycomb interlayer 13 is arranged between the upper panel 11 and the lower panel 12, and the damping material filling blocks 15 are filled in the filling holes 14 of the metal honeycomb interlayer 13, wherein the upper panel 11 and the lower panel 12 are both made of carbon fiber composite material prepreg, which is laid layer by layer and cured and connected with the upper and lower surfaces of the metal honeycomb interlayer 13.

[0059] The integrated carbon fiber composite damping filled sandwich structure raft of the first embodiment includes two support plates 1 and a support 2 installed between the two support plates 1. The upper and lower support plates 1 are integrally carbon fiber composite damping filled aluminum honeycomb sandwich structures. The support plates 1 adopt a carbon fiber composite damping filled sandwich structure. The sandwich structure can obtain great rigidity when the upper panel 11 and the lower panel 12 are very thin. The upper panel 11 and the lower panel 12 are made of carbon fiber composite materials, and the sandwich core is a metal honeycomb sandwich core. Damping material is filled in the filling holes 14 of the metal honeycomb sandwich core to solve the shortcomings of the existing metal raft frame that the vibration reduction effect is not obvious and the pure carbon fiber composite material raft frame has insufficient rigidity.

[0060] Specifically, the support plate 1 of the present embodiment is provided with an upper panel 11 and a lower panel 12 made of carbon fiber composite materials, and a metal honeycomb interlayer 13 is arranged between the upper panel 11 and the lower panel 12, and damping material filling blocks 15 are filled in several filling holes 14 of the metal honeycomb interlayer 13 to form a damping-filled interlayer structure, and the upper and lower panels 12 made of carbon fiber composite materials, the metal honeycomb interlayer 13 and the damping material filling blocks 15 made of damping material are layered and fused, and the surface of the entire support plate 1 is made of carbon fiber composite materials to increase the damping of the raft frame, and metal materials are arranged in the middle layer to increase the stiffness of the raft frame. At the same time, the damping material filling blocks 15 are filled into the filling holes 14 of the metal honeycomb interlayer 13, which reduces the overall weight of the raft frame and further increases the damping of the raft frame, thereby solving the problems of low damping and heavy weight of metal raft frames and insufficient stiffness and limited vibration reduction effect of pure carbon fiber material raft frames in the prior art.

[0061] It should be noted that the damping material filling block 15 in the first embodiment is made of one or more of rubber or ethylene-vinyl acetate copolymer materials, and the carbon fiber composite material prepreg uses carbon fiber as reinforcement and epoxy resin as matrix. The carbon fiber and epoxy resin are made in a certain proportion. Those skilled in the art can prepare them according to the existing technology ratio, and the specific preparation process of the carbon fiber composite material prepreg will not be described in detail here.

[0062] The metal honeycomb interlayer 13 in the present invention is made of aluminum alloy material or titanium alloy material. Considering the cost investment, as a preferred implementation, the metal honeycomb interlayer 13 in the first embodiment is made of aluminum alloy material.

[0063] The filling hole 14 in the present invention is a circular cavity structure or a polygonal cavity structure, and the outer periphery of the damping material filling block 15 is fixed to the inner wall of the filling hole 14 by gluing. Figure 3 and Figure 4 As shown, in order to ensure the adhesion stability between the damping material filling block 15 and the filling hole 14, the filling hole 14 in the first embodiment adopts a polygonal cavity structure, specifically a hexagonal cavity structure.

[0064] like Figure 5 and Figure 6 As shown, the support 2 in this embodiment includes a support body 21 with a cavity therein, a plurality of horizontal vibration-damping grooves 22, and a plurality of vertical vibration-damping grooves 23. The support body 21 is made of carbon fiber composite material. The plurality of horizontal vibration-damping grooves 22 are arranged in the inner cavity of the support body 21 along the horizontal plane. The plurality of vertical vibration-damping grooves 23 are evenly arranged on the outer peripheral surface of the support body 21 along the vertical direction. A damping material insert 24 is installed in the vertical vibration-damping groove 23, and a damping material frame 25 is installed in the horizontal vibration-damping groove 22. The support body 21 can be in a cubic structure, a rectangular parallelepiped structure, or a cylindrical structure. In the first embodiment, the support body 21 is in a cubic structure.

[0065] Specifically, the support body 21 of the support 2 of the first embodiment is made of carbon fiber composite material, and a plurality of horizontal vibration damping grooves 22 and vertical vibration damping grooves 23 are respectively arranged on the inner wall and the outer peripheral surface of the support body 21, and a damping material insert 24 is installed in the vertical vibration damping groove 23, and a damping material frame 25 is installed in the horizontal vibration damping groove 22. On the basis of the damping performance of the support body 21, the damping material insert 24 and the damping material frame 25 are arranged, so that the damping performance of the entire raft frame is greatly improved, that is, compared with the raft frame in the prior art, the damping force of the raft frame of the present invention is significantly increased, and the vibration reduction effect is greatly improved.

[0066] It should be further explained that the support 2 in the first embodiment of the present invention is a carbon fiber composite material damping filling structure. The support body 21 is provided with vertical and horizontal vibration damping grooves on the outside and inside respectively. The damping material is filled in the vibration damping groove by the method of pultrusion and rebound. The horizontal vibration damping groove 22 in the first embodiment of the present invention is rectangular, and the corresponding damping material filled is a damping material frame 25. The vertical vibration damping groove 23 is a vertical strip, and the corresponding damping material filled is a damping material insert 24. It should be understood that the shapes of the horizontal vibration damping groove 22 and the vertical vibration damping groove 23 can also be other shapes, but different shapes can change their vibration damping effects. After a large number of experiments, it is found that the vibration damping effect of the first embodiment of the present invention is the best. During installation, the corresponding damping material is filled in the vertical vibration damping groove 23 and / or the horizontal vibration damping groove 22 by the method of pultrusion and rebound to ensure that the damping material is closely matched with the corresponding vibration damping groove. In this embodiment, vibration-damping grooves are respectively opened on the outside and inside of the support 2, and damping materials are filled in the vibration-damping grooves. During the vibration transmission process, more vibration energy can be dissipated, and the vibration-damping effect is better.

[0067] Embodiment 2

[0068] The difference between the second embodiment and the first embodiment is that the support body 21 of the second embodiment adopts a cylindrical structure, wherein the horizontal vibration damping groove 22 adopts a circular ring structure, the damping material matched with the horizontal vibration damping groove is a circular ring structure, the vertical vibration damping groove 23 is a T-shaped structure, and a plurality of vertical vibration damping grooves 23 are arranged in a circular array on the outside of the support body 21.

[0069] Embodiment 3

[0070] The third embodiment is a method for preparing an integrated carbon fiber composite material damping filled sandwich structure raft based on the first and second embodiments above. Figure 7 As shown, the following steps are included:

[0071] S1. Set the size, shape and thickness of the support plate 1 and the support 2;

[0072] S2. Prepare the support plate 1 according to the size, shape and thickness requirements of the support plate 1 set in step S1;

[0073] S3. Preparation of a carbon fiber composite support 2, that is, a carbon fiber composite material is molded to prepare a support body 21 with a cavity therein, and a plurality of horizontal vibration-damping grooves 22 are provided on the inner wall of the support body 21 and a plurality of vertical vibration-damping grooves 23 are evenly provided on the periphery of the support body 21;

[0074] S4. According to the shape and size of the horizontal vibration damping groove 22 in step S3, a damping material frame 25 matching therewith is prepared, and according to the shape and size of the vertical vibration damping groove 23 in step S3, a damping material insert 24 matching therewith is prepared; the damping material frame 25 is placed in the corresponding horizontal vibration damping groove 22 by means of pultrusion and rebound, and the damping material insert 24 is placed in the corresponding vertical vibration damping groove 23 by means of pultrusion and rebound;

[0075] S5. The two support plates 1 prepared in step S2 and the support 2 prepared in step S4 are subjected to secondary curing to form an initial raft structure;

[0076] S6. Post-process the initial raft structure after secondary curing and forming in step S5 to obtain an integrated raft.

[0077] The raft frame of the first or second embodiment of the present invention can be designed with a size of the raft frame according to a specific usage scenario, and the structural design and layer design of the raft frame can be completed. Different structural designs and layer designs will produce different damping performances, and the design is performed according to the actual application scenario. Specifically, according to the required stiffness and strength requirements, the size, shape and thickness of the support plate 1 are calculated and set, and according to the shock absorption requirements, appropriate metal materials are selected as the material of the metal honeycomb interlayer 13, and the shape and size of the filling holes 14 in the metal honeycomb interlayer 13 are designed. At the same time, according to the stiffness, strength and shock absorption damping force requirements, the height and shape of the support body 21, the shape and position of the horizontal vibration reduction groove 22 and the vertical vibration reduction groove are set. That is, according to the specific application scenario, the size of the raft frame is determined, and the structural design and layer design of the raft frame are completed.

[0078] like Figure 8 As shown, the preparation process of the support plate 1 in step S2 includes the following steps:

[0079] S201. Preparing a carbon fiber composite material prepreg layer and cutting it into a set size;

[0080] S202. According to the setting in step S1, preparing a metal honeycomb interlayer 13;

[0081] S203. Prepare a matching damping material filling block 15 according to the filling hole 14 in the metal honeycomb interlayer 13;

[0082] S204. The outer peripheral surface of the damping material filling block 15 and the inner wall of the filling hole 14 are fixed to the metal honeycomb sandwich 13 by gluing until the damping material filling block 15 completely fills the metal honeycomb sandwich 13;

[0083] S205. Laying the plurality of cut carbon fiber composite material prepreg layers obtained in step S201 layer by layer on the upper and lower surfaces of the metal honeycomb interlayer 13 according to the setting requirements in step S1 to form an upper panel 11 and a lower panel 12;

[0084] S206: The laid support plate 1 is cured and formed once, that is, the support plate 1 is prepared.

[0085] Specifically, the material of the raft frame is selected as a carbon fiber composite material, the reinforcement is carbon fiber, and the matrix is ​​epoxy resin. The carbon fiber and epoxy resin are made into a carbon fiber composite material prepreg in a certain proportion. The damping material can be selected as rubber, polyacrylate, etc. The damping material is prepared according to the polygonal structure cavity of the metal honeycomb interlayer 13, and the damping material filling block 15 is filled into the polygonal structure cavity or the circular structure cavity of the metal honeycomb interlayer 13. The cut carbon fiber composite material prepreg is laid layer by layer on the upper and lower surfaces of the aluminum honeycomb according to the ply design requirements, and then the support plate 1 is cured and formed once. Among them, the one-time curing and forming includes using a curing press to press the laid support plate 1, and the pressed support plate 1 is placed in a curing furnace together with the curing press for heating and curing. The curing temperature is 120℃~150℃, and the curing time is 2.5h~3.5h.

[0086] The support 2 of the first or second embodiment is prepared by compression molding as a whole, and a water-soluble gypsum mold is used in the horizontal vibration-damping groove 22 and the vertical pressure-reducing groove to facilitate demoulding. According to the shape of the horizontal vibration-damping groove 22 and / or the vertical pressure-reducing groove, a matching damping material is prepared, and the shaped damping material is placed in the horizontal vibration-damping groove 22 or the vertical pressure-reducing groove of the support 2 by pultrusion and rebound. The preparation method is simple and reliable, and the support 2 structure in the prior art that adopts a combined type and requires multiple components to be fixed by bolts is abandoned, thereby ensuring the stability of the support 2 during long-term use.

[0087] In step S5, the two support plates 1 prepared in step S2 and the support 2 prepared in step S4 are subjected to secondary curing and molding, which specifically includes: coating adhesive on the contact surfaces of the support 2 and the two support plates 1, and gluing and fixing them accordingly, using a curing fixture to clamp the glued support plate 1 and the support 2, and putting the clamped support plate 1 and the support 2 together with the curing fixture into a curing furnace for heating and curing, wherein the curing temperature is 120°C to 150°C, and the curing time is 2.5h to 3.5h. The post-processing in step S6 is the grinding and trimming of the initial raft structure.

[0088] The preparation process of the raft frame of the present invention is basically carried out in a normal environment, does not require a special preparation environment, and has low cost. The raft frame prepared by the above preparation method is an integrated whole, does not require a bolt fixing structure, and does not occupy space for installing other equipment. At the same time, the integrated structure avoids the loosening of the combined bolt connection structure during long-term operation. The raft frame prepared by the above preparation method has large damping, sufficient rigidity, and light overall weight, and the vibration reduction effect is significantly improved compared with the raft frame prepared by the existing preparation method.

[0089] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. An integrated carbon fiber composite material damping filled sandwich structure raft frame, characterized by: It comprises two support plates (1) and a support (2) arranged between the two support plates (1); The support plate (1) comprises: An upper panel (11) and a lower panel (12); A metal honeycomb interlayer (13) having a plurality of filling holes (14) is arranged between the upper panel (11) and the lower panel (12); A plurality of damping material filling blocks (15) having the same shape as the filling hole (14), wherein the damping material filling blocks (15) are filled in the filling hole (14) of the metal honeycomb sandwich (13); The upper panel (11) and the lower panel (12) are both made of carbon fiber composite material prepreg, which is laid layer by layer and is cured and connected to the upper and lower surfaces of the metal honeycomb sandwich (13).

2. The one-piece carbon fiber composite material damping filled sandwich structure raft according to claim 1, characterized in that: The support (2) comprises: A support body (21) is provided with a cavity therein; the support body (21) is made of carbon fiber composite material; A plurality of horizontal vibration-damping grooves (22) are arranged along a horizontal plane in the inner cavity of the support body (21); A plurality of vertical vibration-damping grooves (23) are evenly arranged on the outer peripheral surface of the support body (21) along the vertical direction; Wherein, a damping material insert strip (24) is installed in the vertical vibration-damping groove (23), and a damping material frame (25) is installed in the horizontal vibration-damping groove (22).

3. The one-piece carbon fiber composite material damping filled sandwich structure raft according to claim 1, characterized in that: The support body (21) is in one of a cubic structure, a rectangular parallelepiped structure and a cylindrical structure.

4. The one-piece carbon fiber composite material damping filled sandwich structure raft according to claim 1, characterized in that: The damping material filling block (15) is made of one or more materials selected from rubber and ethylene-vinyl acetate copolymer.

5. The one-piece carbon fiber composite material damping filled sandwich structure raft according to claim 1, characterized in that: The metal honeycomb interlayer (13) is made of aluminum alloy material or titanium alloy material.

6. The one-piece carbon fiber composite material damping filled sandwich structure raft according to claim 1, characterized in that: The filling hole (14) is in the form of a circular cavity structure or a polygonal cavity structure; the outer periphery of the damping material filling block (15) is fixed to the inner wall of the filling hole (14) by gluing.

7. The method for preparing the integrated carbon fiber composite material damping filled sandwich structure raft according to claim 3, characterized in that: The following steps are involved: S1. Setting the size, shape and thickness of the support plate (1) and the support (2); S2. Prepare the support plate (1) according to the size, shape and thickness requirements of the support plate (1) set in step S1; S3. A support (2) made of a carbon fiber composite material is prepared, that is, a support body (21) having a cavity therein is prepared by compression molding of the carbon fiber composite material, and a plurality of horizontal vibration-damping grooves (22) are provided on the inner wall of the support body (21) and a plurality of vertical vibration-damping grooves (23) are evenly provided on the outer periphery of the support body (21); S4. According to the shape and size of the horizontal vibration damping groove (22) in step S3, a damping material frame (25) matching therewith is prepared, and according to the shape and size of the vertical vibration damping groove (23) in step S3, a damping material insert (24) matching therewith is prepared; the damping material frame (25) is placed in the corresponding horizontal vibration damping groove (22) by means of pultrusion and rebound, and the damping material insert (24) is placed in the corresponding vertical vibration damping groove (23) by means of pultrusion and rebound; S5. The two support plates (1) prepared in step S2 and the support (2) prepared in step S4 are subjected to secondary curing to form an initial raft structure; S6. Post-process the initial raft structure after secondary curing and forming in step S5 to obtain an integrated raft.

8. The method for preparing the integrated carbon fiber composite material damping filled sandwich structure raft according to any one of claim 7, characterized in that: Step S2: The preparation process of the support plate (1) comprises the following steps: S201. Preparing a carbon fiber composite material prepreg layer and cutting it into a set size; S202. According to the setting in step S1, preparing a metal honeycomb sandwich (13); S203. Prepare a matching damping material filling block (15) according to the filling hole (14) in the metal honeycomb interlayer (13); S204. The outer peripheral surface of the damping material filling block (15) and the inner wall of the filling hole (14) are fixed to the metal honeycomb sandwich (13) by gluing until the damping material filling block (15) completely fills the metal honeycomb sandwich (13); S205. Laying the plurality of cut carbon fiber composite material prepreg layers obtained in step S201 layer by layer on the upper and lower surfaces of the metal honeycomb sandwich (13) according to the setting requirements in step S1 to form an upper panel (11) and a lower panel (12); S206. The laid support plate (1) is subjected to a primary curing and forming process, and thus the preparation of the support plate (1) is completed.

9. The method for preparing the integrated carbon fiber composite material damping filled sandwich structure raft according to claim 8, characterized in that: The one-step curing and molding comprises: using a curing press to compact the laid support plate (1); placing the compacted support plate (1) together with the curing press into a curing furnace for heating and curing; The secondary curing molding includes the following contents: Adhesive is applied to the contact surfaces of the support (2) and the two support plates (1), and they are fixed by gluing accordingly; Using a curing fixture to clamp the support plate (1) and the support (2) after being glued and fixed; The clamped support plate (1) and the support base (2) together with the curing fixture are placed in a curing furnace for heating and curing; The curing temperatures of the primary curing molding and the secondary curing molding are both 120° C. to 150° C., and the curing times are both 2.5 h to 3.5 h.

10. The method for preparing the integrated carbon fiber composite material damping filled sandwich structure raft according to any one of claim 7, characterized in that: The post-processing in step S6 includes grinding and trimming the initial raft structure.

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