Marine composite vibration reduction support

Abstract

The utility model relates to the technical field of anti-vibration supports, in particular to a marine composite vibration reduction support which comprises an upper face plate, a web plate, a toggle plate and a bottom plate. The upper panel and the bottom plate are arranged in parallel, and each of the upper panel and the bottom plate adopts a multi-layer plate structure with an acoustic black hole structure; two ends of the web plate are respectively connected with the upper panel and the bottom plate; and three sides of the quadrangular toggle plate are respectively connected with the upper panel, the web plate and the bottom plate. The overall strength and stability of the support are remarkably enhanced, vibration energy is effectively absorbed and dispersed, and the vibration reduction efficiency and durability of the support are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to anti vibration support technical field, concretely is a marine composite damping support. BACKGROUND

[0002] As a highly complex mechanical system, the ship's core mechanical equipment such as power device continuously runs during its navigation operation, which inevitably produces strong vibration and noise. In recent years, with the significant improvement of ship power performance, the vibration and noise problem caused by power machinery is becoming more and more serious. This high-intensity vibration and noise not only poses a serious threat to the working environment and living quality of the crew, leading to decreased work efficiency and impaired physical and mental health, but also may accelerate the fatigue damage of equipment and interfere with the stable operation of precision instruments. What is particularly important is that in the field of military ships, excessive vibration and noise level can significantly weaken its stealth performance, increase the risk of being tracked and detected by the enemy, and thus seriously reduce the battlefield survival ability and combat effectiveness of the ship.

[0003] The main source of ship vibration and noise is the vibration of the main engine. In order to effectively prolong the service life of the equipment and reduce the overall vibration and noise level of the ship, it is particularly important to reasonably apply vibration and noise reduction devices. However, due to the technical limitations of traditional vibration and noise reduction methods, it is often difficult to accurately control the frequency range, and the vibration reduction effect is limited.

[0004] In view of this, the industry has carried out extensive and in-depth research on new ship vibration and noise control devices in recent years, including vibration reduction raft devices, air spring vibration isolation devices, soundproof cover devices, and new devices using advanced materials and technologies. The application of these innovative devices has become a key way to solve the problem of ship vibration and noise. Among them, the vibration and noise reduction device based on the principle of acoustic black hole has attracted widespread attention and discussion in the industry due to its strong pertinence, wide frequency response range, and significant vibration and noise reduction effect.

[0005] Acoustic black hole structure is a free wedge-shaped structure such as plate, beam, etc. with edge thickness gradually decreasing to zero according to power law h(x) = εxm, where h(x) is the thickness of the acoustic black hole region at x, ε is a constant, and m is a positive rational number and m ≥ 2. When the bending wave vertically incident along the direction of gradually decreasing thickness propagates to the edge of the wedge-shaped structure, its cumulative phase tends to infinity near the edge of the structure, resulting in the bending wave unable to continue to propagate to the edge, thereby avoiding the reflection of the wave. This mechanism enables the bending wave energy to be effectively concentrated in the tip edge region of the wedge-shaped structure, forming the so-called "acoustic black hole" effect. Further, rotating this one-dimensional acoustic black hole concept around the edge of the wedge-shaped structure one turn can build a two-dimensional acoustic black hole structure. Such structure can efficiently focus the bending wave energy at the center point, significantly suppress the vibration of other parts of the structure, and show great potential in vibration and noise reduction.

[0006] However, in actual manufacturing process, it is extremely challenging to realize the acoustic black hole structure thickness strictly following the power law variation until the theoretically zero thickness surface. Especially near the tip edge, it is often difficult to avoid the thickness truncation problem. Studies have shown that even a small local truncation will cause the structure reflection coefficient to rise significantly, thereby seriously weakening the expected effect of the acoustic black hole effect.

[0007] To address this challenge, researchers have explored a variety of strategies. Among them, attaching damping material in the acoustic black hole area has been proven to be an effective method to reduce the reflection coefficient. In addition, the use of thinner acoustic black hole uniform area thickness design can not only fully utilize the principle of acoustic black hole, but also to some extent alleviate the manufacturing difficulty, thereby improving the overall performance of the acoustic black hole structure in terms of vibration and noise reduction. These improvements provide a more feasible path for the practical application of acoustic black hole structures. Practical new type content

[0008] The purpose of the present application is to provide a marine composite vibration reduction support to solve at least one of the above technical problems.

[0009] The present application achieves the above-mentioned purposes by the following technical solutions:

[0010] A marine composite vibration reduction support, comprising: an upper panel, a web, an elbow plate, and a bottom plate.

[0011] The upper panel and the bottom plate are arranged in parallel, and both the upper panel and the bottom plate adopt a multilayer panel structure with an acoustic black hole structure.

[0012] The web is connected to the upper panel and the bottom plate at both ends, respectively; and the elbow plate, which is quadrilateral, is connected to the upper panel, the web, and the bottom plate at three sides, respectively.

[0013] Further, the upper panel and the bottom plate are provided with a one-dimensional acoustic black hole array structure, and the acoustic black hole area is filled with damping material.

[0014] And / or,

[0015] The web adopts a rectangular plate provided with a two-dimensional acoustic black hole array structure.

[0016] And / or,

[0017] The elbow plate adopts a rectangular plate provided with a one-dimensional acoustic black hole, and the edge of the one-dimensional acoustic black hole structure on the elbow plate is truncated, and damping material is applied at the edge.

[0018] Further, the array form of the acoustic black holes on the web is a rectangular array.

[0019] Each elbow plate is provided with a plurality of acoustic black holes.

[0020] Further, the upper panel and the bottom plate are a multi-layer structure with the same thickness of each layer, three layers are a group, the first layer is a rubber material layer, and the last two layers are provided with one-dimensional acoustic black holes which are symmetrical to each other at the same position;

[0021] And / or,

[0022] The web plate and the elbow plate are both provided with a multi-layer plate structure with an acoustic black hole structure.

[0023] Further, the thin plates of each layer in the multi-layer plate structure are connected into an integrated body through rivets.

[0024] Further, the acoustic black hole structure in the multi-layer plate structure is processed by 3D printing and is installed in a through hole on the thin plate in a welding manner.

[0025] Further, the web plate and the elbow plate are both provided with a vibration blocking mass.

[0026] Further, the vibration blocking mass is a hollow vibration blocking structure, and the hollow vibration blocking structure is internally filled with metal particle dampings with irregular shapes and different sizes.

[0027] Further, when the length of the hollow vibration blocking structure exceeds a preset length, a partition plate is arranged in the hollow vibration blocking structure.

[0028] Further, the upper panel, the web plate, the elbow plate and the bottom plate are connected through welding.

[0029] The beneficial effects of the utility model lie in:

[0030] The utility model fuses acoustic black hole, local resonance phononic crystal, impedance mismatch and particle damping vibration reduction principles, realizes efficient gathering and absorption of vibration energy. Through designing acoustic black hole structures in the upper panel, the bottom plate, the web plate and the elbow plate, and innovating traditional thick plates into a multi-layer thin plate form, not only the acoustic black hole effect is significantly enhanced, but also more diversified acoustic black hole size and array layout selection are provided, the transmission path of vibration energy is greatly weakened, and the vibration reduction performance is effectively improved.

[0031] The utility model is provided with a vibration blocking mass on the web plate and the elbow plate, and the impedance mismatch principle is utilized to further enhance the vibration isolation effect. Especially, for the case that the length of the hollow vibration blocking structure is relatively long, an optimization scheme of arranging a partition plate in the interior is proposed, so that the vibration blocking mass can maintain its excellent vibration reduction performance in long-term use.

[0032] The utility model discloses under the premise of not influencing structural strength, realize the efficient absorption and dissipation of vibration energy, successfully overcome the problem of poor damping effect of traditional acoustic black hole damping support caused by the plate thickness, provide a kind of brand-new efficient solution for the design of marine composite damping support. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the overall structure schematic of marine composite damping support of one embodiment of the utility model Figure 1 ;

[0034] Figure 2 It is the overall structure schematic of marine composite damping support of one embodiment of the utility model Figure 2 ;

[0035] Figure 3 It is the overall structure schematic of marine composite damping support of one embodiment of the utility model Figure 3 ;

[0036] Figure 4 It is the front view of upper panel of marine composite damping support according to one embodiment of the utility model;

[0037] Figure 5 It is the side view of upper panel according to one embodiment of the utility model;

[0038] Figure 6 It is the local enlarged view of upper panel according to one embodiment of the utility model;

[0039] Figure 7 It is the schematic diagram of web plate of one embodiment of the utility model;

[0040] Figure 8 It is the front view of knee plate according to one embodiment of the utility model;

[0041] Figure 9 It is the embedded schematic diagram of knee plate according to one embodiment of the utility model;

[0042] Figure 10 It is the cross-sectional view of knee plate according to one embodiment of the utility model;

[0043] Figure 11 It is the front view of hollow vibration resistance structure according to one embodiment of the utility model;

[0044] Figure 12 It is the plan view of hollow vibration resistance structure according to one embodiment of the utility model;

[0045] Figure 13 It is the left view of hollow vibration resistance structure according to one embodiment of the utility model.

[0046] Among them, 1. top panel, 2. web, 3. hollow vibration damping structure, 4. elbow plate, and 5. bottom plate. Detailed Implementation

[0047] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the present invention, and are not intended to imply any limitation on the scope of the present invention.

[0048] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0049] Example 1

[0050] Figure 1 This is a schematic diagram of the overall structure of a marine composite vibration damping bracket according to one embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a marine composite vibration damping bracket according to one embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of a marine composite vibration damping bracket according to one embodiment of the present invention. Figure 3 .like Figures 1-3 As shown, according to one embodiment of the present invention, a marine composite vibration damping bracket includes: an upper panel 1, a web plate 2, an elbow plate 4, and a bottom plate 5.

[0051] The upper panel 1 and the bottom plate 5 are arranged in parallel, and both the upper panel 1 and the bottom plate 5 adopt a multi-layer board structure with an acoustic black hole structure.

[0052] The two ends of the web plate 2 are connected to the upper panel 1 and the bottom plate 5 respectively; the three sides of the quadrilateral elbow plate 4 are connected to the upper panel 1, the web plate 2 and the bottom plate 5 respectively.

[0053] Preferably, the upper panel 1, the web 2, the elbow plate 4, and the bottom plate 5 are connected by welding.

[0054] In this embodiment, a composite damping support for ships is proposed, which exhibits significant damping efficiency in terms of structural design and material application, mainly including an upper panel 1, a web plate 2, an elbow plate 4 and a bottom plate 5. In terms of structural layout, the upper panel 1 and the bottom plate 5 are designed in parallel state, which not only serve as the upper and lower support surfaces of the support, but also integrate the multi-layer plate design concept of acoustic black hole structure. This multi-layer plate structure reduces the thickness of the single-layer acoustic black hole thin plate to a certain extent, improves the acoustic black hole effect, and thus significantly improves the damping effect. The web plate 2 serves as a vertical support component connecting the upper panel 1 and the bottom plate 5, and its two ends are firmly welded with the upper panel and the bottom plate respectively, ensuring the vertical stability of the support. The quadrilateral elbow plate 4 has three sides welded with the upper panel 1, the web plate 2 and the bottom plate 5 respectively, forming a stable support structure and further enhancing the overall rigidity and stability of the support.

[0055] The connection mode between the upper panel 1, the web plate 2, the elbow plate 4 and the bottom plate 5 adopts welding technology. Welding not only ensures the close connection between the components, but also greatly improves the overall strength and durability of the support. At the same time, the welding connection can effectively prevent additional stress concentration of vibration at the component connection, thereby further improving the damping performance of the support.

[0056] The utility model significantly enhances the overall strength and stability of the support, effectively absorbs and disperses vibration energy, prevents additional stress concentration of vibration at the component connection, and greatly improves the damping efficiency and durability of the support.

[0057] Figure 4 For the front view of the upper panel according to an embodiment of the utility model, Figure 5 For the side view of the upper panel according to an embodiment of the utility model, Figure 6 For the enlarged view of the upper panel according to an embodiment of the utility model, as Figures 4-6 shown, according to an embodiment of the utility model, the upper panel 1 and the bottom plate 5 are provided with a one-dimensional acoustic black hole array structure, and the acoustic black hole area is filled with damping material;

[0058] and / or,

[0059] Figure 7 For the schematic view of the web plate according to an embodiment of the utility model, as Figure 7 shown, the web plate 2 adopts a rectangular plate provided with a two-dimensional acoustic black hole array structure;

[0060] and / or,

[0061] Figure 8 For the front view of the elbow plate according to an embodiment of the utility model, Figure 9 For the embedded schematic view of the elbow plate according to an embodiment of the utility model, Figure 10As shown in the elbow plate cross section view of one embodiment of the utility model, Figures 8-10 As shown in the elbow plate cross section view of one embodiment of the utility model,

[0062] Preferably, the array of acoustic black holes on the web plate 2 is in the form of a rectangular array.

[0063] Each elbow plate 4 is provided with a plurality of acoustic black holes.

[0064] In this embodiment, the design of the composite vibration reduction support for ships is further optimized, which is embodied in that the upper panel 1 and the bottom plate 5 are provided with a one-dimensional acoustic black hole array structure and filled with damping material to absorb vibration energy; the web plate 2 is designed as a rectangular plate provided with a two-dimensional acoustic black hole array structure, which can more effectively capture and guide the vibration wave into the acoustic black hole area to achieve efficient dissipation of energy; at the same time, the elbow plate 4 is also designed as a rectangular plate provided with a one-dimensional acoustic black hole, and the edge of the acoustic black hole structure is truncated and coated with damping material, which not only ensures the strength of the elbow plate 4, but also further enhances the vibration reduction effect. In particular, the acoustic black holes on the web plate 2 are arranged in the form of a rectangular array, and a plurality of acoustic black holes are ingeniously arranged on each elbow plate 4 to maximize the vibration reduction efficiency. In this embodiment, the web plate 2 is rectangular in shape, and four acoustic black holes are arranged on each elbow plate 4, which not only ensures the structural strength, but also achieves excellent vibration reduction performance.

[0065] The composite vibration reduction support for ships of the utility model improves the vibration reduction efficiency of the support by arranging a one-dimensional acoustic black hole array on the upper panel and the bottom plate and filling damping material, designing the web plate as a rectangular plate provided with a two-dimensional acoustic black hole array, and designing the elbow plate as a rectangular plate provided with a one-dimensional acoustic black hole with truncated edges and coated with damping material, especially the rectangular array and multiple black hole configuration of the acoustic black holes on the web plate and the elbow plate, which not only ensures the structural strength, but also achieves efficient dissipation of vibration energy, thereby significantly enhancing the overall vibration reduction performance.

[0066] According to one embodiment of the utility model, the upper panel 1 and the bottom plate 5 are a multi-layer structure with the same thickness for each layer, three layers form a group, the first layer is a rubber material layer, and the last two layers are provided with a one-dimensional acoustic black hole symmetrically arranged at the same position.

[0067] and / or,

[0068] The web plate 2 and the elbow plate 4 are both provided with a multi-layer plate structure with an acoustic black hole structure.

[0069] Preferably, the thin plates of each layer in the multi-layer plate structure are connected as a whole by rivets.

[0070] Preferably, the acoustic black hole structure in the multi-layered plate structure is 3D printed and installed in the through hole on the thin plate by welding.

[0071] In the embodiment, the upper plate 1 and the bottom plate 5 of the composite damping bracket for ships are in a multi-layered structure, each group containing three layers with the same thickness, wherein the first layer is a rubber material layer for providing basic damping effect; and the last two layers are provided with one-dimensional acoustic black holes symmetric to each other at the same position, which can efficiently capture and guide vibration waves to realize concentrated dissipation of energy. In addition, the web plate 2 and the knee plate 4 also adopt a multi-layered plate structure and are also integrated with acoustic black hole design, further enhancing the overall damping performance. In the multi-layered plate structure, the thin plates are firmly connected into one body by rivets, ensuring the stability and durability of the structure. In particular, the acoustic black hole structure in the embodiment is processed by using advanced 3D printing technology, and then precisely installed in the through hole on the thin plate by welding. This high-precision manufacturing process not only ensures the accurate positioning of the acoustic black hole, but also greatly improves the damping efficiency and structural strength of the bracket.

[0072] The composite damping bracket for ships of the utility model has the advantages that the multi-layered structure design is adopted, the rubber layer and one-dimensional acoustic black holes are integrated in the upper plate and the bottom plate, the web plate and the knee plate adopt a multi-layered plate combined with acoustic black hole design, rivets are used for connection to enhance the structural stability, 3D printing technology is used for accurate manufacturing of the acoustic black holes and welding installation, efficient dissipation of vibration energy and double improvement of structural strength are realized, and the damping performance of the bracket is significantly enhanced.

[0073] Figure 11 Figure 1 is a front view of the hollow vibration blocking structure according to an embodiment of the utility model, Figure 12 Figure 2 is a top view of the hollow vibration blocking structure according to an embodiment of the utility model, Figure 13 Figure 3 is a left view of the hollow vibration blocking structure according to an embodiment of the utility model. As shown in the figure, Figures 11-13 According to an embodiment of the utility model, the web plate 2 and the knee plate 4 are both provided with vibration blocking mass blocks.

[0074] Preferably, the vibration blocking mass block is a hollow vibration blocking structure 3; the hollow vibration blocking structure 3 is filled with metal particle dampers of irregular shapes and different sizes.

[0075] Preferably, when the length of the hollow vibration blocking structure 3 exceeds the preset length, a partition plate is arranged inside the hollow vibration blocking structure 3.

[0076] In this embodiment, the web plate 2 and the knee plate 4 of the marine composite damping support are provided with vibration damping masses to enhance the damping effect of the support. These vibration damping masses adopt the form of hollow vibration damping structures 3 filled with irregularly shaped and various sized metal particle dampers. This design can more effectively absorb and dissipate vibration energy. In particular, when the length of the hollow vibration damping structure 3 exceeds a predetermined value, in order to avoid excessive accumulation and adverse effects of the internal metal particles, a partition is provided inside the hollow vibration damping structure 3 at intervals to separate and support the metal particles, ensuring that they are evenly distributed, thereby further enhancing the vibration damping effect. Through this design, the damping performance of the web plate 2 and the knee plate 4 is significantly enhanced, making an important contribution to the overall performance improvement of the marine composite damping support.

[0077] The marine composite damping support of the utility model improves the damping performance of the support by providing hollow vibration damping structures on the web plate and the knee plate, filling them with irregular metal particle dampers, and adding partitions to optimize particle distribution when the length exceeds a predetermined value, effectively improving the damping performance of the support and significantly enhancing the overall structure's vibration energy absorption and dissipation capacity.

[0078] Example two

[0079] As Figures 1-13 shown, according to an embodiment of the utility model, a marine composite damping support, comprising an upper panel 1, a bottom plate 5, a web plate 2 and a knee plate 4. Among them, the upper panel 1, the bottom plate 5, the web plate 2 and the knee plate 4 are all rectangular and are composed of multiple thin plate structures, each plate is provided with an acoustic black hole structure, and the web plate 2 and the knee plate 4 are further provided with vibration damping masses. The acoustic black hole area is attached with damping material for absorbing vibration energy accumulated by the acoustic black hole effect.

[0080] Preferably, the installation mode between the plates of the support is welding.

[0081] In this embodiment, a marine composite damping support is proposed, which includes an upper panel 1, a bottom plate 5, a web plate 2 and an elbow plate 4, all of which adopt a rectangular shape design. The rectangular shape design not only ensures the overall stability of the support, but also facilitates the installation and adaptation of various ship structures. The components are connected by welding, which strengthens the stability of the overall support. The upper panel 1 and the bottom plate 5 serve as the upper and lower support surfaces of the support, both of which are composed of multiple layers of thin plates. This design not only enhances the strength and rigidity of the panel, but also effectively disperses the vibration energy through the interaction of the multiple layers, reducing vibration transmission. At the same time, both panels are embedded with acoustic black hole structures, which use acoustic black hole effect to guide and concentrate vibration energy, thereby achieving the purpose of vibration and noise reduction. The web plate 2 serves as the vertical support structure of the support, also adopting a multi-layer thin plate structure design. Unlike the upper panel 1 and the bottom plate 5, the web plate 2 is additionally provided with vibration damping masses. These vibration damping masses further enhance the damping performance of the web plate 2 by increasing the local mass. At the same time, the combination of the acoustic black hole structure inside the web plate 2 and the damping material enables the web plate 2 to more effectively absorb and consume vibration energy when subjected to vibration. The elbow plate 4, as a reinforcing structure connecting the web plate 2, the upper panel 1 and the bottom plate 5, also adopts a multi-layer thin plate structure design and is provided with vibration damping masses. The design of the elbow plate 4 not only enhances the overall stability of the support, but also further improves the damping performance of the support through the combined action of the acoustic black hole structure and the damping material. In order to fully absorb the vibration energy concentrated by the acoustic black hole effect, damping materials are specially laid in the acoustic black hole area. These damping materials have excellent vibration absorption performance and can effectively absorb and consume the vibration energy concentrated by the acoustic black hole effect, thereby ensuring that the support as a whole has excellent vibration and noise reduction effect.

[0082] The marine composite damping support proposed by the utility model realizes effective guidance, concentration and absorption of vibration energy through the combined application of the multi-layer thin plate structure, acoustic black hole structure, vibration damping mass and damping material, and provides solid technical support for the stable operation and noise reduction of ships.

[0083] According to an embodiment of the utility model, the upper panel 1, the bottom plate 5, the web plate 2 and the elbow plate 4 are all multi-layer structures, each layer has the same thickness, three layers form a group, the first layer is a rubber material layer, and the last two layers are provided with one-dimensional acoustic black holes that are symmetrical to each other at the same position.

[0084] Preferably, the upper panel 1, the bottom plate 5, the web plate 2 and the elbow plate 4 are composite structures composed of multiple thin plates, and the thin plates are connected into one body by rivets.

[0085] In the embodiment, the upper plate 1, the bottom plate 5, the web plate 2 and the elbow plate 4 all adopt a multi-layer structure design, each layer has the same thickness, three layers form a group, the first layer of the structural unit of one group adopts a rubber material layer, the layer of material has good elasticity and vibration absorption performance, and can effectively absorb and disperse vibration energy.

[0086] The combination of the above multi-layer structure and the acoustic black hole structure exhibits excellent vibration reduction and noise reduction performance.

[0087] According to one embodiment of the utility model, each rectangular elbow plate 4 is provided with a group of four one-dimensional acoustic black holes.

[0088] Preferably, the edges of the one-dimensional acoustic black hole structure on the elbow plate 4 are truncated, and damping material is applied at the edges.

[0089] In the embodiment, a plurality of elbow plates 4 are connected between the upper plate 1 and the bottom plate 5, and the elbow plates 4 are connected perpendicularly to the upper plate 1 and the bottom plate 5; on each rectangular elbow plate 4, a group of four one-dimensional acoustic black holes are arranged.

[0090] The rectangular elbow plates 4 are arranged between the upper plate 1 and the bottom plate 5 to form a stable connection. These elbow plates 4 not only serve as structural supports, but also incorporate advanced acoustic design concepts. Specifically, each rectangular elbow plate 4 is carefully designed with a group of four one-dimensional acoustic black holes, which are evenly distributed along a certain dimension of the elbow plate 4, aiming to absorb and dissipate vibration energy, thereby significantly improving the overall vibration reduction effect. In order to further optimize the acoustic performance, the edges of the acoustic black hole structure on the elbow plate 4 are truncated, and damping material is applied at the edges, which further enhances the absorption of vibration energy and reduces the reflection and transmission of energy, thereby significantly improving the overall vibration reduction effect.

[0091] The elbow plate of the utility model not only enhances the stability of the structure, but also achieves excellent acoustic performance, greatly enhances the absorption and dissipation of vibration energy, thereby significantly reducing vibration transmission and noise pollution.

[0092] According to one embodiment of the utility model, the array form of the acoustic black holes on the web plate 2 is a rectangular array.

[0093] In this embodiment, the acoustic black holes on the web plate 2 adopt a rectangular array arrangement. This design makes the acoustic black holes evenly distributed on the web plate 2, and each acoustic black hole can effectively guide and absorb vibration energy, thereby further enhancing the overall vibration absorption and noise reduction performance of the web plate 2. The arrangement of the rectangular array not only ensures the efficiency of energy absorption, but also optimizes the stability and reliability of the structure.

[0094] The web plate of the utility model adopts the design of acoustic black holes in a rectangular array, and the vibration control and noise suppression capability is significantly improved.

[0095] According to one embodiment of the utility model, the vibration blocking mass is a hollow vibration blocking structure 3, and the inside is filled with irregular-shaped metal particle dampers of different sizes.

[0096] Preferably, the filling amount of the hollow vibration blocking structure 3 is 2 / 3 to 3 / 4 of the volume.

[0097] In this embodiment, the vibration blocking mass adopts a hollow vibration blocking structure 3, and the inside of the hollow vibration blocking structure 3 is filled with irregular-shaped metal particles of different sizes as a damping material. This design not only takes full advantage of the lightweight and high-strength characteristics of the hollow shell structure, but also effectively increases the damping performance of the vibration blocking mass by filling the inside with metal particles. Preferably, the filling amount of the metal particles is controlled to be between 2 / 3 and 3 / 4 of the volume of the hollow shell structure, which not only ensures sufficient damping effect, but also avoids the problem of excessive filling that may cause excessive structural stiffness and reduced vibration transmission efficiency. The vibration blocking mass can effectively absorb and dissipate energy on the vibration transmission path, thereby significantly improving the vibration isolation and noise control performance of the overall structure.

[0098] The vibration blocking mass of the utility model adopts the combination of a hollow vibration blocking structure and irregular-shaped metal particle dampers, and by optimizing the filling ratio, the vibration suppression and noise control capability of the vibration blocking mass is significantly improved.

[0099] According to one embodiment of the utility model, the processing mode of the acoustic black hole structure is 3D printing, and the acoustic black hole structure is installed in the through hole on the sheet in a welding manner.

[0100] In this embodiment, the acoustic black hole structure is processed by using advanced 3D printing technology, and this processing mode can accurately manufacture acoustic black holes with complex geometric shapes and fine structures. Then, the accurately manufactured acoustic black hole structure is firmly installed in the predetermined through hole on the sheet by welding, thereby ensuring the stability and reliability of the structure.

[0101] The utility model utilizes 3D printing and welding technology to realize high-precision and high-stability installation of the acoustic black hole structure on the sheet, thereby providing strong support for the optimization of acoustic performance.

[0102] Embodiment three

[0103] According to an embodiment of the utility model, a design method of a marine composite damping support is used for manufacturing any marine composite damping support of the utility model, and the method comprises the following steps:

[0104] Step S102, basic structure design: according to the mounting requirements of the support, the parameters of the general support structure are preliminarily designed to ensure that the support can meet the basic strength requirement in the working state;

[0105] The mounting requirements include mounting position, working environment and bearing requirement;

[0106] Step S104, acoustic black hole design of the upper panel 1 and the bottom plate 5: the thickness of the upper panel 1 and the bottom plate 5 is divided, and the acoustic black hole structure is designed according to the thickness, size and selected material of the sheet;

[0107] The thickness division of the upper panel 1 and the bottom plate 5 can be equal division or unequal division;

[0108] Step S106, acoustic black hole design of the web plate 2 and the knee plate 4: the thickness of the web plate 2 and the knee plate 4 is divided, and the acoustic black hole structure is designed according to the thickness, size and selected material of the sheet;

[0109] The thickness division of the web plate 2 and the knee plate 4 can be equal division or unequal division;

[0110] The web plate 2 can be designed as a rectangular plate with a two-dimensional acoustic black hole array structure, and the knee plate 4 can adopt a one-dimensional acoustic black hole structure. Similarly, the parameters of these structures need to be customized according to the physical characteristics and expected performance of the sheet.

[0111] Step S108, vibration damping mass position planning: the mounting position of the hollow vibration damping mass is planned at a proper position of the support structure; wherein the web plate 2 and the knee plate 4 are provided with vibration damping masses;

[0112] These vibration damping masses adopt a hollow vibration damping structure 3, which aims to further enhance the damping effect of the support through irregular and different-sized metal particle dampers filled in the hollow vibration damping structure 3;

[0113] Step S110, when the length of the hollow vibration damping structure 3 constituting the vibration damping mass exceeds the preset length, a partition is arranged in the hollow vibration damping structure 3 at every certain distance.

[0114] When the length of the vibration blocking mass is long, in order to prevent the accumulation of internal metal particles, a partition is arranged inside the hollow vibration blocking structure 3 at every certain distance. This step ensures that the vibration blocking mass can maintain the stability and effectiveness of its vibration reduction performance during long-term use.

[0115] The design method of the marine composite vibration reduction support of the utility model, through the accurate basic structure design, the innovative acoustic black hole design and the reasonable vibration blocking mass position planning and internal structure optimization, ensures that the support meets the basic strength requirement at the same time, significantly improves its vibration reduction and noise reduction performance, and is especially suitable for complex and changeable ship working environment.

[0116] Example four

[0117] According to one embodiment of the utility model, a design method of a marine composite vibration reduction support is used for manufacturing any marine composite vibration reduction support of the utility model, and the method comprises the following steps:

[0118] Step S1: design the parameters of the ordinary support structure (the acoustic black hole position is provided with a through hole, and a contrast drawing is drawn) according to the installation requirements of the support, so that the strength requirement in work is met.

[0119] In the process of designing the support parameters, in addition to considering the strength requirement of the support, the vibration transmission characteristic analysis should also be referred to, so that the support structure can effectively reduce the transmission of vibration energy on the basis of meeting the strength. When designing the ordinary support structure, the position and shape of the acoustic black hole are preliminarily planned, so that the through hole design not only meets the demand of the acoustic black hole effect, but also avoids the adverse effect on the structural strength.

[0120] Step S2: divide or not divide the thickness of the upper plate 1 and the bottom plate 5, and design the acoustic black hole according to the thickness, size and material parameters of the thin plate.

[0121] When selecting the materials of the upper plate 1 and the bottom plate 5, the damping characteristics and the lightweight high-strength characteristics of the materials are considered, so as to further improve the vibration reduction performance and reduce the weight. By using finite element analysis (FEA) and other tools, the acoustic black hole of the upper plate and the bottom plate with different thicknesses is accurately designed, so as to effectively absorb vibration energy at the preset frequency.

[0122] Step S3: divide or not divide the thickness of the web plate 2, and design the acoustic black hole according to the thickness, size and material parameters of the divided thin plate.

[0123] For the web plate 2, a multi-layer structure can be considered, each layer adopts different thickness and material to form a gradient change acoustic black hole effect, so as to further improve the vibration reduction efficiency. In the design of the acoustic black hole of the web plate 2, dynamic response analysis is added to ensure the stability and effectiveness of the design under different working conditions.

[0124] Step S4: Determine the mounting position of the vibration damping mass on the web plate 2 and the elbow plate 4 according to the acoustic black hole position. In principle, to reduce the mass of the support, the acoustic black hole area is not installed with a vibration damping mass.

[0125] In determining the mounting position of the vibration damping mass, in addition to avoiding the acoustic black hole area, the optimal vibration damping mass distribution should be found by using topological optimization and other methods to maximize the vibration reduction effect. Consider using lightweight high-strength materials or hollow structure design for the vibration damping mass to further reduce the overall mass of the support.

[0126] Step S5: When the length of the vibration damping mass is relatively long, a partition is provided inside the shell every certain distance to prevent internal particle accumulation.

[0127] The design of the partition should consider its stiffness and damping characteristics to ensure that it can effectively prevent internal particle accumulation while not affecting the vibration reduction effect of the acoustic black hole. Consider using materials with sound absorption or damping properties to make the partition. For long vibration damping masses, in addition to setting partitions, the internal flow channel design can be optimized to ensure smooth airflow or liquid flow, avoiding the generation of additional vibration sources.

[0128] In this embodiment, the designed marine composite vibration reduction support includes: a one-dimensional acoustic black hole upper panel 1, a two-dimensional acoustic black hole web plate 2, a hollow vibration damping structure 3, a one-dimensional acoustic black hole elbow plate 4, and a one-dimensional acoustic black hole bottom plate 5. The one-dimensional acoustic black hole upper panel 1 and the bottom plate 5 are designed as rectangular plate structures, and the upper panel 1 and the bottom plate 5 are respectively composed of multiple layers of equal thickness plates. The three layers of the plate are a group, the first layer is a rubber damping layer, the second and third layers are symmetric one-dimensional slot type acoustic black hole plate structures, and the acoustic black hole area is filled with damping material. The two-dimensional acoustic black hole web plate 2 is a rectangular multi-layer plate structure, and there are two rows of two-dimensional circular acoustic black holes in a rectangular array on the plate, and the acoustic black hole area is filled with damping material. The one-dimensional acoustic black hole elbow plate 4 is a rectangular multi-layer plate structure, and there are two rows of one-dimensional wedge-shaped acoustic black holes in an array on the plate, the acoustic black hole edge is truncated, the truncated end is free, and the truncated part is pasted with damping material. The hollow vibration damping structure 3 is welded to the lower surface of the upper panel 1 and the side surfaces of the web plate 2 and the elbow plate 4, and is a multi-segment hollow structure filled with high-density particles of different sizes and irregular shapes.

[0129] The design method of the marine composite vibration reduction support of the utility model, by combining one-dimensional and two-dimensional acoustic black hole structure, lightweight high-strength material and hollow vibration damping structure design, and optimizing the vibration damping mass distribution and internal flow channel, effectively improves the vibration reduction performance and structural efficiency of the support, reduces the overall mass, avoids the problem of internal particle accumulation, and realizes efficient and lightweight vibration control.

[0130] The utility model discloses utilize acoustic black hole, local resonance phononic crystal, impedance mismatch, particle damping vibration reduction etc. Principle will gather energy in acoustic black hole structure center position, and by damping material will vibration energy absorption and dissipate, through damping mass utilize impedance mismatch principle and carry out vibration isolation.

[0131] The utility model discloses a thick plate of traditional damping support is designed as the form of several layers of thin plate, makes acoustic black hole effect more obvious, efficient in support structure, and can make acoustic black hole structure's size and array form have more choice, greatly reduce the transmission of vibration energy. The utility model discloses can overcome the problem of poor damping effect in traditional acoustic black hole damping support because of thick plate thickness, and reach the effect of efficient damping under the condition of not influencing structural strength.

[0132] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the utility model range involved in the application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by the combination of the above technical features or their equivalent features without departing from the utility model concept. For example, the technical solution formed by the mutual replacement of the above features and the technical features disclosed in the application (but not limited to) having similar functions.

[0133] It should be understood that the sequence of the utility model content and the steps in the embodiments of the utility model does not absolutely mean the execution order, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the utility model.

Claims

1. A composite vibration damping support for a ship, characterized by The utility model relates to a sound absorption panel, including: The upper panel (1), the web (2), the elbow board (4), the bottom plate (5); The upper panel (1) is parallel with the bottom plate (5), and the upper panel (1) and the bottom plate (5) adopt multilayer board structure with acoustic black hole structure; The web (2) is connected with the upper panel (1) and the bottom plate (5) respectively at both ends, and the elbow board (4) is connected with the upper panel (1), the web (2) and the bottom plate (5) respectively at three edges.

2. Marine composite vibration damping support according to claim 1, characterized in that: The upper panel (1) and the bottom plate (5) are provided with one-dimensional acoustic black hole array structure, and the acoustic black hole area is filled with damping material; And / or, The web (2) adopts rectangular plate provided with two-dimensional acoustic black hole array structure; And / or, The elbow board (4) adopts rectangular plate provided with one-dimensional acoustic black hole, and the edge of one-dimensional acoustic black hole structure on the elbow board (4) is truncated, and damping material is applied at the edge.

3. Marine composite vibration damping support according to claim 2, characterized in that: The array form of acoustic black hole on the web (2) is rectangular array; Each elbow board (4) is provided with a plurality of acoustic black holes.

4. Marine composite vibration damping support according to claim 1, characterized in that: The upper panel (1) and the bottom plate (5) are multilayer structure with same thickness of each layer, three layers are a group, the first layer is rubber material layer, and the last two layers are provided with one-dimensional acoustic black hole symmetric with each other at the same position; And / or, The web (2) and the elbow board (4) adopt multilayer board structure with acoustic black hole structure.

5. Marine composite vibration mount according to claim 4, characterized in that: The thin plates of each layer in the multilayer board structure are connected into an integral whole through rivets.

6. Marine composite vibration damping support according to claim 4, characterized in that: The processing mode of acoustic black hole structure in the multilayer board structure is 3D printing, and the acoustic black hole structure is installed in the through hole on the thin plate in a welded manner.

7. Marine composite vibration mount according to claim 1, characterized in that: The web (2) and the elbow board (4) are provided with damping mass.

8. Marine composite vibration damping support according to claim 7, characterized in that: The damping mass is a hollow damping structure (3), and the hollow damping structure (3) is filled with irregular-shaped metal particle damping with different sizes.

9. Marine composite vibration damping support according to claim 8, characterized in that: When the length of the hollow damping structure (3) exceeds the preset length, a partition plate is arranged in the hollow damping structure (3).

10. Marine composite vibration damping support according to claim 1, characterized in that: The upper panel (1), the web (2), the elbow board (4) and the bottom plate (5) are connected through welding.

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