Low-noise composite structure based on metal profile

Abstract

The utility model belongs to the field of building materials, and relates to a building beam column made of metal profiles, in particular to a low-noise composite structure based on the metal profiles. The tuned mass vibration absorber comprises a beam column made of a metal profile and further comprises the tuned mass vibration absorber, and in the cross section direction of the metal profile, for an open type H-shaped profile, an I-shaped profile, a groove-shaped profile, a T-shaped profile or an angle-shaped profile, the tuned mass vibration absorber is fixedly arranged at the end of an outer suspension section of the metal profile, and the tuned mass vibration absorber is fixedly connected with the beam column. Or / and the tuned mass vibration absorber is fixedly arranged in the middle of a connecting web of the H-shaped profile, the I-shaped profile and the groove-shaped profile; for a closed polygonal tubular profile, the tuned mass vibration absorber is fixedly arranged in the middle of at least one side edge of the tubular profile; for a circular tube-shaped section bar or an elliptical tube-shaped section bar, the tuned mass vibration absorber is fixedly arranged on the outer surface of the tube wall. According to the utility model, forced vibration of the metal structure can be effectively inhibited, and radiation noise of the metal structure is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of building materials, and relates to a building beam-column composed of metal profiles, in particular to a low-noise composite structure based on metal profiles. Background Art

[0002] In the construction field, compared with concrete structures, metal profiles have good bending resistance and load-bearing capacity, but are lighter in weight, occupy less space, and are more convenient to connect with surrounding structures. Therefore, they are widely used in various framed buildings, especially in some beam-column structures with relatively high height or large span in the fields of petrochemical industry, electric power, etc. Among them, the most widely used and typical one is the steel structure building. In steel structure building projects, metal profiles are widely used to construct beams or columns, referred to as beam-columns for short. It is found in practice that due to the large stiffness and small system damping of the metal profile beam-column structure in such steel structure buildings, it is easily affected by the vibration of connected power equipment, pipelines and other facilities, inducing resonance and structural noise, which will have an adverse impact on the surrounding environment. Seriously, it may even cause environmental protection complaints from surrounding residents, affecting the construction of a harmonious society.

[0003] In summary, the market urgently needs a metal profile beam-column with less sound emission and better environmental protection performance to meet the needs of the sustainable development of green buildings. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above defects and provide a low-noise composite structure based on metal profiles that can effectively suppress the forced vibration of metal structures and reduce the radiated noise of metal structures.

[0005] The low-noise composite structure based on metal profiles of the utility model is realized as follows: it includes beam-columns made of metal profiles. In addition, it also includes a tuned mass damper. In the cross-sectional direction of the metal profile, for open H-shaped profiles, I-shaped profiles, channel profiles, T-shaped profiles or angle profiles, the tuned mass damper is fixedly arranged at the end of the overhanging section of the metal profile, and / or the tuned mass damper is fixedly arranged in the middle of the connecting web of the H-shaped profile, I-shaped profile or channel profile; for closed polygonal tubular profiles, the tuned mass damper is fixedly arranged in the middle of at least one side of the tubular profile; for circular tubular profiles or elliptical tubular profiles, the tuned mass damper is fixedly arranged on the outer surface of the pipe wall.

[0006] The low-noise composite structure based on metal profiles of the utility model may also include a sound insulation cover, which covers the outside of the metal profile and the tuned mass damper, and sound absorption materials are arranged in the cavity between the sound insulation cover and the metal profile.

[0007] In the present utility model, the metal profiles are of various types. Typically, there are H-shaped profiles (i.e., H-beams), channel-shaped profiles (i.e., channel steels), I-shaped profiles (i.e., I-beams), T-shaped profiles (i.e., T-beams), multi-sided tubular profiles (such as triangular steel pipes, square steel pipes, or rectangular steel pipes, etc.), circular tubular profiles (i.e., circular steel pipes), elliptical tubular profiles (i.e., elliptical steel pipes), or angle-shaped profiles (i.e., angle steels) made of steel materials commonly used in engineering. Of course, they can also be profiles of the above types made of aluminum alloy or other high-strength metal materials. Among them, for profiles such as H-shaped profiles (i.e., H-beams), channel-shaped profiles (i.e., channel steels), and I-shaped profiles (i.e., I-beams), when viewed from the cross-section, they have both cantilever segments and connecting webs; while profiles such as T-shaped profiles (i.e., T-beams) and angle-shaped profiles (i.e., angle steels) only have cantilever segments.

[0008] To achieve good vibration control effects, preferably, in the length direction of the metal profile, the tuned mass damper is arranged at the position with the maximum amplitude of the main vibration mode that contributes greatly to noise, and the working frequencies of the tuned mass damper respectively correspond to the frequencies of the main vibration modes at the installation positions.

[0009] The fixed connection methods between the tuned mass damper and the metal profile can be various. For example, the tuned mass damper can be fixedly attached or magnetically attracted and fixed on the surface of the metal profile; or, the tuned mass damper can be fixed on the metal profile using fasteners; in addition, the low-noise composite structure based on the metal profile of the present utility model can also include spring clamps, and the tuned mass damper is clamped and fixed on the surface of the metal profile by using the spring clamps. The tuned mass dampers (also known as tuned mass vibration dampers or tuned mass dampers) that can be adopted in the present utility model are of various types. Preferably, the tuned mass damper includes an outer frame, an elastic element, and at least one mass block. The mass block is at least partially arranged in the chamber of the outer frame, and the elastic element is arranged between the mass block and the outer frame. Typically, it is the tuned mass vibration damper with a frame disclosed in the Chinese invention patent with the patent authorization number ZL201310287705.1.

[0010] For the technical solution with a sound insulation cover, in order to prevent contact between the metal profile and the sound insulation cover from causing vibration short-circuit, the low-noise composite structure based on the metal profile of the present utility model can also include an elastic vibration isolator, and the elastic vibration isolator is arranged between the sound insulation cover and the metal profile. The elastic vibration isolator is an elastic strip, an elastic cushion plate, or an elastic cushion block made of an elastic material. The elastic vibration isolator is an elastic strip, an elastic cushion plate, or an elastic cushion block made of an elastic material. Among them, the elastic materials that can be selected can also be various. For example, elastic rubber materials, elastic polyurethane materials, etc. can all be applicable to the present utility model.

[0011] In addition, considering the cost performance, preferably, the sound insulation cover is made of thin steel plate. The sound insulation cover is made of thin steel plate, and a vibration suppression functional layer formed by pasting, vulcanizing or coating a damping material is provided on at least one surface of the thin steel plate. On this basis, one side of the vibration suppression functional layer is connected to the thin steel plate, and a vibration suppression restraint plate can also be provided on the other side. The vibration suppression functional layer and the vibration suppression restraint plate together form a constrained damping structure on the surface of the thin steel plate. In addition, for the convenience of assembly production and later maintenance, the sound insulation cover can also be formed by splicing an upper sound insulation cover body and a lower sound insulation cover body, and the upper sound insulation cover body and the lower sound insulation cover body are fixedly connected together by fasteners.

[0012] Furthermore, in order to achieve a better vibration and noise reduction effect, a constrained damping structure can also be fixedly provided on the local surface of the metal profile, and the constrained damping structure is arranged to avoid the tuned mass damper. The constrained damping structure at least includes a damping layer and a restraint plate. The constrained damping structure can also include a connecting plate, the connecting plate is connected to the metal profile, and the damping layer is arranged between the connecting plate and the restraint plate. Typically, the constrained damping structure can be a labyrinth-type constrained damping structure, and corresponding convex and concave structures are provided on the connecting plate and the restraint plate, and the damping layer is arranged between the connecting plate and the restraint plate. It should be noted that the restraint plate described in the present invention can be a metal plate, a plastic plate, a composite material plate, or a constrained covering layer formed by spraying and curing, and its elastic modulus is more than 5 times that of the damping layer.

[0013] In order to improve the reliability of the limit connection and prevent the tuned mass damper from accidentally falling off during use, the low-noise composite structure based on the metal profile of the present invention can also include a limit clamp. The limit clamp is fixedly connected to the metal profile and locks the relative spatial position between the tuned mass damper and the metal profile. The limit clamp forms a non-contact limit or a contact limit through an elastic layer on the tuned mass damper. As a typical structure of a limit clamp, the limit clamp includes a U-shaped positioning clamp and a positioning locking screw fixedly connected to the metal profile, and a limit retaining ring integrally provided with the U-shaped positioning clamp. The limit retaining ring surrounds the end of the tuned mass damper. After applying the limit clamp, it can effectively prevent the tuned mass damper from accidentally falling off and causing losses to personnel or property after the fixing of the adhesive or fastener fails. Of course, the limit clamp can also serve as a basic component for fixing the tuned mass damper, that is, using the limit clamp to replace the adhesive or fastener to fix the tuned mass damper on the surface of the metal profile.

[0014] In order to reduce weight and improve the noise reduction effect, a local closed cavity can also be provided between the surface of the metal profile and the sound-absorbing material, or a local closed cavity can be provided between the surface of the metal profile, the surface of the tuned mass damper and the sound-absorbing material.

[0015] The utility model is based on a low-noise composite structure of metal profiles. On the one hand, by adding a tuned mass damper to the metal profiles that make up the beams and columns, the vibration energy transmitted from external structural facilities to the metal profiles can be effectively absorbed and consumed, the forced vibration and sound generation of the metal profiles can be suppressed, and the occurrence of resonance can be avoided. In particular, according to the engineering needs, the same type of tuned mass damper can be fixedly arranged on the surface of the metal profiles to control the vibration of a specific frequency, or tuned mass dampers for controlling the vibration of different frequencies can be arranged at different positions of the metal profiles. If an integrated tuned mass damper that can control multiple vibration frequencies simultaneously is adopted, it is possible to use the same type of tuned mass damper product to control the vibrations of multiple frequencies that contribute more to the vibration energy of the metal profiles, thereby effectively improving the vibration reduction effect and space utilization rate. Controlling the vibration of the metal profiles controls the structural noise radiation intensity generated by the metal profiles due to vibration at the source. When arranging, the tuned mass damper is not only arranged at the maximum amplitude of the metal profiles, but also specifically arranged at the outer suspended section near the end of the cross-section. In this way, with the same total weight of the tuned mass damper, it can play several times the vibration reduction effect compared with the ordinary arrangement or random arrangement, achieving a vibration reduction effect of one against three or even one against ten, and can also effectively reduce the additional load of the beam-column structure. On the other hand, the sound absorption material is used to effectively absorb the structural radiation noise generated by the vibration of the metal profiles, and at the same time, the sound insulation cover is used to effectively shield the structural radiation noise, greatly reducing the impact of the radiation noise of the metal profiles on the surrounding environment. In particular, after adding a constrained damping structure to the surface of the metal profiles, through the vibration reduction and noise reduction effect of the constrained damping structure, the vibration of the metal profiles and the noise radiated from the surface of the metal profiles can be further attenuated, thereby achieving a better sound insulation effect.

[0016] In summary, the utility model is based on a low-noise composite structure of metal profiles. By setting measures such as tuned mass dampers and constrained damping structures, the vibration of the metal profiles themselves is greatly reduced, and the noise radiation intensity of the metal profiles to the outside is reduced from the source. ， Then, measures such as sound absorption materials and sound insulation covers are used to effectively absorb and block the structural noise generated by the metal profiles, further reducing the noise radiation intensity of the metal profiles to the external environment, thereby achieving a good noise reduction effect. On the other hand, through the effective suppression of vibration, the fatigue damage of the metal profile beams and columns can be prevented, which is beneficial to extending the service life of the metal profile beams and columns, and can be widely applied to metal frame structure buildings in fields such as petrochemical and electric power. Brief Description of the Drawings

[0017] Figure 1 It is one of the structural schematic diagrams of the low-noise composite structure of the utility model based on metal profiles.

[0018] Figure 2 It is the second structural schematic diagram of the low-noise composite structure of the utility model based on metal profiles.

[0019] Figure 3 This is the third schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0020] Figure 4 This is the fourth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0021] Figure 5 This is the fifth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0022] Figure 6 This is the sixth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0023] Figure 7 This is the seventh schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0024] Figure 8 This is the eighth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0025] Figure 9 This is the ninth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0026] Figure 10 This is the tenth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0027] Figure 11 This is the eleventh schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0028] Figure 12 It is Figure 11 the partial enlarged view of A in

[0029] Figure 13 This is the twelfth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0030] Figure 14 This is the thirteenth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0031] Figure 15 This is the fourteenth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0032] Figure 16 This is the fifteenth schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0033] Figure 17Figure 16 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0034] Figure 18 Figure 17 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0035] Figure 19 Figure 18 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0036] Figure 20 Figure 19 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0037] Figure 21 Figure 20 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0038] Figure 22 Figure 21 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0039] Figure 23 Figure 22 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0040] Figure 24 Figure 23 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0041] Figure 25 Figure 24 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0042] Figure 26 Figure 25 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0043] Figure 27 Figure 26 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0044] Figure 28 For Figure 27 Schematic diagram of the layout of the tuned mass damper.

[0045] Figure 29 Figure 27 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0046] Figure 30 Figure 28 of the structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0047] Figure 31This is the twenty-ninth structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0048] Figure 32 This is the thirtieth structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model.

[0049] Figure 33 This is the thirty-first structural schematic diagram of the low-noise composite structure based on metal profiles of the present utility model. Detailed implementation manners

[0050] Embodiment 1

[0051] As Figure 1 shown, the low-noise composite structure based on metal profiles of the present utility model includes beam-columns made of metal profile 1, and the metal profile 1 is specifically an H-shaped steel. In addition, it further includes a tuned mass damper 2, and the tuned mass damper 2 is adhesively fixed at the end of the outer cantilever section on one side of the metal profile 1 forming the beam-column, that is, at the end of one side wing plate; the tuned mass dampers 2 are adhesively installed and arranged at intervals in the length direction of the metal profile 1 according to the position with the largest amplitude of the main vibration mode with large noise contribution, and the working frequencies of the tuned mass dampers respectively correspond to the main vibration mode frequencies at the installation positions.

[0052] For the low-noise composite structure based on metal profiles of the present utility model, by adding tuned mass dampers on the metal profiles forming the beam-columns, the vibration energy transmitted from external structural facilities to the metal profiles can be effectively absorbed and consumed, the forced vibration and sound generation of the metal profiles can be suppressed, and the occurrence of resonance can be avoided. It should be particularly pointed out that according to engineering needs, the same type of tuned mass damper can be fixedly arranged on the metal profile surface to control the vibration of a certain specific frequency, or tuned mass dampers for controlling the vibration of different frequencies can be arranged at different positions of the metal profile. If an integrated tuned mass damper that can control multiple vibration frequencies simultaneously is adopted, it can be realized to control the vibration of multiple frequencies that contribute more to the vibration energy of the metal profile by using the same type of tuned mass damper product, thereby effectively improving the vibration reduction effect and space utilization rate. Controlling the vibration of the metal profile controls the structural noise radiation intensity generated by the vibration of the metal profile from the source. When arranging, the tuned mass dampers are not only arranged at the maximum amplitude of the metal profile, but also specifically arranged at the position near the end of the outer cantilever section of the cross-section. In this way, with the same total weight of the tuned mass dampers, the vibration reduction effect several times that of the ordinary arrangement or random arrangement can be achieved, realizing a vibration reduction effect of one against three or even one against ten, and the additional load of the beam-column structure can also be effectively reduced.

[0053] In summary, the low-noise composite structure of the present utility model based on metal profiles significantly reduces the vibration of the metal profiles themselves by setting tuned mass dampers, thereby reducing the noise intensity radiated by the metal profiles from the source. On the other hand, by effectively suppressing the vibration, it is possible to prevent fatigue damage to the metal profile beams and columns, which is beneficial to extending the service life of the metal profile beams and columns, and can be widely applied to metal frame structure buildings in fields such as petrochemical and electric power.

[0054] Embodiment 2

[0055] As Figure 2 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Embodiment 1 in that it further includes a sound insulation cover 3. The sound insulation cover 3 is wrapped around the outside of the metal profile 1. The sound insulation cover 3 is made of a metal sound-absorbing thin plate. An absorbent material 5 is provided in the chamber between the sound insulation cover 3 and the metal profile 1. Specifically, the absorbent material 5 is rock wool.

[0056] Compared with Embodiment 1, in the technical solution described in this example, due to the addition of the sound insulation cover and the absorbent material, the absorbent material effectively absorbs the structure-borne noise generated by the vibration of the metal profile, and at the same time, the sound insulation cover effectively shields the structure-borne noise, greatly reducing the impact of the noise radiated by the metal profile on the surrounding environment. In particular, when a constrained damping structure is added to the surface of the metal profile, through the vibration reduction and noise reduction effect of the constrained damping structure, the vibration of the metal profile and the noise radiated from the surface of the metal profile can be further attenuated, thereby achieving a better sound insulation effect.

[0057] In summary, the low-noise composite structure of the present utility model based on metal profiles significantly reduces the vibration of the metal profiles themselves by setting tuned mass dampers, thereby reducing the noise intensity radiated by the metal profiles from the source ， Then, by using measures such as absorbent materials and sound insulation covers to effectively absorb and block the structure-borne noise generated by the metal profile, the noise intensity radiated by the metal profile to the external environment is further reduced, thereby achieving a good noise reduction effect. On the other hand, by effectively suppressing the vibration, it is possible to prevent fatigue damage to the metal profile beams and columns, which is beneficial to extending the service life of the metal profile beams and columns, and can be widely applied to metal frame structure buildings in fields such as petrochemical and electric power.

[0058] It should be noted that the absorbent materials applicable to the present utility model can also be various. For example, rock wool, mineral wool, melamine cotton or foaming materials can be used, all of which can achieve good sound absorption and noise reduction effects. In addition, in this example, the tuned mass damper is taken as an example of being fixedly attached to the connection web surface of the metal profile constituting the beam and column. In actual applications, the tuned mass damper can also be fixedly arranged at the end of the overhanging section of the metal profile and the connection web surface at the same time. In addition, according to whether the metal profile forms a beam or a column, in addition to Figure 1 andFigure 3 In addition to the tuning mass damper shown being arranged parallel to the length direction of the metal profile 1, the tuning mass damper can also be arranged perpendicular to the length direction of the metal profile 1, which can also achieve good technical effects and can be selected according to engineering needs. These are all simple changes based on the technical principle of the present utility model and are within the scope of protection required by the present utility model.

[0059] Based on the technical principles of Embodiment 1 and this example, the metal profiles applicable to the present utility model can be diverse. Typically, such as H-shaped profiles (i.e., H-beams), channel-shaped profiles (i.e., channel steels), I-shaped profiles (i.e., I-beams), T-shaped profiles (i.e., T-beams), multi-sided tubular profiles (such as triangular steel pipes, square steel pipes or rectangular steel pipes, etc.), circular tubular profiles (i.e., circular steel pipes), elliptical tubular profiles (i.e., elliptical steel pipes) or angle profiles (i.e., angle steels) made of steel materials commonly used in engineering. Of course, they can also be profiles of the above types made of aluminum alloy or other high-strength metal materials. Among them, profiles such as H-shaped profiles (i.e., H-beams), channel-shaped profiles (i.e., channel steels), I-shaped profiles (i.e., I-beams), etc. have both cantilever segments and connecting webs when viewed from the cross-section; profiles such as T-shaped profiles (i.e., T-beams) and angle profiles (i.e., angle steels) only have cantilever segments. Therefore, the present utility model has extremely strong applicability and practicability and can be applied to various fields and various types of steel structure buildings.

[0060] Embodiment 3

[0061] As Figure 3 shown, the present utility model is based on the low-noise composite structure of the metal profile. The difference from Embodiment 1 is that the tuning mass damper is composed of an outer frame 6, an elastic element 8 and a mass block 7. The mass block 7 is arranged in the chamber of the outer frame 6, and the elastic element 8 is arranged between the mass block 7 and the outer frame 6; the tuning mass damper 2 is magnetically fixed in the middle of the connecting web of the metal profile 1. Similarly, the tuning mass damper 2 is adhesively installed and arranged at intervals in the length direction of the metal profile 1 according to the position with the largest amplitude of the main vibration mode with a large noise contribution. The working frequencies of the tuning mass dampers correspond to the main vibration mode frequencies at the installation positions respectively.

[0062] Similar to Embodiment 1, adding a tuning mass damper at the connecting web of the metal profile can effectively absorb and consume the vibration energy transmitted from the external structural facilities to the metal profile, suppress the forced vibration and sound generation of the metal profile, avoid the occurrence of resonance, and control the intensity of the structure-borne noise generated by the vibration of the metal profile from the source.

[0063] Embodiment 4

[0064] As Figure 4The low-noise composite structure of the present utility model based on metal profiles shown is different from that in Embodiment 3 in that it further includes a sound insulation cover, which is formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The vibration suppression functional layer 15 is respectively arranged on the inner sides of the thin steel plates constituting the upper sound insulation cover body 9 and the lower sound insulation cover body 10. The upper sound insulation cover body 9 and the lower sound insulation cover body 10 are fixedly connected together by fasteners 11. In this example, the fasteners 11 are specifically rivets. In addition, sound absorption materials 5 are arranged in the cavity between the sound insulation cover and the metal profile 1. Specifically, the sound absorption materials 5 are foaming materials. Additionally, elastic vibration isolation members 4 are provided between the sound insulation cover 3 and the metal profile 1. Specifically, the elastic vibration isolation members 4 are composed of rubber elastic cushion blocks. Furthermore, the sound insulation cover 3 is made of thin steel plates, and a vibration suppression functional layer 15 composed of a layer of polyurethane damping material is coated on the inner side of the thin steel plates.

[0065] Compared with the sound insulation cover in Embodiment 2, the additional advantages of the sound insulation cover in the technical solution described in this example are as follows: Due to the adoption of a split structure, on the one hand, it is convenient for the pre-assembly operation, and on the other hand, it is also convenient for the later maintenance and replacement of the product. In addition, the sound insulation cover made of thin steel plates in this example has a wider range of material selection. Generally, steel plates with a thickness of 0.5 mm - 3 mm can meet the usage requirements of most projects, which is beneficial to reducing the material cost. In particular, after coating a damping material on the surface of the thin steel plate to form a vibration suppression functional layer, it can effectively prevent the vibration isolation cover from generating forced vibration and sound during use, which is beneficial to further improving the vibration reduction and noise reduction effect of the low-noise composite structure of the present utility model based on metal profiles. Additionally, by using a tuned mass damper with an outer frame, the connection and assembly of the tuned mass damper and the metal profile are more convenient, the vibration reduction performance of the product is more stable, and the service life is longer. Typically, as described in the Chinese invention patent with the patent authorization number ZL201310287705.1, the mass block 7 of the tuned mass damper in the present utility model can be entirely arranged in the outer frame 6 or partially arranged in the outer frame 6. Here, only a textual description is given. In this example, a layer of polyurethane damping material is coated on the inner surface of the thin steel plate to form a vibration suppression functional layer. In practical applications, the present utility model can also use other types of damping materials such as rubber to form the vibration suppression functional layer. And according to the different damping materials used, in addition to coating, other methods such as pasting and vulcanization can also be used to set the vibration suppression functional layer on the surface of the thin steel plate. Of course, in addition to setting the vibration suppression functional layer on the inner surface of the thin steel plate, the vibration suppression functional layer can also be set on the outer surface of the thin steel plate, or the vibration suppression functional layer can be set on both the inner and outer surfaces of the thin steel plate simultaneously, all of which can achieve good vibration reduction and noise reduction effects. Here, only a textual description is given and no additional drawings are provided, and all are within the scope of protection required by the present utility model.

[0066] It should be noted that in the technical solution described in this example, since an elastic vibration isolation member is added between the sound insulation cover and the metal profile, it can effectively prevent contact between the metal profile and the sound insulation cover during use, resulting in vibration short - circuit, with higher reliability and better vibration isolation and damping effects. In addition, the specific forms of the elastic vibration isolation members that can be used in the present utility model are diverse. It can be an elastic strip, an elastic cushion plate or an elastic cushion block made of an elastic material, etc., and the selectable elastic materials can also be diverse, such as elastic rubber, elastic polyurethane, etc., all of which can be applied to the present utility model and can be selected and used according to engineering needs in practice.

[0067] Embodiment Five

[0068] As Figure 5 shown, the low - noise composite structure of the present utility model based on the metal profile is different from that in Embodiment One in that a constrained damping structure is fixedly arranged on the local surface of the metal profile 1. The constrained damping structure includes a damping layer 12 and a constraint plate 13. Among them, the damping layer 12 is directly arranged on the surface of the metal profile 1, and the constraint plate 13 is arranged outside the damping layer 12. The constrained damping structure is arranged to avoid the tuned mass damper 2; in addition, the tuned mass damper is composed of an outer frame 6, an elastic element 8 and a mass block 7. The outer frame 6 of the tuned mass damper is fixedly connected to the wing plate at the end of the overhanging section of the metal profile 1 by using fastening bolts 23, so as to fix the tuned mass damper at the end of the overhanging section of the metal profile.

[0069] Compared with Embodiment One, in the technical solution described in this example, since a constrained damping structure is added to the surface of the metal profile, when the metal profile undergoes forced vibration, the constraint plate cooperates with the metal profile during the process of restricting the deformation of the damping layer to achieve shear energy dissipation of the damping layer, thereby converting the mechanical energy of the vibration into heat energy and dissipating it. Therefore, after adding the constrained damping structure to the surface of the metal profile, through the vibration reduction and noise reduction effect of the constrained damping structure, the vibration of the metal profile and the noise radiated from the surface of the metal profile can be further attenuated, so as to achieve a better sound - proof effect; in addition, since the sound insulation cover adopts a split - type structure, on the one hand, it is convenient for the pre - assembly operation, and on the other hand, it is also convenient for the later maintenance and replacement of the product; in addition, in this example, the tuned mass damper is fixed at the overhanging end of the metal profile by using fastening bolts, and the fixed connection is more convenient and reliable.

[0070] It should be noted that the constraint plate described in the present utility model can be a metal plate, a plastic plate, a composite material plate, or a spray - cured formed constraint covering layer, and its elastic modulus is more than 5 times that of the damping layer, which is hereby explained together.

[0071] Embodiment Six

[0072] As Figure 6The low-noise composite structure of the present utility model based on metal profiles, as shown, is different from that of the fifth embodiment in that it further includes a sound insulation cover, which is formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The vibration suppression functional layer 15 is respectively arranged on the inner sides of the thin steel plates forming the upper sound insulation cover body 9 and the lower sound insulation cover body 10. The upper sound insulation cover body 9 and the lower sound insulation cover body 10 are fixedly connected together by fasteners 11. In this example, the fasteners 11 are specifically rivets. In addition, sound-absorbing materials 5 are arranged in the cavity between the sound insulation cover and the metal profile 1. Specifically, the sound-absorbing materials 5 are mineral wool. Further, an elastic vibration isolation member 4 is arranged between the sound insulation cover 3 and the metal profile 1. Specifically, the elastic vibration isolation member 4 is composed of elastic pads made of elastic polyurethane material. Moreover, the sound insulation cover 3 is made of thin steel plates, and a vibration suppression functional layer 15 composed of a layer of rubber damping material is attached to the inner side of the thin steel plates.

[0073] The low-noise composite structure of the present utility model based on metal profiles in this example greatly reduces the vibration of the metal profiles themselves by setting a tuned mass damper and a constrained damping structure, reduces the noise intensity radiated by the metal profiles from the source, and then effectively absorbs and blocks the structure-borne noise generated by the metal profiles by using measures such as sound-absorbing materials and sound insulation covers. By combining these three methods, better vibration reduction and noise reduction effects can be achieved.

[0074] Embodiment Seven

[0075] As Figure 7 The low-noise composite structure of the present utility model based on metal profiles, as shown, is different from that of the fifth embodiment in that the tuned mass damper is adhesively fixed on the entire overhanging section and part of the connecting web surface of the metal profile 1 forming the beam and column. In addition, it further includes a spring clamp 14, and the tuned mass damper is clamped and fixed on the surface of the metal profile 1 by using the spring clamp 14.

[0076] Compared with the fifth embodiment, in the technical solution of this example, two fixing measures, namely adhesion and spring clamp, are simultaneously used to fix the tuned mass damper on the surface of the metal profile forming the beam and column, and reliable fixing effects can also be achieved. The greatest advantage of this fixing method is that it does not require drilling holes in the metal profile and will not affect the strength of the metal profile itself, so it has stronger applicability.

[0077] Based on the technical principle of this example, it can be seen that although the present utility model preferably arranges the tuned mass damper at the end of the overhanging section of the metal profile, in special cases such as when the size of the metal profile is small, restricted by engineering boundaries, or the local vibration is too strong, the present utility model does not exclude extending the arrangement position of the tuned mass damper from the end of the overhanging section or the middle of the connecting web to other parts, and it can be designed and adjusted according to engineering needs in practice.

[0078] It should be noted that in the present utility model, the fixed connection method between the tuned mass damper and the metal profile can be various, including adhesive fixation, magnetic attraction fixation, fastener fixation, spring clamp fixation, etc. Of course, the above-mentioned fixation methods can also be used in combination. For example, spring clamp combined fixation can be adopted while using adhesive fixation or magnetic attraction fixation. The fixation effect of the tuned mass damper with combined fixation measures is more guaranteed and the safety is better. These are all simple changes based on the technical principle of the present utility model and are within the protection scope required by the present utility model.

[0079] Of course, in order to further improve the ability to reduce the radiation noise intensity, based on the technical principle of Embodiment Six, as Figure 8 shown, a sound insulation cover can also be added. Sound absorption materials 5 are arranged in the cavity between the sound insulation cover and the metal profile 1, which is beneficial to achieving a better vibration and noise reduction effect. Such technical solutions are all simple changes based on the technical principle of the present utility model and are also within the protection scope required by the present utility model.

[0080] Embodiment Eight

[0081] As Figure 9 shown, the low-noise composite structure of the present utility model based on the metal profile is different from that of Embodiment Five in that tuned mass dampers 2 are simultaneously pasted and fixed at the ends of the overhanging sections of the upper and lower wing plates on one side of the metal profile 1. During application, the tuned mass dampers 2 are arranged in a staggered manner at the ends of the overhanging sections of the upper and lower wing plates on one side of the metal profile 1. Similarly, the constrained damping structure 17 is arranged in a staggered manner to avoid the tuned mass dampers 2 at the upper and lower wing plates; in addition, the constrained damping structure further includes a connecting plate 16. The connecting plate 16 is connected to the metal profile 1, and the damping layer 12 is arranged between the connecting plate 16 and the constraint plate 13. The constrained damping structure is arranged to avoid the tuned mass damper.

[0082] Compared with Embodiment Five, in the technical solution of this example, tuned mass dampers are simultaneously arranged on the upper and lower wing plates of the metal profile, which is beneficial to further improving the vibration reduction effect; in addition, a connecting plate is added to the constrained damping structure, providing more choices for the connection method between the constrained damping structure and the metal profile, and also being beneficial to further improving the noise reduction and vibration reduction performance.

[0083] Embodiment Nine

[0084] As Figure 10The low-noise composite structure of the present utility model based on metal profiles, which is different from that of the eighth embodiment, further includes a sound insulation cover. The sound insulation cover is formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The vibration suppression functional layer 15 is respectively arranged on the inner sides of the thin steel plates constituting the upper sound insulation cover body 9 and the lower sound insulation cover body 10. The upper sound insulation cover body 9 and the lower sound insulation cover body 10 are fixedly connected together by fasteners 11. The fasteners 11 are specifically bolts. The splicing part of the upper sound insulation cover body 9 and the lower sound insulation cover body 10 is located on the outer side of the wing plate of the metal profile 1. In addition, sound-absorbing material 5 is arranged in the cavity between the sound insulation cover and the metal profile 1. Specifically, the sound-absorbing material 5 is mineral wool. In addition, an elastic vibration isolation member 4 is arranged between the sound insulation cover 3 and the metal profile 1. Specifically, the elastic vibration isolation member 4 is composed of elastic pads made of elastic polyurethane material.

[0085] Compared with the eighth embodiment, in the technical solution described in this example, measures such as sound-absorbing materials and sound insulation covers can effectively absorb and block the structure-borne noise generated by metal profiles, which is beneficial to further improving the vibration reduction and noise reduction effect of the present utility model. In addition, compared with Figure 8 the split-type sound insulation cover shown in, in the technical solution described in this example, the splicing part of the upper sound insulation cover body and the lower sound insulation cover body is arranged on the outer side of the wing plate of the metal profile, which can effectively reduce the difficulty of connection operation, avoid damaging the internal structure of the sound insulation cover during the installation process. Most importantly, the disassembly and assembly of the sound insulation cover are more convenient and fast, and the maintenance is very convenient.

[0086] Embodiment Ten

[0087] As Figure 11 shown, the low-noise composite structure of the present utility model based on metal profiles, which is different from that of the ninth embodiment, is that tuned mass dampers are respectively fixedly arranged at the outer overhanging ends of the upper and lower wing plates on both sides of the metal profile, and the specific structures of the tuned mass dampers arranged at the upper wing plate and the lower wing plate on the same side of the connecting web of the metal profile are different. In the figure, on the right side of the connecting web of the metal profile, only one mass block 7 is arranged in the tuned mass damper arranged at the upper wing plate, and the tuned mass damper arranged at the lower wing plate contains multiple mass blocks 7 with different weights. In addition, constraint damping structures are respectively fixedly arranged on both sides of the connecting web of the metal profile. The constraint damping structure is specifically a labyrinth-type constraint damping structure. As Figure 12 shown in, the connecting plate 16 and the constraint plate 13 are correspondingly provided with mutually matching convex and concave structures, and the damping layer 12 is arranged between the connecting plate 16 and the constraint plate 13. In addition, when the sound-absorbing material 5 is arranged on both sides of the web of the metal profile, a local closed cavity 22 is jointly formed by the surface of the metal profile, the surface of the tuned mass damper and the sound-absorbing material 5.

[0088] In an application, the labyrinth constraint damping structure that can be adopted by the constraint damping structure can have various structural forms. Typically, it is the labyrinth constraint damping structure disclosed in the Chinese invention patent with the patent authorization number ZL200610012923.4.

[0089] Compared with Embodiment IX, in the technical solution described in this example, since a larger number and more types of tuned mass dampers are provided, it is possible to accurately control vibrations of different frequencies respectively, which is beneficial to further improving the vibration damping effect. In addition, since the labyrinth constraint damping structure is adopted, the system damping can be significantly increased, which is beneficial to further improving the vibration damping and noise reduction effects of the system. Moreover, in the technical solution described in this example, since a locally enclosed cavity is provided between the surface of the metal profile, the surface of the tuned mass damper and the sound-absorbing material, when the metal profile is forced to vibrate and its surface radiates vibration noise to the outside, the sound wave will be reflected and refracted multiple times in the locally enclosed cavity. Therefore, the energy of the radiated noise can be repeatedly absorbed by the sound-absorbing material, which is beneficial to better reducing the radiated noise. On the other hand, since a locally enclosed cavity is provided inside the sound insulation cover, the additional structural weight of the metal profile can be effectively reduced. At the same time, allowing the existence of an appropriate locally enclosed cavity also reduces the difficulty of filling the sound-absorbing material.

[0090] Embodiment XI

[0091] In the foregoing embodiments, the most commonly used H-shaped steel is mainly taken as a typical metal profile for illustration, and the installation method of fixedly arranging the tuned mass damper in the middle of the connecting web or at the end of the overhanging section of the flange is adopted. In actual applications, the metal profiles applicable to the present invention can be various, and the installation positions of the tuned mass dampers can also be various. For example, as Figure 13 shown in the low-noise composite structure based on the metal profile of the present invention, the difference from Embodiment III is that the metal profile 1 is specifically a channel steel. From the cross-sectional direction of the channel steel, the tuned mass dampers are respectively fixedly arranged at the ends of the overhanging sections of the upper and lower flanges of the channel steel and in the middle of the connecting web.

[0092] According to simulation calculation analysis and a large number of experimental verifications, it can be known that among common metal profiles, for open H-shaped profiles, I-shaped profiles, channel-shaped profiles, T-shaped profiles or angle-shaped profiles, when vibrations occur, in the cross-sectional direction of the above metal profiles, the positions with the largest amplitude usually occur at the ends of the overhanging sections of the flanges of the metal profile and in the middle of the connecting web. Arranging tuned mass dampers at these key positions can achieve a multiplier effect with the same total mass. Based on the above analysis results, Figure 13The tuned mass damper arrangement shown in can control the vibrations of the flange and the connecting web of the channel steel respectively by setting relatively independent tuned mass dampers. Although the number of tuned mass dampers used increases, the performance of the tuned mass dampers can be maximally exerted, which is conducive to significantly improving the vibration and noise reduction effect of the system.

[0093] Example Twelve

[0094] As Figure 13 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Example Eleven in that it further includes a sound insulation cover, which is formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The vibration suppression functional layer 15 is respectively arranged on the inner sides of the thin steel plates constituting the upper sound insulation cover body 9 and the lower sound insulation cover body 10. One side of the vibration suppression functional layer 15 is connected to the thin steel plate, and a vibration suppression restraint plate 18 is also arranged on the other side. The vibration suppression functional layer 15 and the vibration suppression restraint plate 18 together form a constrained damping structure on the surface of the thin steel plate. The upper sound insulation cover body 9 and the lower sound insulation cover body 10 are fixedly connected together by fasteners 11, and the fasteners 11 are specifically rivets; in addition, sound absorption materials 5 are arranged in the cavity between the sound insulation cover and the metal profile 1, and the specific sound absorption materials 5 are mineral wool; further, an elastic vibration isolation member 4 is arranged between the sound insulation cover 3 and the metal profile 1. Specifically, the elastic vibration isolation member 4 is composed of elastic pads made of elastic polyurethane material; furthermore, a locally enclosed cavity 22 is arranged between the surface of the channel steel, the surface of the tuned mass damper and the sound absorption materials 5.

[0095] In the technical solution described in this example, since a constrained damping structure is formed by respectively arranging a vibration suppression functional layer and a vibration suppression restraint plate on the thin steel plates of the upper and lower sound insulation cover bodies, the vibration and sound generation of the thin steel plates can be more effectively suppressed, which is conducive to further improving the sound insulation effect of the system. Also, since a locally enclosed cavity is arranged between the surface of the metal profile, the surface of the tuned mass damper and the sound absorption materials, when the metal profile vibrates under forced vibration and its surface radiates vibration noise to the outside, the sound waves will be reflected and refracted multiple times in the locally enclosed cavity. Therefore, the energy of the radiated noise can be repeatedly absorbed by the sound absorption materials, which is conducive to better reducing the radiated noise. On the other hand, since a locally enclosed cavity is arranged inside the sound insulation cover, the additional structural weight of the metal profile can also be effectively reduced.

[0096] It should be particularly noted that based on the arrangement of the tuned mass dampers in the technical solutions of the present utility model described in the foregoing examples and this example, in order to achieve the best vibration control effect, preferably, in the length direction of the metal profile, the tuned mass dampers are arranged at the positions with the largest amplitudes of the main vibration modes that contribute greatly to noise, and the working frequencies of the tuned mass dampers respectively correspond to the frequencies of the main vibration modes at the installation positions. In practical applications, it can be designed and arranged according to different types of metal profiles and actual engineering needs. For example, Typical Solution One: AsFigure 15 In the low-noise composite structure based on metal profiles of the present utility model shown, the metal profile 1 specifically uses an I-beam. Preferably, the tuned mass damper is fixedly arranged at the end of the overhanging section of the two side flanges of the I-beam. Of course, based on Figure 14 the technical principle described in Figure 16 shown, a sound insulation cover formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10 is additionally arranged outside the metal profile 1 formed by the I-beam. The vibration suppression functional layer 15 and the vibration suppression restraint plate 18 together form a constrained damping structure on the surface of the sound insulation cover. In addition, sound absorption material 5 is arranged in the cavity between the sound insulation cover and the metal profile 1. Furthermore, a locally enclosed cavity 22 is arranged between the surface of the I-beam, the surface of the tuned mass damper and the sound absorption material 5; Typical solution two: As Figure 17 shown, in the low-noise composite structure based on metal profiles of the present utility model, the metal profile 1 specifically uses a T-beam. Preferably, the tuned mass damper is fixedly arranged at the end of the overhanging section of the two side flanges of the T-beam. Of course, based on Figure 14 the technical principle described in Figure 18 shown, a sound insulation cover formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10 is additionally arranged outside the metal profile 1 formed by the T-beam. The vibration suppression functional layer 15 and the vibration suppression restraint plate 18 together form a constrained damping structure on the surface of the sound insulation cover. In addition, sound absorption material 5 is arranged in the cavity between the sound insulation cover and the metal profile 1. Furthermore, a locally enclosed cavity 22 is arranged between the surface of the T-beam, the surface of the tuned mass damper and the sound absorption material 5; Typical solution three: As Figure 19 shown, in the low-noise composite structure based on metal profiles of the present utility model, the metal profile 1 specifically uses an angle steel. Preferably, the tuned mass damper is fixedly arranged at the end of the overhanging section of the angle steel flange. Of course, based on Figure 14 the technical principle described in Figure 20 shown, a sound insulation cover formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10 is additionally arranged outside the metal profile 1 formed by the angle steel. The vibration suppression functional layer 15 and the vibration suppression restraint plate 18 together form a constrained damping structure on the surface of the sound insulation cover. In addition, sound absorption material 5 is arranged in the cavity between the sound insulation cover and the metal profile 1. Furthermore, a locally enclosed cavity 22 is arranged between the surface of the angle steel, the surface of the tuned mass damper and the sound absorption material 5. Of course, based on the above technical principle, for different metal profiles, different vibration sources and different vibration control requirements, the specific arrangement position of the tuned mass damper can also have many changes. For example, for H-beams, I-beams, channel steels or T-beams, the tuned mass damper can also be fixedly arranged only on the connecting web of the above metal profiles, or can also be fixedly arranged only at the end of a part of the overhanging section of the above metal profiles. These are all simple changes based on the technical principle of the present utility model. Only textual descriptions are given here and no additional drawings are provided one by one, and they are all within the protection scope required by the present utility model.

[0097] Embodiment Thirteen

[0098] As Figure 21 shown, the low-noise composite structure of the present utility model based on metal profiles is different from the technical solution shown in Figure 13 that the metal profile 1 is specifically a rectangular pipe made of aluminum alloy material; in addition, the tuned mass damper 2 is fixedly arranged on the outer surface of the metal profile 1. Specifically, the tuned mass damper 2 is arranged in the middle of each side of the rectangular pipe.

[0099] Since the tuned mass damper can effectively absorb the vibration energy transmitted from the external vibration source to the metal profile, the low-noise composite structure of the present utility model based on metal profiles described in this example can achieve good vibration reduction and noise reduction effects.

[0100] Based on the preferred layout principle of the tuned mass damper discussed in Embodiment Twelve, the tuned mass damper can also be arranged only in the middle of one side or several sides of the rectangular pipe to meet different vibration reduction requirements. This example takes the rectangular pipe as an example for illustration in the drawings. For other closed polygonal tubular profiles such as triangular pipes, square pipes, and trapezoidal pipes, the tuned mass damper can be arranged in the middle of at least one side of the tubular profile. These are all simple changes based on the technical principle of the present utility model and are only described in words here without further drawings, and they are all within the protection scope required by the present utility model.

[0101] It should be noted that based on the technical principle of this example, the metal profiles applicable to the present utility model are not only profiles made of steel materials but also profiles made of other high-strength metal materials such as aluminum alloy materials. This also applies to other technical solutions of the present utility model, which vary according to the actual projects in different fields.

[0102] Embodiment Fourteen

[0103] As Figure 21 shown, the low-noise composite structure of the present utility model based on metal profiles is different from Embodiment Thirteen in that it further includes a sound insulation cover formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The vibration suppression functional layer 15 and the vibration suppression constraint plate 18 together form a constrained damping structure on the surface of the sound insulation cover. In addition, sound absorption materials 5 are arranged in the cavity between the sound insulation cover and the metal profile 1, such as Figure 22 ; in addition, elastic vibration isolation members 4 are respectively arranged between the sound insulation cover and the metal profile 1 on both sides of the tuned mass damper 2. Specifically, the elastic vibration isolation members 4 are composed of elastic pads made of elastic rubber materials.

[0104] Compared with Embodiment Thirteen, since the sound insulation cover and sound absorption materials are added in the technical solution described in this example, the noise radiation can be better reduced, and the vibration reduction and noise reduction effects are better.

[0105] Example XV

[0106] As Figure 23 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Example XIII in that the metal profile 1 is a round steel pipe, and the tuned mass damper 2 is fixedly pasted on the outer surface of the round steel pipe wall along the axial direction of the round steel pipe.

[0107] Based on the same technical principle as in Example XIII, the technical solution in this example can also achieve good vibration and noise reduction effects, which will not be repeated here.

[0108] Example XVI

[0109] As Figure 24 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Example XV in that it further includes a sound insulation cover, which is formed by splicing an upper sound insulation cover body 9 and a lower sound insulation cover body 10. The splicing part of the upper sound insulation cover body 9 and the lower sound insulation cover body 10 extends outward corresponding to the middle part of the round steel pipe, and is fixedly connected together by a fastener 11 at the splicing part. Among them, both the upper sound insulation cover body 9 and the lower sound insulation cover body 10 are made of thin steel plates, and a vibration suppression functional layer 15 composed of a layer of polyurethane damping material is coated on the inner side of the thin steel plates; the elastic vibration isolator 4 is arranged between the round steel pipe and the upper and lower sound insulation cover bodies.

[0110] Compared with Example XV, since the technical solution in this example adds a sound insulation cover and sound absorption materials, it can better reduce noise radiation and has a better vibration and noise reduction effect.

[0111] Example XVII

[0112] As Figure 25 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Example XV in that the tuned mass damper composed of the outer frame 6, the elastic element 8 and the mass block 7 is processed into a semi-circular shape and is fixedly pasted and spliced along the circumferential direction on the surface of the round steel pipe.

[0113] The technical solution in this example can also achieve good vibration and noise reduction effects, which will not be repeated here.

[0114] Example XVIII

[0115] As Figure 26The utility model shown is a low-noise composite structure based on a metal profile, which differs from the seventeenth embodiment in that it also includes a sound insulation cover, which is composed of an upper sound insulation cover body 9 and a lower sound insulation cover body 10, and the joint of the upper sound insulation cover body 9 and the lower sound insulation cover body 10 extends outward corresponding to the middle of the round steel pipe, and is fixed together at the joint by a fastener 11, wherein the upper sound insulation cover body 9 and the lower sound insulation cover body 10 are both made of thin steel plates, and the inner side of the thin steel plates is coated with a vibration suppression functional layer 15 composed of a polyurethane damping material; the elastic vibration isolator 4 is arranged between the round steel pipe and the upper and lower sound insulation covers, and the elastic vibration isolator 4 is specifically an elastic strip made of elastic rubber material.

[0116] Compared with the seventeenth embodiment, since a soundproof cover and sound-absorbing materials are added to the technical solution described in this example, noise radiation can be better reduced and the vibration reduction and noise reduction effect is better.

[0117] Embodiment 19

[0118] like Figure 27 and Figure 28 The utility model shown is a low-noise composite structure based on a metal profile, which differs from the first embodiment in that it also includes a limit clamp, which is arranged at the ends of both sides of the tuned mass vibration absorber 2, and is fixedly connected to the metal profile 1 (H-shaped steel) and locks the relative spatial position of the tuned mass vibration absorber 2 and the metal profile 1. The limit clamp includes a U-shaped positioning clamp 19 and a positioning locking screw 21 connected and fixed to the H-shaped steel, and a limit retaining ring 20 welded and integrated with the U-shaped positioning clamp 19, and the limit retaining ring 20 partially surrounds the end of the tuned mass vibration absorber 2. It should be noted that under normal working conditions, the limit retaining ring 20 does not contact the tuned mass vibration absorber 2.

[0119] Compared with the first embodiment, the technical solution described in this example has an additional limit clamp, so even if the adhesive fixation of the tuned mass vibration absorber fails, it will not fall off from the surface of the H-beam, which greatly improves the reliability of the limit connection between the tuned mass vibration absorber and the H-beam, and can effectively prevent the tuned mass vibration absorber from accidentally falling off from the surface of the H-beam due to adhesive failure during use, causing damage to equipment or personnel, and safety is more guaranteed. In addition, since the limit clamp and the tuned mass vibration absorber adopt a contactless limit structure, under normal working conditions, the limit clamp and the tuned mass vibration absorber will not collide with each other and make noise. The limit clamp described in this example is particularly suitable for use conditions where vibration is strong and punching and fixing are not allowed. In addition to the H-beam mentioned above, it is also suitable for I-beams, angle irons, channels, rails and other metal profiles with wing plates, and has a wide range of application scenarios.

[0120] It should be noted that in the present utility model, the limit clamp can tune the mass contact vibration absorber to play an auxiliary fixing role; it can also not contact the tuned mass vibration absorber. When not in contact, since the limit fixture does not need to bear the vibration load of the tuned mass vibration absorber, the reliability is higher, and it purely plays a safety protection role against falling off.

[0121] Embodiment Twenty

[0122] As Figure 29 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Embodiment Nineteen in that it further includes a sound insulation cover 3. The sound insulation cover 3 is wrapped around the outside of the metal profile 1. The sound insulation cover 3 is made of thin steel plate. Sound absorption material 5 is arranged in the chamber between the sound insulation cover 3 and the metal profile 1. Specifically, the sound absorption material 5 is rock wool. Elastic vibration isolators 4 are arranged between the H-shaped steel and the upper and lower sound insulation cover bodies. The elastic vibration isolators 4 are specifically elastic cushion plates made of elastic rubber material.

[0123] Compared with Embodiment Nineteen, in the technical solution of this example, due to the addition of the sound insulation cover and the sound absorption material, the sound absorption material effectively absorbs the structure-borne noise generated by the vibration of the metal profile, and at the same time, the sound insulation cover effectively shields the structure-borne noise, greatly reducing the impact of the structure-borne noise of the metal profile on the surrounding environment; in addition, in the technical solution of this example, due to the addition of elastic vibration isolators between the sound insulation cover and the metal profile, it can effectively prevent the contact between the metal profile and the sound insulation cover during use, resulting in vibration short-circuit, with higher reliability and better vibration isolation and damping effect.

[0124] Embodiment Twenty - One

[0125] As Figure 30 and Figure 31 shown, the low-noise composite structure of the present utility model based on metal profiles is different from that of Embodiment Nineteen in that the limit fixture includes a limit baffle 24 surrounding the outside of the tuned mass vibration absorber 2. Outer stop strips 25 are respectively and fixedly arranged on both sides of the limit baffle 24 corresponding to the tuned mass vibration absorber 2. The limit baffle 24 is made of spring steel, and the limit baffle 24 is clamped and fixed on the metal profile 1. It should be noted that under normal working conditions, the limit baffle 24 and the outer stop strips 25 do not come into contact with the tuned mass vibration absorber 2.

[0126] Similar to Embodiment Nineteen, due to the setting of the limit baffle, even if the adhesive fixation of the tuned mass vibration absorber fails, it will not fall off from the surface of the H-shaped steel, greatly improving the reliability of the limit connection between the tuned mass vibration absorber and the H-shaped steel, and effectively preventing equipment or personal injuries caused by the accidental falling off of the tuned mass vibration absorber from the surface of the H-shaped steel due to adhesive failure during use, with more guaranteed safety.

[0127] Embodiment Twenty - Two

[0128] AsFigure 32 The low-noise composite structure of the present utility model based on metal profiles is different from that of the twenty-first embodiment in that, in the limit fixture, an elastic layer 26 made of rubber material is provided on the inner surface of the limit baffle 24. Contact occurs between the limit baffle 24 and the tuned mass damper 2 and between the limit baffle 24 and the metal profile 1 through the elastic layer 26, and the elastic layer 26 and the metal profile 1 are fixedly connected to each other by bonding.

[0129] Compared with the twenty-first embodiment, in the technical solution described in this example, since an elastic layer is added to the surface of the limit baffle, and the limit baffle contacts the tuned mass damper and the metal profile through the elastic layer, on the one hand, it can be used as an auxiliary fixing measure to strengthen the fixing connection effect between the tuned mass damper and the metal profile and improve the reliability and safety of the fixing connection; on the other hand, it can effectively avoid the generation of additional noise caused by the collision between the limit baffle and the tuned mass damper or the metal profile during use, which is beneficial to further improving the vibration and noise reduction performance of the product. Of course, based on the technical principle of this example, an elastic layer can also be locally provided only between the limit baffle and the tuned mass damper, and good technical effects can also be achieved. Here, only a textual description is given, which is also a simple change based on the technical principle of the present utility model and is within the protection scope required by the present utility model.

[0130] In addition, based on the foregoing technical principle of the present utility model, it can also be as Figure 33 shown, a sound insulation cover is added outside the metal profile 1. The sound insulation cover is composed of an upper sound insulation cover body 9 and a lower sound insulation cover body 10 that are spliced together and fixedly connected by fasteners 11. Among them, both the upper sound insulation cover body 9 and the lower sound insulation cover body 10 are made of thin steel plates, and a vibration suppression functional layer 15 composed of a layer of polyurethane damping material is coated on the inner side of the thin steel plates. In such technical solutions, due to the addition of the sound insulation cover and the sound absorption material, the noise radiation can be better reduced, and the vibration and noise reduction effect is better. Such technical solutions are also simple changes based on the technical principle of the present utility model and are within the protection scope required by the present utility model.

[0131] The embodiments in the present utility model are only for better explaining the technical solutions of the present utility model and should not be regarded as a limitation of the present utility model. The technical features in many embodiments can also be used crosswise. Based on the technical principle of the present utility model, those skilled in the art can re-combine the technical solutions described in the above embodiments or simply replace some components with similar technologies. As long as it is based on the technical principle of the present utility model, it is within the protection scope required by the present utility model.

Claims

1. A low-noise composite structure based on metal profiles, comprising beams and columns made of metal profiles, characterized in that It also includes a tuned mass vibration absorber. In the cross-sectional direction of the metal profile, for an open H-shaped profile, I-shaped profile, grooved profile, T-shaped profile or angled profile, the tuned mass vibration absorber is fixedly arranged at the end of the outer hanging section of the metal profile, or / and the tuned mass vibration absorber is fixedly arranged in the middle of the connecting web of the H-shaped profile, I-shaped profile or grooved profile; for a closed polygonal tubular profile, the tuned mass vibration absorber is fixedly arranged in the middle of at least one side of the tubular profile; for a circular tubular profile or an elliptical tubular profile, the tuned mass vibration absorber is fixedly arranged on the outer surface of the tube wall.

2. The low-noise composite structure based on metal profile according to claim 1, characterized in that It also includes a sound insulation cover, which covers the outside of the metal profile and the tuned mass vibration absorber, and a sound absorbing material is arranged in the cavity between the sound insulation cover and the metal profile.

3. The low-noise composite structure based on metal profile according to claim 1 or 2, characterized in that In the length direction of the metal profile, the tuned mass vibration absorber is arranged at the maximum amplitude position of the main vibration mode with large noise contribution, and the working frequency of the tuned mass vibration absorber corresponds to the main vibration mode frequency at the installation position.

4. The low-noise composite structure based on metal profile according to claim 1 or 2, characterized in that The invention also comprises a spring clamp, which clamps and fixes the tuned mass vibration absorber on the surface of the metal profile.

5. The low-noise composite structure based on metal profile according to claim 1 or 2, characterized in that The tuned mass absorber comprises an outer frame, an elastic element and at least one mass block, wherein the mass block is at least partially arranged in a cavity of the outer frame, and the elastic element is arranged between the mass block and the outer frame.

6. The low-noise composite structure based on metal profile according to claim 2, characterized in that An elastic vibration isolator is arranged between the sound insulation cover and the metal profile. The elastic vibration isolator is an elastic strip, an elastic pad or an elastic pad block made of elastic material.

7. The low-noise composite structure based on metal profile according to claim 2, characterized in that The sound insulation cover is made of a thin steel plate, and a vibration suppression functional layer composed of a damping material is pasted, vulcanized or coated on at least one side of the thin steel plate.

8. The low-noise composite structure based on metal profile according to claim 7, characterized in that One side of the vibration suppression functional layer is connected to the thin steel plate, and the other side is also provided with a vibration suppression constraint plate. The vibration suppression functional layer and the vibration suppression constraint plate together form a constraint damping structure on the surface of the thin steel plate.

9. The low-noise composite structure based on metal profile according to claim 2, characterized in that The sound insulation cover is composed of an upper sound insulation cover body and a lower sound insulation cover body, and the upper sound insulation cover body and the lower sound insulation cover body are fixed together by fasteners.

10. The low-noise composite structure based on metal profile according to claim 1 or 2, characterized in that A constrained damping structure is fixedly arranged on a local surface of the metal profile, and the constrained damping structure avoids the arrangement of a tuned mass vibration absorber.

11. The low-noise composite structure based on metal profile according to claim 10, characterized in that The constrained damping structure at least includes a damping layer and a constraining plate.

12. The low-noise composite structure based on metal profile according to claim 11, characterized in that The constrained damping structure also includes a connecting plate, which is connected to the metal profile, and a damping layer is arranged between the connecting plate and the constrained plate.

13. The low-noise composite structure based on metal profile according to claim 12, characterized in that The constrained damping structure is a labyrinth-type constrained damping structure, the connecting plate and the constraining plate are provided with corresponding convex and concave structures that cooperate with each other, and the damping layer is provided between the connecting plate and the constraining plate.

14. The low-noise composite structure based on metal profile according to claim 1 or 2, characterized in that It also includes a limiting clamp, which is fixedly connected to the metal profile and locks the relative spatial position of the tuned mass vibration absorber and the metal profile. The limiting clamp forms a non-contact limiting or a contact limiting through an elastic layer for the tuned mass vibration absorber.

15. The low-noise composite structure based on metal profile according to claim 14, characterized in that The limiting clamp comprises a U-shaped positioning clamp and a positioning locking screw connected and fixed to the metal profile, and a limiting retaining ring integrated with the U-shaped positioning clamp, and the limiting retaining ring surrounds the end of the tuned mass vibration absorber.

16. The low-noise composite structure based on metal profile according to claim 14, characterized in that The limit clamp comprises a limit baffle plate surrounding the outside of the tuned mass vibration absorber, outer baffle bars are fixedly arranged on the limit baffle plate at two sides corresponding to the tuned mass vibration absorber, and the limit baffle plate is clamped and fixed on the metal profile.

17. The low-noise composite structure based on metal profile according to claim 2, characterized in that A partially enclosed cavity is provided between the surface of the metal profile and the sound absorbing material, or a partially enclosed cavity is provided between the surface of the metal profile, the surface of the tuned mass vibration absorber and the sound absorbing material.

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