Vibration isolation device based on acoustic black hole structure and ship system
阅读说明:本技术 基于声学黑洞结构的隔振装置及船舶系统 (Vibration isolation device based on acoustic black hole structure and ship system ) 是由 代路 王苇 林原胜 柯志武 劳星胜 吕伟剑 赵振兴 吴君 马灿 戴春辉 柳勇 于 2020-05-28 设计创作,主要内容包括:本发明涉及隔振技术领域,公开了一种基于声学黑洞结构的隔振装置及船舶系统,其中隔振装置包括支撑结构,所述支撑结构用于设置在振源设备和安装基座之间,所述支撑结构上构造有若干个声学黑洞结构,所述声学黑洞结构连接有局域振子组件。本发明提供的一种基于声学黑洞结构的隔振装置及船舶系统,通过支撑结构上的声学黑洞结构,将振源设备传递的振动能量汇聚于声学黑洞结构,实现振动能量的高效聚集,在此基础上,通过在声学黑洞结构处安装局域振子组件,能够实现振动能量的高效吸收,从而在振源设备的振动传递过程中,有效提升振动隔离效果。(The invention relates to the technical field of vibration isolation, and discloses a vibration isolation device based on an acoustic black hole structure and a ship system. According to the vibration isolation device based on the acoustic black hole structure and the ship system, the vibration energy transmitted by the vibration source equipment is gathered to the acoustic black hole structure through the acoustic black hole structure on the supporting structure, so that the efficient gathering of the vibration energy is realized, on the basis, the local vibrator component is arranged at the acoustic black hole structure, so that the efficient absorption of the vibration energy can be realized, and the vibration isolation effect is effectively improved in the vibration transmission process of the vibration source equipment.)
1. The vibration isolation device based on the acoustic black hole structure is characterized by comprising a supporting structure, wherein the supporting structure is used for being arranged between vibration source equipment and a mounting base, a plurality of acoustic black hole structures are constructed on the supporting structure, and the acoustic black hole structures are connected with local oscillator components.
2. The acoustic black hole structure-based vibration isolation device according to claim 1, wherein a number of the acoustic black hole structures are uniformly distributed on the support structure.
3. The acoustic black hole structure-based vibration isolation device according to claim 1, wherein the upper and lower surfaces of the acoustic black hole structure are respectively provided with damping coatings.
4. The vibration isolation device based on the acoustic black hole structure according to any one of claims 1 to 3, wherein the upper and lower surfaces of the acoustic black hole structure are concave respectively, and the thickness of the acoustic black hole structure increases continuously from the middle to the edge.
5. The acoustic black hole structure-based vibration isolation device according to claim 4, wherein a supporting platform with a uniform thickness is formed at the middle part of the acoustic black hole structure.
6. The acoustic black hole structure-based vibration isolation device according to claim 5, wherein the local oscillator component is connected to the support platform.
7. The acoustic black hole structure-based vibration isolation device according to any one of claims 1 to 3, wherein the local oscillator component is connected above or below the acoustic black hole structure.
8. The acoustic black hole structure-based vibration isolation device according to any one of claims 1 to 3, wherein the local oscillator assembly comprises a supporting spring and a mass, one end of the supporting spring is connected to the acoustic black hole structure, and the other end of the supporting spring is connected to the mass.
9. The acoustic black hole structure-based vibration isolation device according to any one of claims 1 to 3, wherein an upper vibration isolator for connecting with a vibration source device is connected to the upper surface of the supporting structure, and a lower vibration isolator for connecting with a mounting base is connected to the lower surface of the supporting structure.
10. A marine system comprising the acoustic black hole structure-based vibration isolation apparatus according to any one of claims 1 to 9, further comprising a vibration source device, a mounting base, and a marine hull, wherein the vibration isolation apparatus is disposed between the vibration source device and the mounting base, and the mounting base is fixed to the marine hull.
Technical Field
The invention relates to the technical field of vibration isolation, in particular to a vibration isolation device based on an acoustic black hole structure and a ship system.
Background
The power machine is the most important vibration noise source of the ship, the violent vibration can cause the fatigue damage of the structure, induce the mechanical failure and reduce the performance and the safe reliability of the power machine, more importantly, the vibration of the power machine is transmitted to the ship body through the vibration absorber, the vibration of the ship body causes the underwater radiation noise, the excessive radiation noise can influence the sound self-guidance and guidance of the underwater ship, and is easy to expose itself, the self sound stealth is reduced, and the power machine becomes an important factor influencing the ship concealment and the vitality.
The vibration isolation technology is considered as a main technical means for controlling vibration transmission of mechanical equipment, however, the traditional vibration isolation technology has certain limitations. In order to improve the low-frequency vibration isolation effect, the vibration absorber needs to have low enough rigidity, and simultaneously has larger static rigidity in order to ensure certain bearing capacity and stability, so that the traditional passive vibration isolation technology can effectively isolate medium-high frequency vibration of mechanical equipment, but has poor control effect on the low-frequency vibration, and for a ship, underwater radiation noise generated by the low-frequency vibration has vital influence on the concealment and vitality of the ship due to the fact that the propagation distance is long and the attenuation is not easy. Theoretically, the active vibration isolation technology can effectively control low-frequency vibration, but because the active control system is an electromechanical integrated system, the system is complex and expensive, and is influenced and limited by various factors such as installation space, weight and the like, the engineering application of the active vibration isolation technology in the field of domestic ships faces great difficulty at present.
The traditional vibration isolation technology at present has the problems of poor control effect on low-frequency vibration and incapability of meeting the vibration isolation requirement of ship mechanical equipment.
Disclosure of Invention
The embodiment of the invention provides a vibration isolation device based on an acoustic black hole structure and a ship system, which are used for solving or partially solving the problems that the conventional vibration isolation technology has poor control effect on low-frequency vibration and can not meet the vibration isolation requirement of ship mechanical equipment.
The embodiment of the invention provides a vibration isolation device based on an acoustic black hole structure, which comprises a supporting structure, wherein the supporting structure is arranged between vibration source equipment and an installation base, a plurality of acoustic black hole structures are constructed on the supporting structure, and the acoustic black hole structures are connected with local oscillator components.
On the basis of the scheme, the plurality of acoustic black hole structures are uniformly distributed on the supporting structure.
On the basis of the scheme, the upper surface and the lower surface of the acoustic black hole structure are respectively provided with a damping coating.
On the basis of the scheme, the upper surface and the lower surface of the acoustic black hole structure are respectively concave, and the thickness of the acoustic black hole structure is continuously increased from the middle to the edge.
On the basis of the scheme, a supporting platform with uniform thickness is formed in the middle of the acoustic black hole structure.
On the basis of the scheme, the local oscillator component is connected to the supporting platform.
On the basis of the scheme, the local oscillator component is connected above or below the acoustic black hole structure.
On the basis of the scheme, the local oscillator component comprises a supporting spring and a mass block, wherein one end of the supporting spring is connected with the acoustic black hole structure, and the other end of the supporting spring is connected with the mass block.
On the basis of the scheme, the upper surface of the supporting structure is connected with an upper-layer vibration isolator used for being connected with vibration source equipment, and the lower surface of the supporting structure is connected with a lower-layer vibration isolator used for being connected with a mounting base.
The embodiment of the invention provides a ship system which comprises the vibration isolation device based on the acoustic black hole structure, vibration source equipment, an installation base and a ship shell, wherein the vibration isolation device is arranged between the vibration source equipment and the installation base, and the installation base is fixed on the ship shell.
According to the vibration isolation device based on the acoustic black hole structure and the ship system, the vibration energy transmitted by the vibration source equipment is gathered to the acoustic black hole structure through the acoustic black hole structure on the supporting structure, so that the efficient gathering of the vibration energy is realized, on the basis, the local vibrator assembly is arranged at the acoustic black hole structure, so that the efficient absorption of the vibration energy can be realized, and the vibration isolation effect is effectively improved in the vibration transmission process of the vibration source equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is an overall connection schematic diagram of a vibration isolation device based on an acoustic black hole structure according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an acoustic black hole structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the distribution of the acoustic black hole structure on the support structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a support structure in an embodiment of the invention.
Description of reference numerals:
wherein, 1, a vibration source device; 2. an upper vibration isolator; 3. a support structure; 4. an acoustic black hole structure; 5. a damping coating; 6. a local oscillator assembly; 6a, a mass block; 6b, a support spring; 7. a lower layer vibration isolator; 8. mounting a base; 9. a hull of the vessel; 10. a support platform; 11. areas of smoothly varying thickness.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides a vibration isolation device based on an acoustic black hole structure, the vibration isolation device includes a
An acoustic
The utility model provides a vibration isolation mounting based on acoustics black hole structure, through acoustics
The supporting
Further, the supporting
On the basis of the above embodiment, further, with reference to fig. 3, several acoustic
Further, a
The distribution of the acoustic
Further, referring to fig. 3, in the present embodiment, the
On the basis of the above embodiment, further, referring to fig. 2, the upper and lower surfaces of the acoustic
On the basis of the above embodiment, further, the upper and lower surfaces of the acoustic
On the basis of the above embodiment, further, the supporting platform 10 with uniform thickness is formed in the middle of the acoustic
On the basis of the above embodiment, further, the
Specifically, the acoustic
The thickness smooth change area 11 enables the local structure impedance of the supporting
In the embodiment, the acoustic
On the basis of the above embodiment, further, referring to fig. 4, the
On the basis of the above embodiment, further, the
Referring to fig. 1 and 4, the
On the basis of the above embodiment, the upper surface of the supporting
On the basis of the above embodiments, further, referring to fig. 1, the present embodiment provides a ship system, which includes the vibration isolation device based on the acoustic
On the basis of the above embodiments, further, in the present embodiment, in order to overcome the defects of the current ship power machine vibration isolation technology, a ship power machine vibration isolation system having low-frequency broadband performance, small additional influence, and low cost is provided. The utility model discloses a vibration isolation device based on acoustics
This embodiment can realize the high-efficient gathering of vibration energy through acoustics
In the embodiment, the acoustic
In the embodiment, the distribution of the acoustic
The
The number, size and distribution of the acoustic
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
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