阅读说明：本技术 一种船用减振降噪结构板的设计方法和船舶 (Design method of marine vibration and noise reduction structural plate and ship ) 是由 朱旭志 梁德校 袁鹏 郭静 张浩稳 于 2021-10-21 设计创作，主要内容包括：本发明涉及船舶技术领域,尤其涉及一种船用减振降噪结构板的设计方法和船舶,船用减振降噪结构板的设计方法包括如下步骤：S1、根据设备在船体上的布置位置和固定所述设备的外形框架确定结构板的外形；S2、确定所述结构板的厚度；S3、根据所述设备产生的噪音音量确定在所述结构板上开设的噪音衰减孔的数量；S4、确定所述结构板在所述外形框架上安装的节点；S5、对板材进行加工。本发明利用结构板本身的刚度改变设备带来的振动的频率,从而避免共振,起到减振的效果,利用设置在结构板上的噪音衰减孔对设备产生的噪音进行衰减,从而在不安装防火隔音棉的情况下,可以降低噪音。(The invention relates to the technical field of ships, in particular to a design method of a marine vibration and noise reduction structural slab and a ship, wherein the design method of the marine vibration and noise reduction structural slab comprises the following steps: s1, determining the shape of the structural slab according to the arrangement position of the equipment on the ship body and the shape frame for fixing the equipment; s2, determining the thickness of the structural plate; s3, determining the number of the noise attenuation holes formed in the structural plate according to the volume of the noise generated by the equipment; s4, determining nodes of the structural plates installed on the outline frame; and S5, processing the plate. The invention utilizes the rigidity of the structural plate to change the vibration frequency brought by the equipment, thereby avoiding resonance and playing a role in vibration reduction, and utilizes the noise attenuation holes arranged on the structural plate to attenuate the noise generated by the equipment, thereby reducing the noise without installing fireproof soundproof cotton.)

1. A design method of a vibration and noise reduction structural slab for a ship is characterized by comprising the following steps:

s1, determining the shape of the structural slab (1) according to the arrangement position of the equipment (3) on the ship body and the shape frame (4) for fixing the equipment (3);

s2, determining the thickness of the structural plate (1);

s3, determining the number of the noise attenuation holes (11) formed in the structural plate (1) according to the volume of the noise generated by the equipment (3);

s4, determining the installation node of the structural board (1) on the outline frame (4);

and S5, processing the plate.

2. The design method of the marine vibration and noise reduction structural panel according to claim 1, wherein the step S1 further comprises determining the number of the reinforcing ribs (2) arranged on the structural panel (1) according to the shape of the structural panel (1).

3. The design method of the marine vibration and noise reduction structural plate according to claim 2, wherein in step S2, the thickness of the structural plate (1) is designed according to the magnitude of the excitation force generated by the equipment (3).

4. A design method of a marine vibration and noise reduction structural panel according to claim 3, wherein in the step S2, the thickness of the reinforcing ribs (2) and the installation position on the structural panel (1) are designed according to the magnitude of the exciting force generated by the equipment (3).

5. The design method of the marine vibration and noise reduction structural slab as claimed in claim 2, wherein the reinforcing ribs (2) are flat iron, flat ball steel or angle steel.

6. A design method of a marine vibration and noise reduction structural slab as claimed in claim 3, characterized in that said equipment (3) is provided with a detection sensor, said detection sensor is used for monitoring the excitation force of said equipment (3) in real time.

7. A design method of a marine vibration and noise reduction structural panel according to claim 1, characterized in that in step S3, the positions of the noise attenuation holes (11) formed on the structural panel (1) are determined according to the propagation path of the airflow of the noise generated by the equipment (3).

8. The method of claim 1, wherein in step S3, the hole wall surface of the noise attenuation hole (11) is rough, and fire-proof and sound-proof cotton is disposed in the noise attenuation hole (11).

9. The design method of the marine vibration and noise reduction structural slab as claimed in claim 1, wherein in step S5, the structural slab (1) is modeled in three dimensions, and the machining instruction is generated by using the three-dimensional model, and the plate is machined by using a numerical control machine.

10. A ship, characterized by comprising a structural panel (1), said structural panel (1) being designed using the design method of a marine vibration and noise reduction structural panel according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of ships, in particular to a design method of a vibration and noise reduction structural plate for a ship and the ship.

Background

When boats and ships are sailing, equipment on the ship can produce can vibrate and make a sound in the course of the work to bring uncomfortable sensation for personnel on the ship, influence crew and passenger's experience. However, during the navigation of the ship, the relevant equipment needs to be in an operating state in order to ensure the normal operation and safety of the ship. It is therefore necessary to provide corresponding devices on the ship to reduce vibration and noise levels.

Vibration and noise are two different ways of influencing, and usually different ways of dealing with different problems are adopted. For example, vibration problems, it is common to add structural plates to increase the structural stiffness and to change the natural frequency of the structure to avoid structural resonances; noise problems, fire-proof soundproof cotton is usually laid to absorb sound. However, for some devices, sometimes vibration and noise are generated simultaneously, for example, a fan, the conventional treatment method at present is to add a structural plate and a fireproof soundproof cotton respectively, but interference exists between the structural plate and the fireproof soundproof cotton, in addition, the required modification space is relatively large, the normal use and safety of the device are affected, and the consumed cost is high.

Therefore, a design method of a vibration and noise reduction structural panel for a ship and a ship are needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a design method of a vibration and noise reduction structural plate for a ship and the ship, which can reduce vibration and noise and simultaneously reduce input cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a design method of a vibration and noise reduction structural plate for a ship comprises the following steps:

s1, determining the shape of the structural slab according to the arrangement position of the equipment on the ship body and the shape frame for fixing the equipment;

s2, determining the thickness of the structural plate;

s3, determining the number of the noise attenuation holes formed in the structural plate according to the volume of the noise generated by the equipment;

s4, determining nodes of the structural plates installed on the outline frame;

and S5, processing the plate.

Further, the step S1 includes determining the number of the reinforcing ribs arranged on the structural plate according to the shape of the structural plate.

Further, in the step S2, the thickness of the structural plate is designed according to the magnitude of the exciting force generated by the device.

Further, in the step S2, the thickness of the reinforcing ribs and the mounting position on the structural plate are designed according to the magnitude of the exciting force generated by the device.

Further, the reinforcing ribs are flat irons, flat ball steels or angle steels.

Furthermore, a detection sensor is arranged on the equipment and used for monitoring the excitation force of the equipment in real time.

Further, in step S3, the position of the noise attenuation hole opened in the structural panel is determined according to the propagation path of the air flow of the noise generated by the device.

Further, in step S3, a hole wall surface of the noise attenuation hole is a rough surface, and fireproof soundproof cotton is provided in the noise attenuation hole.

Further, in step S5, a three-dimensional model is created according to the designed structural plate, a machining instruction is generated using the three-dimensional model, and the plate is machined using a numerical control machine.

A ship comprises a structural plate, and the structural plate is designed by using the design method of the ship vibration-damping and noise-reducing structural plate.

The invention has the beneficial effects that:

the design method of the marine vibration-damping and noise-reducing structural slab determines the shape of the structural slab according to the arrangement position of equipment and the shape frame of the equipment, determines the thickness of the structural slab, determines the number of noise attenuation holes formed in the structural slab according to the noise volume of the equipment, then determines the nodes installed on the shape frame, and carries out blanking processing on the slab. Utilize the rigidity of structural slab itself to change the frequency of the vibration that equipment brought to avoid resonating, play the effect of damping, utilize the noise attenuation pore pair equipment production that sets up on the structural slab to attenuate, thereby under the condition of not installing fire prevention soundproof cotton, can the noise reduction. The structural slab who designs in this application can play the damping and fall the effect of making an uproar, need not to use fire prevention soundproof cotton to the cost input has been reduced.

The ship provided by the invention comprises the structural plate, and the structural plate is designed by adopting the design method of the ship vibration and noise reduction structural plate, so that the vibration and noise reduction can be realized, and the input cost can be reduced.

Drawings

FIG. 1 is a flow chart of a design method of a vibration and noise reduction structure plate for a ship according to the present invention;

FIG. 2 is a layout view of a marine vibration/noise reduction structure plate according to the present invention;

fig. 3 is a view from a-a in fig. 2.

In the figure:

1. a structural panel; 11. a noise attenuation hole; 2. reinforcing ribs; 3. equipment; 4. a form frame.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable 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.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

When boats and ships are sailing, equipment on the ship can produce can vibrate and make a sound in the course of the work to bring uncomfortable sensation for personnel on the ship, influence crew and passenger's experience. However, during the navigation of the ship, the relevant equipment needs to be in an operating state in order to ensure the normal operation and safety of the ship. It is therefore necessary to provide corresponding devices on the ship to reduce vibration and noise levels.

In order to reduce the input cost while realizing vibration and noise reduction, the invention provides a design method of a vibration and noise reduction structural plate for a ship, as shown in fig. 1-3. The design method of the vibration and noise reduction structural plate for the ship comprises the following steps:

s1, determining the shape of the structural slab 1 according to the arrangement position of the equipment 3 on the ship body and the shape frame 4 of the fixed equipment 3; specifically, the length and width dimensions of the structural panel 1 are determined by the outer frame 4 of the mounting device 3.

S2, determining the thickness of the structural plate 1; since the thickness of the structural panel 1 directly affects the rigidity of the structural panel 1, the effect of changing the vibration frequency is affected. In the present embodiment, the thickness of the structural panel 1 is designed according to the magnitude of the exciting force generated by the device 3.

S3, determining the number of the noise attenuation holes 11 formed in the structural plate 1 according to the volume of the noise generated by the equipment 3;

s4, determining the node of the structural plate 1 mounted on the outer frame 4; specifically, the structural plate 1 is welded on the outer shape frame 4, so that the stability of the fixed connection between the structural plate 1 and the outer shape frame 4 is ensured, and the structural plate cannot be disconnected from the outer shape frame 4 even if the vibration generated by the equipment 3 is large.

And S5, processing the plate.

Utilize the rigidity of structural slab 1 itself to change the frequency of the vibration that equipment 3 brought to avoid resonating, play the effect of damping, utilize the noise attenuation hole 11 that sets up on structural slab 1 to attenuate the noise that equipment 3 produced, thereby under the condition of not installing fire prevention soundproof cotton, can the noise reduction. The structural slab 1 that designs in this application can play the damping and fall the effect of making an uproar, need not to use fire prevention soundproof cotton to the cost input has been reduced.

Further, step S1 includes determining the number of the reinforcing ribs 2 arranged on the structural panel 1 according to the outer shape of the structural panel 1. Through arranging strengthening rib 2 on structural slab 1, can further promote structural slab 1's intensity and rigidity through setting up strengthening rib 2 to can play the effect that changes the frequency of shaking better.

Further, in step S2, the thickness of the reinforcing beads 2 and the position of attachment to the structural panel 1 are designed according to the magnitude of the exciting force generated by the device 3. Through the mode, the arrangement of the reinforcing ribs 2 can be optimized, and the size of the reinforcing ribs 2 is optimized. In the present embodiment, the reinforcing ribs 2 are arranged at intervals of 600mm on one side of the structural panel 1. In other embodiments, the setting may be performed according to the excitation force of the device 3, and is not limited herein.

Specifically, the reinforcing ribs 2 are flat iron, flat ball steel or angle steel commonly used in shipyards.

Further, a detection sensor is arranged on the device 3, and the detection sensor is used for monitoring the excitation force of the device 3 in real time. Specifically, the detection sensor can adopt a pressure sensor, the pressure sensor collects the exciting force generated in the working process of the equipment 3 in real time, the thicknesses of the structural plate 1 and the reinforcing ribs 2 are determined according to the size of the exciting force, the thicknesses of the structural plate 1 with large exciting force and the thicknesses of the reinforcing ribs 2 are correspondingly larger, and the thicknesses of the structural plate 1 with large exciting force and the thicknesses of the reinforcing ribs 2 are smaller. Accurate parameters can be provided for designing the structural plate 1 and the reinforcing ribs 2 by monitoring the exciting force.

Further, in step S3, the positions of the noise attenuation holes 11 opened in the structural panel 1 are determined based on the propagation path of the airflow of the noise generated by the device 3. Through the arrangement, the noise can be directly attenuated by the noise attenuation holes 11, so that the volume of the noise is reduced, and the influence caused by the noise is reduced. Specifically, the aperture of the noise attenuation holes 11 is 100mm, the noise attenuation holes are arranged at intervals of 100mm, the adjacent noise attenuation holes 11 are arranged in a staggered manner, and the structural plate 1 is arranged right above the equipment 3. In other embodiments, the arrangement and the aperture of the noise attenuation holes 11 may be adjusted according to actual needs, and are not limited herein.

Further, in step S3, the hole wall surface of the noise attenuation hole 11 is a rough surface, and the fireproof soundproof cotton is provided in the noise attenuation hole 11. Utilize the coarse wall to carry out diffuse reflection to the noise, play the effect of decay at the in-process of repeated reflection to the noise, be provided with the fire prevention soundproof cotton in noise attenuation hole 11 and can absorb the noise, further promote the attenuating effect of noise.

Further, in step S5, a three-dimensional model is created from the designed structural panel 1, a machining instruction is generated using the three-dimensional model, and the panel is machined using a numerically controlled machine tool. Through the mode, the difficulty of processing can be reduced, the rapid processing is facilitated, and the efficiency of processing plates is improved.

The embodiment also provides a ship, which comprises the structural plate 1, wherein the structural plate 1 is designed by using the design method of the ship vibration and noise reduction structural plate 1, so that the input cost is reduced while vibration and noise are reduced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.