WO2021056977A1

WO2021056977A1 - Pipeline vibration control method, computer device, storage medium and pipeline system

Info

Publication number: WO2021056977A1
Application number: PCT/CN2020/078846
Authority: WO
Inventors: 张仁亮; 刘开胜; 代斌; 牟珊珊; 覃毅
Original assignee: 重庆美的通用制冷设备有限公司
Priority date: 2019-09-24
Filing date: 2020-03-11
Publication date: 2021-04-01
Also published as: CN110674560A

Abstract

A pipeline vibration control method, a computer device, a storage medium and a pipeline system. The pipeline vibration control method comprises: performing modal analysis on a pipeline, and deriving the modal vibration shape of the pipeline therefrom (S102); and determining candidate damping parts of the pipeline according to the modal vibration shape, so as to arrange particle dampers at the candidate damping parts, wherein the amplitude of the candidate damping parts exceeds the amplitude of non-candidate damping parts of the pipeline (S104). According to the pipeline vibration control method, simulation analysis is firstly carried out on a pipeline, and a vibration and stress control scheme is then rapidly obtained according to a simulation analysis result. According to the method, actual vibration and stress tests do not need to be carried out before a specific scheme is determined, such that a sample or prototype does not need to be produced in advance, thereby reducing the related costs, and reducing physical structural changes. In addition, the particle dampers can be applied outside a pipeline structure, and the original pipeline structure does not need to be changed, thereby shortening the product development period, and reducing the development costs.

Description

Pipeline vibration control method, computer equipment, storage medium and pipeline system

Cross-references to related applications

This application is filed based on a Chinese patent application with an application number of 201910902537.X and an application date of September 24, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application relates to the technical field of vibration control, and specifically to a pipeline vibration control method, a computer device, a computer-readable storage medium, a pipeline system, and a refrigeration device.

Background technique

Pipelines are used to transfer fluids between different structures and have a wide range of applications. In the prior art, due to the application environment and the characteristics of the pipeline itself, the pipeline is often prone to vibration, such as the vibration of the pipeline caused by the vibration of the compressor and the pressure pulsation of the refrigerant in the pipeline system in the air conditioner. These vibrations may cause greater stress in the pipeline to break and leak, or cause local fatigue to cause leakage problems, resulting in an increase in the maintenance rate of the equipment, and also bring obstacles to the stable operation of the equipment and cause losses to the enterprise. Therefore, the problem of vibration and stress control of pipelines has become increasingly prominent.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art.

To this end, the first aspect of the present application provides a pipeline vibration control method.

The second aspect of the application provides a computer device.

The third aspect of the present application provides a computer-readable storage medium.

The fourth aspect of the present application provides a pipeline system.

The fifth aspect of the present application provides a refrigeration equipment.

In view of this, according to the first aspect of the present application, a pipeline vibration control method is provided, which includes: performing modal analysis on the pipeline to derive the modal vibration shape of the pipeline; and determining the pipeline vibration according to the modal vibration shape. Candidate damping parts for setting particle dampers at candidate damping parts, and the amplitude of the candidate damping parts exceeds the amplitude of the non-candidate damping parts of the pipeline.

In the pipeline vibration control method provided by the embodiments of the present application, the pipeline is firstly simulated and analyzed, and then the vibration and stress control plan is quickly obtained according to the simulation analysis result, and a particle damper can be installed at a portion of the pipeline with a large amplitude. This method does not require actual vibration and stress testing before determining the specific plan, so there is no need to produce samples or prototypes in advance, which reduces related costs and reduces physical structure changes. In addition, this solution uses the damping effect of the particle damper to suppress pipeline vibration and reduce stress. Due to the stable physical properties of the material, high temperature and low temperature resistance, the particle damper is suitable for harsh working conditions where traditional dampers cannot work-it can be used normally at temperatures below the melting point of the particle material and the cavity wall material, so it can be suitable for special working conditions Under the pipeline, such as high temperature pipeline and low temperature pipeline in refrigeration equipment; particle dampers also have the advantages of small additional mass and simple structure. Therefore, compared with traditional dampers that require additional installation structures, they can be installed in the pipeline structure. External application has little impact on the pipeline, no need to change the original pipeline structure, reducing structural changes, shortening the product development cycle, and reducing development costs.

In addition, the pipeline vibration control method provided according to the above technical solution of the present application also has the following additional technical features:

In some possible designs, the operation of determining the candidate damping position of the pipeline according to the mode shape includes: obtaining the control frequency band range; selecting the control mode shape from the mode shape according to the control frequency band range; determining according to the control mode shape Candidate damping position of the pipeline.

In this design, how to determine the candidate damping position is specifically defined. By not directly analyzing the entire mode shape, but first obtaining the control frequency band range, and selecting the control mode shape based on this, and then using the control mode shape to analyze the candidate damping parts, on the one hand, it can reduce the amount of analysis data and improve the data of the hardware equipment. Processing efficiency, on the other hand, you can select a specific frequency range to perform targeted vibration and stress control of the pipeline, which not only helps to optimize the control effect, but also reduces the number of particle dampers.

In some possible designs, the modal vibration shape includes the corresponding natural frequency and the natural vibration shape. The step of filtering the control vibration shape from the modal vibration shape according to the control frequency band range includes: determining the natural frequency within the control frequency band Frequency is recorded as the control natural frequency, and the control natural frequency and its corresponding natural mode are recorded as the control mode.

In this design, how to select and control the mode shape is specifically limited. The modal vibration shape of the pipeline includes multiple natural frequencies of the pipeline and the natural vibration shape at each natural frequency. By comparing the control frequency band, select the multiple natural frequencies in the control frequency band from the multiple natural frequencies of the modal vibration shape. The natural frequency is used as the control natural frequency, and the control mode including the control natural frequency and its corresponding natural mode can be obtained, and the scheme is simple and reliable.

In some possible designs, the pipeline vibration control method further includes: obtaining a set damping quantity as the quantity of candidate damping parts to be determined.

In this design, it is further restricted that the set damping quantity can be obtained to determine the number of candidate damping positions accordingly, that is, the number of candidate damping positions finally determined can be adjusted, which improves the flexibility of the scheme.

In some possible designs, the pipeline vibration control method further includes: outputting all determined candidate damping positions in order of amplitude.

In this design, it is further restricted that all candidate damping positions can be output in order of amplitude, which provides a reference for designers and developers to set up particle dampers as needed.

In some possible designs, the pipeline vibration control method further includes: outputting all the determined candidate damping positions and their amplitudes.

In this design, the output of all candidate damping positions and their amplitudes is further limited, so that designers and developers can fully understand the vibration of the pipeline, and then provide designers and developers with more comprehensive reference data to set particle dampers as needed .

In some possible designs, the operation of determining the candidate damping part of the pipeline according to the modal shape includes: obtaining the amplitude threshold; determining the part of the pipeline whose amplitude is greater than or equal to the amplitude threshold according to the modal shape, and recording it as the candidate damping part .

In this design, the scheme of determining the candidate damping position with the aid of the amplitude threshold is specifically defined. By obtaining the amplitude threshold, the parts whose amplitude exceeds the amplitude threshold can be recorded as candidate damping parts, realizing quantitative analysis of pipeline amplitude, and improving the flexibility and adaptability of the scheme.

In some possible designs, the operation of modal analysis on the pipeline includes: establishing or obtaining a three-dimensional model of the pipeline, and performing modal analysis on the three-dimensional model.

In this design, when the modal analysis of the pipeline is specifically restricted, the 3D model of the pipeline can be obtained by combining the 3D modeling, and then the modal analysis of the 3D model is performed. Because the vibration and stress control schemes are obtained through "modeling-simulation analysis", special knowledge of particle damping is not required, which facilitates the popularization and implementation of methods and technologies. Among them, a new 3D model can be established based on 3D modeling software during analysis, or an already established 3D model can be directly obtained, which improves the flexibility of the scheme.

In some possible designs, the pipeline vibration control method also includes: receiving parameter information of candidate particle dampers; according to the parameter information, modal analysis is performed on the pipeline with candidate particle dampers at the candidate damping position, and the optimized modal is derived Mode shape.

In this design, it is further defined that the pipeline vibration control method also includes the modal analysis combined with the particle damper. By receiving the parameter information of the candidate particle dampers and performing modal analysis on the pipeline after the candidate particle dampers are set, the optimized modal shape can be obtained, which can simulate setting the specified candidate particle dampers at the specified candidate damping positions Afterwards, control the effect of pipeline vibration and stress, and screen the control plan accordingly, further reduce the related vibration and stress test, and reduce the related expenses.

According to a second aspect of the present application, there is provided a computer device, including: a memory configured to store a computer program; a processor configured to execute the stored computer program to implement the pipeline vibration control according to any of the above technical solutions The steps of the method therefore have all the beneficial technical effects of the above-mentioned pipeline vibration control method, and will not be repeated here.

According to a third aspect of the present application, there is provided a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the pipeline vibration control method as described in any of the above technical solutions are implemented, Therefore, it has all the beneficial technical effects of the above-mentioned pipeline vibration control method, which will not be repeated here.

According to the fourth aspect of the present application, a pipeline system is provided, including a pipeline and a particle damper. The particle damper is arranged at a candidate damping position of the pipeline, and the candidate damping position is composed of the pipeline as described in any of the above technical solutions. Road vibration control method is obtained.

In the piping system provided by the embodiments of the present application, particle dampers are provided at the candidate damping positions of the pipeline obtained by the above-mentioned pipeline vibration control method, which can effectively suppress pipeline vibration, reduce stress, and reduce pipeline fracture and leakage. Risks improve the reliability of the piping system and prolong the service life of the piping system. Due to the adoption of the above pipeline vibration control method, the pipeline system also has the beneficial effects of short product development cycle and low development cost.

According to the fifth aspect of the present application, a refrigeration device is provided, which includes the piping system as described in the above technical solution, and thus has the beneficial technical effects of the piping system, which will not be repeated here.

In some possible designs, the refrigeration equipment also includes a compressor, which communicates with the pipeline.

In this design, it is further defined that the refrigeration equipment also includes a compressor, which is used to compress gaseous refrigerant. The pipeline directly connected to the compressor is easily affected by the vibration of the compressor and vibrates. By analyzing the candidate damping position of the pipeline The particle dampers can be installed to significantly improve the vibration and stress, reduce the risk of pipeline fracture and leakage, and improve the structural reliability of the refrigeration equipment.

The additional aspects and advantages according to the present application will be given in the following description part, and some will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 shows a schematic flowchart of a vibration control method according to an embodiment of the present application;

Fig. 2 shows a schematic flowchart of a vibration control method according to another embodiment of the present application;

FIG. 3 shows a schematic flow chart of the vibration control method of Embodiment 1 of the present application;

FIG. 4 shows a schematic flowchart of the vibration control method of the second embodiment of the present application;

FIG. 5 shows a schematic flow chart of the vibration control method of the third embodiment of the present application;

Fig. 6 shows a schematic diagram of a three-dimensional pipeline model of a specific embodiment of the present application;

FIG. 7 shows a schematic diagram of a pipeline simulation analysis model of a specific embodiment of the present application;

FIG. 8 shows the natural vibration mode of the pipeline of a specific embodiment of the present application at the first-order natural frequency within the control frequency band;

Fig. 9 shows the natural vibration mode of the pipeline of a specific embodiment of the present application at the second-order natural frequency within the control frequency band;

FIG. 10 shows the natural vibration mode of the pipeline of a specific embodiment of the present application at the third-order natural frequency within the control frequency band;

FIG. 11 shows a comparison curve diagram of acceleration response of a pipeline of a specific embodiment of the present application with or without a particle damper;

Fig. 12 shows a schematic structural diagram of a computer device according to an embodiment of the present application.

detailed description

In order to be able to understand the above objectives, features and advantages of the application more clearly, the application will be further described in detail below with reference to the accompanying drawings and specific implementations. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the following description, many specific details are set forth in order to fully understand this application. However, this application can also be implemented in other ways different from those described here. Therefore, the scope of protection of this application is not subject to the specific implementations disclosed below. Limitations of cases.

The embodiment of the first aspect of the present application provides a fast, reliable, and effective method for pipeline vibration control based on particle damping technology. It is understandable that the method provided in the embodiments of the present application is applicable to any pipeline that is prone to vibration. It can be a pipeline that is prone to vibration due to low material rigidity, such as a copper pipe commonly used in refrigeration equipment, or it can be due to a longer structure. , The pipeline with large spatial span, large flexibility and easy to vibrate.

Fig. 1 shows a schematic flowchart of a vibration control method according to an embodiment of the present application.

As shown in Figure 1, the vibration control method includes:

S102: Perform modal analysis on the pipeline, and derive the modal vibration shape of the pipeline.

In this step, the modal analysis of the pipeline is performed first, the modal vibration shape of the pipeline can be obtained, and then the vibration of the pipeline can be understood.

S104: Determine the candidate damping position of the pipeline according to the modal shape, so as to provide a particle damper at the candidate damping position, and the amplitude of the candidate damping position exceeds the amplitude of the non-candidate damping position of the pipeline.

In this step, through further analysis of the derived modal shapes, the amplitude of the pipeline at different parts can be obtained, and the part with larger amplitude is selected as the candidate damping part, which can be used by designers and developers to choose to set particle dampers in the candidate damping part , So as to control the vibration and stress of the pipeline.

In the pipeline vibration control method provided by the embodiments of the present application, firstly, a simulation analysis is performed on the pipeline, and then a vibration and stress control scheme is quickly obtained according to the simulation analysis result. This method does not require relevant test analysis and actual production of corresponding pipeline objects before obtaining the vibration and stress control plan, which reduces related costs and reduces physical structure changes. In addition, this solution uses the damping effect of the particle damper to suppress pipeline vibration and reduce stress. Due to the stable physical properties of the material, high temperature and low temperature resistance, the particle damper is suitable for harsh working conditions where traditional dampers cannot work-it can be used normally at temperatures below the melting point of the particle material and the cavity wall material, so it can be suitable for special working conditions Under the pipeline, such as high temperature pipeline and low temperature pipeline in refrigeration equipment; particle dampers also have the advantages of small additional mass and simple structure. Therefore, compared with traditional dampers that require additional installation structures, they can be installed in the pipeline structure. External application has little impact on the pipeline, no need to change the original pipeline structure, reducing structural changes, shortening the product development cycle, and reducing development costs.

Fig. 2 shows a schematic flowchart of a vibration control method according to another embodiment of the present application.

As shown in Figure 2, the vibration control method includes:

S202: Establish a three-dimensional model of the pipeline, perform modal analysis on the three-dimensional model, and derive the modal vibration shape of the pipeline, which includes the corresponding natural frequency and natural vibration shape.

In this step, firstly, based on the three-dimensional modeling software, perform three-dimensional modeling of the object that needs vibration and stress control, or the newly designed object, and then use the structural simulation software to perform modal analysis on the established three-dimensional model, and then export the pipeline Mode shape. Here, the establishment of a new three-dimensional model is taken as an example. In addition, the established three-dimensional model can also be directly obtained.

S204: Acquire a control frequency band range.

In this step, the control frequency band range is the vibration frequency band range of the pipeline that is concerned in practical applications. The pipeline is affected by external excitation and will produce vibration. This solution does not introduce excitation data, but selects the frequency range of vibration and stress as the control frequency range according to actual needs, and directly studies when the pipeline vibrates within the control frequency range. Under the circumstances, the analysis process can be simplified while improving the pertinence.

S206: Determine the natural frequency within the control frequency band and record it as the control natural frequency, and record the control natural frequency and its corresponding natural vibration shape as the control vibration shape.

In this step, the modal vibration shape is a multi-order vibration shape. In other words, the modal vibration shape of the pipeline specifically includes the multi-order natural frequency of the pipeline and its corresponding natural vibration shape. From the multi-order natural frequencies of the mode shape, the natural frequency within the control frequency band is selected as the control natural frequency, and the control mode shape including the control natural frequency and its corresponding natural mode shape can be obtained.

S208: Determine the candidate damping position of the pipeline according to the control mode shape, so as to provide a particle damper at the candidate damping position, and the amplitude of the candidate damping position exceeds the amplitude of the non-candidate damping position of the pipeline.

In this step, each natural mode shape shows the amplitude of the pipeline at different parts at the corresponding natural frequency. The process of analyzing the modal mode shape to obtain candidate damping positions is to analyze each natural mode shape one by one. The process of the natural mode shape corresponding to the frequency. Therefore, the more natural frequencies involved, the more natural mode shapes are analyzed, and the more candidate damping positions are obtained. By analyzing only the natural vibration mode corresponding to the natural frequency within the control frequency band, the amount of analysis data is reduced, and the vibration and stress of the pipeline can be controlled in a targeted manner, which helps to optimize the control effect and reduce particles The number of damper settings.

In this embodiment, a method for obtaining pipeline vibration and stress control schemes through the process of "modeling-simulation-modal shape extraction-particle damper layout" is provided, and the particle damper layout is obtained, combined with particle damping The technology controls the vibration and stress of the pipeline structure. For example, after the first "Modeling - Simulation - mode shapes extracted" natural modes derived line at 10Hz, 15Hz, 20Hz, 25Hz four natural frequencies, they constitute the mode shapes A _i, And the control frequency range of interest is 12 Hz to 23 Hz, then the natural modes of 15 Hz and 20 Hz constitute the control mode B _i , that is, the control mode B _{i is} included in the mode mode A _i . At this time, control the frequency band range of vibration and stress according to actual needs, check the control mode B _{i in} this frequency band, and record the _{position C n with the} larger amplitude in the _{control mode B i} as a candidate damping position. A particle damper is applied at the position corresponding _{to C n} on the road structure.

It can be understood that the number of candidate damping parts may be one or multiple. When the number is one, the candidate damping position is the position of the pipeline with the largest amplitude determined according to the modal mode shape. At this time, the position with the largest amplitude in the modal mode shape of the pipeline is the position where the particle damper is applied; When the number is more than one, the candidate damping positions are the first few positions of the pipeline amplitude determined according to the mode shape. The candidate damping positions obtained at this time can provide designers and developers with a reference for setting particle dampers In the actual design, because different pipelines have different acceptable levels of amplitude, if the acceptable range is larger, then the position of the largest amplitude can be selected. If the acceptable range is smaller, then the larger amplitude Multiple particle dampers are installed. In other words, according to vibration control requirements, particle dampers can be installed in all candidate damping positions, or particle dampers can be installed only in some candidate damping positions. With regard to how to select candidate damping parts, the following will introduce three embodiments.

Example one

FIG. 3 shows a schematic flow chart of the vibration control method of Embodiment 1 of the present application.

As shown in Figure 3, the vibration control method includes:

S302: Establish a three-dimensional model of the pipeline, perform modal analysis on the three-dimensional model, and derive the modal vibration shape of the pipeline, which includes the corresponding natural frequency and natural vibration shape;

S304: Acquire a control frequency band range;

S306: Determine the natural frequency within the control frequency band, record it as the control natural frequency, and record the control natural frequency and its corresponding natural mode as the control mode;

S308: Obtain a set damping quantity as the quantity of candidate damping parts to be determined;

S310: Determine the candidate damping position of the pipeline according to the control mode shape, so as to set a particle damper at the candidate damping position, and the amplitude of the candidate damping position exceeds the amplitude of the non-candidate damping position of the pipeline;

S312: Output all the determined candidate damping parts in order of amplitude.

In this embodiment, by obtaining the set damping quantity and determining the number of candidate damping parts accordingly, the number of final candidate damping parts can be adjusted, which improves the flexibility of the solution. It can be understood that, because the amplitude of the candidate damping part exceeds the amplitude of the non-candidate damping part of the pipeline, the determined candidate damping part is the part with the highest amplitude on the pipeline. By outputting all candidate damping parts in order of amplitude, it can provide reference for designers and developers to set up particle dampers as needed.

It is conceivable that the step position of the above S308 in the whole method can be changed, either forward or backward. When moving backward, it can be combined with S310. In S310, the different parts of the pipeline are sorted according to the amplitude. Then obtain the set damping quantity, and select the corresponding number of parts at the front as the candidate damping parts accordingly.

Example two

Fig. 4 shows a schematic flow chart of the vibration control method of the second embodiment of the present application.

As shown in Figure 4, the vibration control method includes:

S402: Establish a three-dimensional model of the pipeline, perform modal analysis on the three-dimensional model, and derive the modal vibration shape of the pipeline, which includes the corresponding natural frequency and natural vibration shape;

S404: Acquire a control frequency band range;

S406: Determine the natural frequency within the control frequency band, record it as the control natural frequency, and record the control natural frequency and its corresponding natural mode as the control mode;

S408: Acquire a set damping quantity as the quantity of candidate damping parts to be determined;

S410: Determine candidate damping parts of the pipeline according to the control mode shape, so as to provide particle dampers at the candidate damping parts, and the amplitude of the candidate damping parts exceeds the amplitude of the non-candidate damping parts of the pipeline;

S412: Output all the determined candidate damping parts and their amplitudes.

The only difference between this embodiment and the second embodiment is that the amplitude of the candidate damping part is also output when outputting, which can provide more comprehensive reference data.

Example three

Fig. 5 shows a schematic flow chart of the vibration control method of the third embodiment of the present application.

As shown in Figure 5, the vibration control method includes:

S502: Establish a three-dimensional model of the pipeline, perform modal analysis on the three-dimensional model, and derive the modal vibration shape of the pipeline, which includes the corresponding natural frequency and natural vibration shape;

S504: Acquire a control frequency band range;

S506: Determine the natural frequency within the control frequency band, record it as the control natural frequency, and record the control natural frequency and its corresponding natural mode as the control mode;

S508: Acquire an amplitude threshold;

S510: Determine, according to the control mode shape, a part in the pipeline whose amplitude is greater than or equal to an amplitude threshold, and mark it as a candidate damping part for setting a particle damper at the candidate damping part;

S512: Output all the determined candidate damping positions.

In this embodiment, unlike the first and second embodiments, the number is not used as the criterion for determining candidate damping parts, but with the aid of the amplitude threshold, the parts whose amplitude exceeds the amplitude threshold are marked as candidate damping parts. Quantitative analysis of pipeline amplitude can be realized, which improves the flexibility and adaptability of the scheme. S512 is the output step of candidate damping parts. Here, the output of all candidate damping parts is taken as an example for description. Of course, you can also refer to the first embodiment for sorting according to the amplitude order, or refer to the second embodiment to output the amplitudes together.

It is conceivable that the amplitude threshold can be preset or manually input. Similar to S308 in the first embodiment, the step position of the above S508 in the entire method can also be changed, either forward or manually. It can be moved backward, and can be combined with S510 when moving backward. In S510, the amplitude of different parts of the pipeline is obtained first, and then the amplitude threshold is obtained, and the part whose amplitude is greater than or equal to the amplitude threshold is marked as a candidate damping part.

In some embodiments, further, the pipeline vibration control method further includes: receiving parameter information of the candidate particle dampers; according to the parameter information, performing modal analysis on the pipeline where the candidate particle dampers are set at the candidate damping positions, and deriving the optimization Mode shape.

In this embodiment, it is further defined that the pipeline vibration control method further includes a modal analysis combined with a particle damper. Through the modal analysis of the pipeline with candidate particle dampers, it is possible to simulate the control effect of the pipeline vibration and stress after the specified candidate particle dampers are set at the designated candidate damping position, and to screen and control accordingly The solution further reduces the related vibration and stress tests, and reduces related costs.

The parameter information may include the structural information and position information of the candidate particle damper. The structural information may include, for example, the shell size, shell material, filling material, and filling amount of the candidate particle damper, and the position information may be the candidate particle damper. Which candidate damping position is specifically set at. In practical applications, you can use the visual interface to display all candidate damping parts, and you can also retrieve and display various pre-stored particle dampers based on the operation of picking up a certain candidate damping part. It is conceivable that the input interface can also be configured to receive The input structure information of the candidate particle damper is then based on the operation of selecting a certain particle damper or the operation of inputting structure information, and the corresponding structure information and the position information corresponding to the picked candidate damping part are used as parameter information.

Among them, for the case of pre-stored multiple particle dampers, it is also possible to arrange and combine all or selected part of the pre-stored particle dampers and all or selected part of the candidate damping positions to obtain multiple alternative control schemes. Select control schemes to perform modal analysis one by one, and obtain the one with the best vibration and stress control effect, or obtain several schemes with better control effect, so as to improve the standardized process of determining the pipeline vibration control scheme and realize the automatic design. It is conceivable that when the aforementioned input interface is also configured, corresponding buttons can also be configured at the same time to select whether to save the input structure information of candidate particle dampers as pre-stored information, so as to expand the number of pre-stored particle dampers.

Next, in conjunction with Fig. 6 to Fig. 11, a specific embodiment is used to demonstrate the pipeline vibration control method provided by the embodiment of the present application.

First, as shown in Figure 6, a three-dimensional model of the pipeline is established and an evaluation point is selected. As shown in Figure 7, the structural simulation software is used to transform the three-dimensional model into a simulation analysis model, modal analysis is performed, and then the pipeline shown in Figure 8 to Figure 10 is derived at the third-order natural frequency in the control frequency band. Natural vibration mode, as the control mode, the intensity of the color in the figure indicates the magnitude of the amplitude. The darker the color, the larger the amplitude. The parts C ₁ , C ₂ , C _{3 with the} largest amplitude in each natural mode are used as candidate damping Part, set the particle damper. Figure 11 shows the comparison curve of acceleration response with or without particle dampers under this scheme. It can be seen that after the particle dampers are installed, the acceleration amplitude is greatly reduced, which effectively suppresses pipeline vibration and reduces stress.

As shown in FIG. 12, the embodiment of the second aspect of the present application provides a computer device 100, including: a memory 102 configured to store a computer program; a processor 104 configured to execute the stored computer program to implement any one of the foregoing The steps of the pipeline vibration control method described in the embodiment thus have all the beneficial technical effects of the above-mentioned pipeline vibration control method, and will not be repeated here.

Specifically, the memory 102 may include a large-capacity memory for data or instructions. For example and not limitation, the memory 102 may include a hard disk drive (Hard Disk Drive, HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (Universal Serial Bus, USB) drive, or two or more Multiple combinations of these. Where appropriate, the memory 102 may include removable or non-removable (or fixed) media. Where appropriate, the memory 102 may be inside or outside the integrated gateway disaster recovery device. In a particular embodiment, the memory 102 is a non-volatile solid-state memory. In a particular embodiment, the memory 102 includes read-only memory (ROM). Where appropriate, the ROM can be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of these.

The foregoing processor 104 may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

The embodiment of the third aspect of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the pipeline vibration control method as described in any of the above embodiments are implemented, Therefore, it has all the beneficial technical effects of the above-mentioned pipeline vibration control method, which will not be repeated here.

The computer-readable storage medium may include any medium that can store or transmit information. Examples of computer-readable storage media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

The embodiment of the fourth aspect of the present application provides a pipeline system, including a pipeline and a particle damper. The particle damper is arranged at a candidate damping position of the pipeline, and the candidate damping position is composed of the tube as described in any of the above embodiments. Road vibration control method is obtained.

In the piping system provided by the embodiments of the present application, particle dampers are provided at the candidate damping positions of the pipeline obtained by the above-mentioned pipeline vibration control method, which can effectively suppress pipeline vibration, reduce stress, and reduce pipeline fracture and leakage. Risks improve the reliability of the piping system and prolong the service life of the piping system. Due to the adoption of the above pipeline vibration control method, the pipeline system also has the beneficial effects of short product development cycle and low development cost. It is understandable that the part where the particle damper is provided must be a candidate damping part, but not every candidate damping part is necessarily provided with a particle damper.

The embodiment of the fifth aspect of the present application provides a refrigeration device, including the pipeline system as described in the foregoing embodiment, and thus has the beneficial technical effects of the pipeline system, which will not be repeated here. The refrigeration equipment may be, for example, an air-conditioning system, especially a central air-conditioning system.

In some embodiments, the refrigeration equipment further includes a compressor, and the compressor is in communication with the pipeline.

In this embodiment, it is further defined that the refrigeration equipment further includes a compressor for compressing gaseous refrigerant. The pipeline directly connected to the compressor is easily affected by the vibration of the compressor and vibrates. By analyzing the candidate damping of the pipeline The particle dampers are installed in the parts, which can significantly improve the vibration and stress, reduce the risk of pipeline fracture and leakage, and improve the structural reliability of the refrigeration equipment. Specifically, the pipeline in the pipeline system is a pipeline directly connected to the exhaust port of the compressor. Since the exhaust pressure of the compressor is relatively high, the pipeline belongs to a high-pressure pipeline, and there is a strong demand for vibration reduction. It is understandable that the pipelines in the pipeline system may also be pipelines with large pressure pulsation in the refrigeration equipment.

In summary, the technical solutions provided by the embodiments of the present application can conveniently apply particle damping technology to the pipeline vibration and stress control of refrigeration equipment (such as air conditioning systems), and its specific solution design does not require too many resources. Investment, for the specific implementation personnel does not require too deep knowledge of related technologies, and has a good vibration control effect, especially suitable for the high-pressure pipeline directly connected to the compressor and the pipeline with large pressure pulsation, causing its vibration and stress Significant improvement, reducing the risk of pipeline breakage and leakage, and improving the structural reliability of the air conditioning unit system.

In this application, the term "plurality" refers to two or more than two, unless specifically defined otherwise. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that specific features, structures, materials or characteristics described in conjunction with the embodiment or examples are included in this application In at least one embodiment or example. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The above are only preferred embodiments of the application, and are not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A pipeline vibration control method, characterized in that it comprises:

Perform modal analysis on the pipeline to derive the modal vibration shape of the pipeline;

The candidate damping position of the pipeline is determined according to the modal shape, so as to provide a particle damper at the candidate damping position, and the amplitude of the candidate damping position exceeds the amplitude of the non-candidate damping position of the pipeline.
The pipeline vibration control method according to claim 1, wherein the operation of determining candidate damping positions of the pipeline according to the modal shape comprises:

Obtain the control frequency band range;

Filtering out a control mode shape from the mode mode shape according to the control frequency band range;

The candidate damping position of the pipeline is determined according to the control mode shape.
The pipeline vibration control method according to claim 2, wherein the modal vibration shape includes a corresponding natural frequency and a natural vibration shape, and the modal vibration shape is selected according to the control frequency band range The steps to control the mode shape include:

It is determined that the natural frequency within the control frequency band is recorded as a control natural frequency, and the control natural frequency and its corresponding natural vibration shape are recorded as the control vibration shape.
The pipeline vibration control method according to any one of claims 1 to 3, wherein the pipeline vibration control method further comprises:

Obtain the set damping quantity as the quantity of the candidate damping parts to be determined.
The pipeline vibration control method according to claim 4, wherein the pipeline vibration control method further comprises:

Output all the candidate damping positions determined in order of amplitude; or

Output all the determined candidate damping parts and their amplitudes.
The pipeline vibration control method according to any one of claims 1 to 3, wherein the operation of determining candidate damping positions of the pipeline according to the modal shape comprises:

Obtain the amplitude threshold;

According to the modal shape, it is determined that a part of the pipeline whose amplitude is greater than or equal to the amplitude threshold is recorded as the candidate damping part.
The pipeline vibration control method according to any one of claims 1 to 3, wherein the operation of performing modal analysis on the pipeline includes:

Establish or acquire a three-dimensional model of the pipeline, and perform modal analysis on the three-dimensional model.
The pipeline vibration control method according to any one of claims 1 to 3, wherein the pipeline vibration control method further comprises:

Receive parameter information of candidate particle dampers;

According to the parameter information, a modal analysis is performed on the pipeline where the candidate particle damper is installed at the candidate damping position, and an optimized modal shape is derived.
A computer device, characterized in that it comprises:

Memory, configured to store computer programs;

The processor is configured to execute the stored computer program to implement the steps of the pipeline vibration control method according to any one of claims 1 to 8.
A computer-readable storage medium with a computer program stored thereon, wherein the computer program implements the steps of the pipeline vibration control method according to any one of claims 1 to 8 when the computer program is executed by a processor.
A piping system is characterized in that it comprises:

Pipeline; and

The particle damper is provided at a candidate damping position of the pipeline, and the candidate damping position is obtained by the pipeline vibration control method according to any one of claims 1 to 8.
A refrigeration equipment, characterized in that it comprises:

The piping system of claim 11.
The refrigeration equipment according to claim 12, wherein the refrigeration equipment further comprises:

A compressor, the compressor communicates with the pipeline