Method for controlling vibration of equipment in building

Abstract

The invention discloses a method for controlling vibration of equipment in a building. The method comprises the following steps: evaluating the type and quantity of power equipment in the building; determining a vibration evaluation standard according to the type and the number of the power equipment in the building, and determining whether the power equipment in the building is put into use or not; if the power equipment in the building is not put into use, a vibration isolation scheme is determined according to design data; if the power equipment in the building is put into use, carrying out a vibration test on an environment in which the power equipment in the building runs, if a test result does not meet a standard, testing a vibration source and vibration characteristics, and determining a vibration isolation transformation scheme according to the obtained vibration source and vibration characteristics; according to the design parameters of the vibration isolation scheme and the vibration isolation transformation scheme, a finite element model is established for dynamic response analysis, and a matched vibration isolation mode is selected; and according to the selected vibration isolation mode, a final vibration isolation construction scheme is determined. According to the method, design parameters can be optimized, the work amount can be reduced, and the actual vibration isolation effect is guaranteed.

Description

Technical Field

[0001] The invention relates to a vibration isolation technology for power equipment, in particular to a vibration control method for equipment in a building. Background Art

[0002] At present, vibration reduction measures are rarely used for cold and hot source equipment in many large office buildings. However, the vibration problem is not taken seriously enough in the design stage, the cooperation among various disciplines is not close enough, there is no strict vibration reduction design, and the vibration reduction measures are inappropriate. Nowadays, most design units do not have mature and reliable technical measures and standard practices when conducting vibration control design. The vibration and noise generated by the operation of the equipment will first cause noise interference to the surrounding and lower indoor areas through solid sound transmission, and may also cause adverse reactions to human physiological functions (such as increasing heart rate). At the same time, it may also cause resonance of the building structure, thereby shortening the service life of the building. Since vibration control design is not included in the mandatory design requirements for the structural design of large buildings such as hospitals and offices, traditional structural designers lack sufficient design experience for efficient and reasonable vibration control. Therefore, some design units will adopt a general approach. However, large buildings generally face the problem of many types and high complexity of power equipment and vibration sources. After the implementation of measures, the problem of vibration exceeding the standard may still occur. Often, after the vibration exceeds the standard in the operation stage, the equipment will be reconstructed for vibration reduction. Not only is the construction difficult and costly, it affects the normal operation of the equipment, and the vibration reduction effect is difficult to guarantee, which will also affect the quality of the building and normal delivery and use. In actual projects, even after taking vibration isolation measures, many equipment, especially those located on the roof, still have obvious vibration and excessive noise in the adjacent rooms. The reason for this is that apart from the selection of vibration isolation devices, the substandard assembly accuracy of equipment, and the failure to strictly follow the regulations during construction and installation, another important reason is that the design unit has no experience and relies on the manufacturer to select measures, resulting in defects in the vibration isolation method itself.

[0003] Therefore, the art is in urgent need of a mature vibration control method for equipment in buildings to solve the above-mentioned engineering problems and to optimize the problems existing in existing project applications. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vibration control method for equipment in a building in view of the above-mentioned defects of the prior art.

[0005] In order to achieve the above object, the present invention provides a method for controlling vibration of equipment in a building, which comprises the following steps:

[0006] S100, assess the types and quantity of power equipment in the building;

[0007] S200, determining a vibration assessment standard according to the type and quantity of the power equipment in the building, and determining whether the power equipment in the building is put into use;

[0008] S300, if the power equipment in the building is not put into use, determine a vibration isolation plan based on design data;

[0009] S400, if the power equipment in the building is put into use, then a vibration test is performed on the environment in which the power equipment in the building is running; if the test result does not meet the standard, then a vibration source and vibration characteristics are tested, and a vibration isolation reconstruction plan is determined based on the obtained vibration source and vibration characteristics;

[0010] S500, establishing a finite element model to perform dynamic response analysis according to the design parameters of the vibration isolation scheme and the vibration isolation modification scheme, and selecting a matching vibration isolation method; and

[0011] S600: Determine a final vibration isolation construction plan according to the selected vibration isolation method.

[0012] The above-mentioned method for controlling vibration of equipment in a building further comprises:

[0013] S700. Perform on-site implementation and vibration testing according to the final vibration isolation construction plan.

[0014] In the above-mentioned method for controlling vibration of equipment in a building, the vibration evaluation standard complies with the vibration tolerance standard and the vibration tolerance value of precision instruments and equipment in the building.

[0015] In the above-mentioned in-building equipment vibration control method, the in-building power equipment includes power equipment used under unconventional conditions.

[0016] In the above-mentioned method for controlling vibration of equipment in a building, the power equipment used under the unconventional state includes a backup generator and a backup water pump.

[0017] In the above-mentioned method for controlling vibration of equipment in a building, the finite element model is a calculation model used based on the main structure design.

[0018] In the above-mentioned method for controlling vibration of equipment in a building, the natural frequency of the finite element model is consistent with the actual measured natural frequency of the building.

[0019] In the above-mentioned method for controlling vibration of equipment in a building, in step S700, after the final vibration isolation construction plan for each power equipment is implemented, a vibration test is performed on the power equipment to ensure that the vibration isolation effect of the single power equipment meets the requirements.

[0020] In the above-mentioned method for controlling vibration of equipment in a building, the final vibration isolation construction plan must ensure that the normal use of the equipment already put into use is not affected during the renovation process.

[0021] In the above-mentioned method for controlling vibration of equipment in a building, in step S500, the vibration isolation method includes vibration isolation supports and pipeline vibration reduction, vibration reduction foundation and / or tuned mass damper.

[0022] The technical effects of the present invention are:

[0023] The present invention is applied to the vibration isolation design and reconstruction of power equipment in buildings. By combining the measured vibration on site with finite element simulation, the vibration isolation effect after the project is implemented is guaranteed. It has the following characteristics:

[0024] (1) Strong modularity. The vibration isolation structures used are all standardized factory parts, which can be adjusted in real time according to the on-site conditions, eliminating the steps of on-site cutting and welding;

[0025] (2) Low rework rate. The combination of sampling on-site and vibration testing ensures that the vibration isolation effect of each power unit that undergoes vibration isolation can be tested.

[0026] (3) Low project cost. By combining finite element simulation with field measurements, effective numerical simulation of the vibration isolation effect of each floor in the building can be performed before the project is implemented, thus avoiding repeated and useless structural measures and reducing costs.

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of an embodiment of the present invention;

[0029] Figure 2 FIG. 1 is a flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0031] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of an embodiment of the present invention, Figure 2 The flowchart of one embodiment of the present invention. The vibration control method of equipment in a building of the present invention is used to solve the problem that the vibration reduction design is unclear and relies on general practices in the vibration isolation design of traditional equipment, resulting in excessive vibration in the building, and comprehensively considers the actual situation on site, and should ensure that the normal use of the equipment already put into use is not affected as much as possible during the transformation process, including the following steps:

[0032] Step S100: Evaluate the types and quantities of power equipment in the building, and make a preliminary estimate of the product types and engineering quantities required for the vibration isolation solution; the power equipment in the building includes power equipment used in unconventional conditions, and the power equipment used in unconventional conditions includes backup generators and backup water pumps, etc.;

[0033] Step S200, determining the vibration assessment standard according to the type and quantity of the power equipment in the building, and determining whether the power equipment in the building is put into use; wherein the vibration assessment standard should comply with the vibration allowable standard and the vibration allowable value of the precision instruments and equipment in the building, such as the relevant national vibration standards and the vibration allowable standard provided by the precision instruments and equipment manufacturers in the building, to establish the actual effect achieved after the project is implemented;

[0034] Step S300: if the power equipment in the building is not put into use, determine a vibration isolation scheme according to the design data;

[0035] Step S400: If the power equipment in the building is put into use, a vibration test is performed on the environment in which the power equipment in the building is running. If the test result does not meet the standard, the vibration source and vibration characteristics are tested, and a vibration isolation reconstruction plan is determined based on the obtained vibration source and vibration characteristics;

[0036] Step S500: according to the design parameters of the vibration isolation scheme and the vibration isolation reconstruction scheme, a finite element model is established to perform dynamic response analysis, and a matching vibration isolation method is selected, wherein the vibration isolation method includes vibration isolation support and pipeline vibration reduction, vibration reduction foundation and / or tuned mass damper; the finite element model is a calculation model used based on the main structure design, and the natural frequency of the finite element model is consistent with the measured natural frequency of the building;

[0037] Step S600: Determine a final vibration isolation construction plan according to the selected vibration isolation method, wherein the final vibration isolation construction plan must ensure that the normal use of the equipment already put into use is not affected during the transformation process; and

[0038] Step S700, perform on-site implementation and vibration testing according to the final vibration isolation construction plan, wherein after the final vibration isolation construction plan for each power equipment is implemented, perform a vibration test on the power equipment to ensure that the vibration isolation effect of the single power equipment meets the requirements.

[0039] During the on-site implementation and vibration test, the vibration isolation effect of the equipment is determined by real-time monitoring of the test results. Before finalizing the construction plan, the dynamic characteristics and operating conditions of the equipment should be reconfirmed with the equipment manufacturer and the equipment user.

[0040] In this embodiment, the types and weights of power equipment in the building are first evaluated, and a preliminary estimate of the product types and engineering quantities required for the vibration isolation scheme is made. The vibration assessment standard is determined, and the actual effect achieved after the project is implemented is established based on the current national relevant standards and the allowable vibration values ​​of precision equipment in the building. Determine whether the power equipment is put into use. According to whether the power equipment has been put into formal operation, the vibration isolation scheme is divided into a vibration isolation renovation construction scheme and a vibration isolation design and construction scheme according to the path. If the power equipment has been put into use, an environmental vibration test is performed on the power equipment during operation. If the test results do not exceed the standard, the power equipment can be put into use normally; if the test results exceed the standard, it is necessary to determine the vibration source and vibration characteristics. According to the vibration source and vibration characteristics determined in the environmental vibration test results, the vibration isolation renovation plan is determined to obtain the required design input parameters. If the power equipment has not been put into use, the vibration isolation plan is determined based on the design data to obtain the required input design parameters.

[0041] In this embodiment, the finite element model is used for dynamic response analysis, which is generally based on the calculation model used for construction design in the structural profession, and for the power equipment used in the building, a targeted design analysis and verification is performed based on the design parameters determined by the vibration isolation design or renovation plan. According to the results of the dynamic response analysis of the finite element model, a matching vibration isolation method is selected in combination with the actual situation on site, and the final vibration isolation construction plan is determined, which includes the model and quantity of the vibration isolation structure used.

[0042] On-site implementation and vibration testing require that each unit or pipeline with a vibration isolation structure installed undergoes real-time vibration testing after installation to ensure the vibration isolation effect. After the implementation is completed, the power equipment is started and operated normally, and the rooms inside the building are measured to ensure that the implementation effect meets the vibration assessment standards. Only after the project implementation is completed and meets the standards can the power equipment be put into normal use.

[0043] Among them, the environmental vibration test can use vibration acceleration sensors, collectors and computers equipped with professional software. The acceleration sensors are used to sample the vibration acceleration of the power equipment when it is running in the field environment. This acceleration value will be used as the vibration source excitation data to evaluate whether the site in the building meets the specification limit, and then determine whether the power equipment inside the building can be directly put into use. The equipment used for real-time monitoring of the test situation is the same as that used in the environmental vibration test. During the environmental vibration test, it is necessary to monitor various data, including vibration acceleration, acceleration spectrum, and acceleration vibration level, to ensure the accuracy of the final collected data. The power characteristics and operating conditions of the equipment need to determine the actual operating power, operating conditions and number of units in operation of the power equipment unit (usually the standby unit is not turned on). It is necessary to design an environmental vibration test plan based on the actual use of the unit, and determine the excitation input position and operating conditions in the finite element model based on the actual installation position of the power equipment unit. The vibration isolation structure can choose oil dampers, steel spring vibration isolators, power equipment vibration reduction racks, hanging spring vibration isolators, flexible sleeves and tuned mass dampers (TMDs).

[0044] The present invention optimizes the existing technology that relies on the manufacturer to select general measures into a special design for the project, avoiding the disconnection between design and implementation caused by the use of general measures, which in turn affects the overall vibration isolation effect of the equipment and causes the vibration in the building to exceed the standard. In addition to the vibration isolation design based on the design data, a finite element model is established for the project building, a dynamic response analysis is performed, and the design plan is verified, which can optimize the design parameters and reduce the amount of engineering work. During the on-site implementation stage, by coordinating with real-time vibration testing, the actual effect of the vibration isolation measures is guaranteed and secondary rework is avoided.

[0045] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for controlling vibration of equipment in a building, characterized in that: The steps include: S100, assess the types and quantity of power equipment in the building; S200, determining a vibration assessment standard according to the type and quantity of the power equipment in the building, and determining whether the power equipment in the building is put into use; S300, if the power equipment in the building is not put into use, determine a vibration isolation plan based on design data; S400, if the power equipment in the building is put into use, then a vibration test is performed on the environment in which the power equipment in the building is running; if the test result does not meet the standard, then a vibration source and vibration characteristics are tested, and a vibration isolation reconstruction plan is determined based on the obtained vibration source and vibration characteristics; S500, establishing a finite element model to perform dynamic response analysis according to the design parameters of the vibration isolation scheme and the vibration isolation reconstruction scheme, and selecting a matching vibration isolation method; as well as S600: Determine a final vibration isolation construction plan according to the selected vibration isolation method.

2. The vibration control method for equipment in a building according to claim 1, characterized in that: Also includes: S700. Perform on-site implementation and vibration testing according to the final vibration isolation construction plan.

3. The vibration control method for equipment in a building according to claim 1, characterized in that: The vibration assessment standard complies with the vibration tolerance standard and the vibration tolerance value of precision instruments and equipment in the building.

4. The vibration control method for equipment in a building according to claim 1, characterized in that: The power equipment within the building includes power equipment used under abnormal conditions.

5. The vibration control method for equipment in a building according to claim 4, characterized in that: The power equipment used in the abnormal state includes a backup generator and a backup water pump.

6. The method for controlling vibration of equipment in a building according to claim 1, characterized in that: The finite element model is a calculation model used based on the main structure design.

7. The vibration control method for equipment in a building according to claim 6, characterized in that: The natural frequency of the finite element model is consistent with the measured natural frequency of the building.

8. The vibration control method for equipment in a building according to claim 1, characterized in that: In step S700, after the final vibration isolation construction plan for each power equipment is implemented, a vibration test is performed on the power equipment to ensure that the vibration isolation effect of the single power equipment meets the requirements.

9. The vibration control method for equipment in a building according to claim 1, characterized in that: The final vibration isolation construction plan must ensure that the normal use of the equipment already put into use is not affected during the renovation process.

10. The vibration control method for equipment in a building according to claim 1, characterized in that: In step S500, the vibration isolation method includes vibration isolation supports and pipeline vibration reduction, vibration reduction foundation and / or tuned mass damper.

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