CN116882237A - Design method of VC-C micro-vibration prevention structure of high-tech factory building - Google Patents
Design method of VC-C micro-vibration prevention structure of high-tech factory building Download PDFInfo
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Abstract
The invention belongs to the technical field of micro-vibration prevention structures, and particularly relates to a design method of a VC-C micro-vibration prevention structure of a high-tech factory building, which comprises the following steps: structural vibration response analysis; analyzing the modal change; 1/3 octave analysis of structural vibration response; and analyzing the data to reach a conclusion. According to the invention, the design of the micro-vibration prevention structure is carried out through modeling analysis, so that the defect of conventional design by referring to similar project experience is overcome, the uncertainty of a conventional design method is solved, and whether a factory building can meet the micro-vibration prevention grade requirement of VC-C or not can be accurately analyzed; meanwhile, the design of the micro-vibration prevention structure is carried out through modeling analysis, so that the defect of conventional design by referring to similar project experience is overcome, the uncertainty of a conventional design method is solved, and whether a factory building can meet the micro-vibration prevention grade requirement of VC-C or not can be accurately analyzed; the thickness of the plate can be reduced to the maximum extent on the premise of meeting the VC-C micro vibration prevention requirement, the engineering cost is reduced, and the method has good economic benefit.
Description
Technical Field
The invention belongs to the technical field of micro-vibration prevention structures, and particularly relates to a design method of a VC-C micro-vibration prevention structure of a high-tech factory building.
Background
With the continuous development of high and new technology industry, higher requirements are also put on the construction of factory building structures, because related instruments, equipment and the like need to work and operate better in an environment similar to vibration-free environment, and small vibration can have adverse effects on the performance, service life and the like of precision equipment. Therefore, the requirement for micro-vibration prevention of high-tech factory building structures is higher and higher.
The VC-C curve is the allowable vibration value of precision equipment and instruments used in the electronic industry, the nano laboratory, the physicochemical laboratory and the like, and whether a factory building meets the micro-vibration prevention level requirement can be well analyzed through analysis of the VC-C curve.
However, in the actual construction process, the related micro-vibration prevention design is generally carried out according to the experience of similar projects, the design is generally conservative and has uncertainty, and whether the factory building can meet the micro-vibration prevention grade requirement of VC-C cannot be quantitatively and accurately analyzed.
Disclosure of Invention
The invention aims to solve the problems in the background art, and provides a design method of a VC-C micro-vibration prevention structure of a high-tech factory building, which can solve the uncertainty of a conventional design method and accurately analyze whether the factory building can meet the micro-vibration prevention grade requirement of VC-C.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a design method of a high-tech factory building VC-C micro-vibration prevention structure, the method comprising:
structural vibration response analysis;
analyzing the modal change;
1/3 octave analysis of structural vibration response;
and analyzing the data to reach a conclusion.
As an alternative implementation manner, in the step of analyzing the structural vibration response in the embodiment of the present invention, the method specifically includes the following steps:
input data selection: selecting the period data without external interference of the first measuring point and the second measuring point as input to perform structural vibration;
vibration response analysis: inputting the data of the first measuring point and the second measuring point into a finite element model for power time-course analysis, and carrying out 1/3 octave analysis on the vibration input data and the extracted maximum value point of the vibration response of each layer of the structure and comparing the vibration input data and the extracted maximum value point with a standard limit value.
As an alternative implementation manner, in the step of vibration response analysis in the embodiment of the present invention, the method specifically includes the following steps:
1/3 octave analysis of the input measuring point;
1/3 octave analysis of structural vibration response;
data summary was analyzed.
As an alternative implementation manner, in the step of analyzing the 1/3 octave of the structural vibration response in the embodiment of the present invention, the method specifically includes the following steps:
inputting structural vibration response by a first measuring point;
and inputting structural vibration response by the second measuring point.
As an alternative implementation manner, in the step of analyzing the modal variation in the embodiment of the present invention, the method includes:
sequentially reducing the thickness of the first layer plate of the structure from 500mm to 400mm and 300mm;
and analyzing and counting the modal frequencies of the first sixth order of the structure.
As an alternative implementation manner, in the step of analyzing the 1/3 octave of the structural vibration response in the embodiment of the present invention, the method specifically includes the following steps:
carrying out dynamic time-course analysis on the numerical models of the one-layer plates with different thicknesses;
extracting larger value points of vibration response of each layer of the structure;
1/3 octave analysis was performed.
As an alternative implementation manner, in the step of analyzing data and drawing conclusions, the method specifically includes the following steps:
analyzing whether the vibration response of the first layer structure exceeds VC-C when the thickness of the first layer plate of the structure is 500mm, 400mm and 300mm;
screening plate thicknesses exceeding the VC-C and not exceeding the requirement, and comparing the plate thicknesses meeting the VC-C vibration requirement;
and selecting the plate thickness with the minimum thickness, namely the micro-vibration preventing structure with the lowest construction cost.
Compared with the prior art, the design method of the VC-C micro-vibration prevention structure of the high-tech factory building has the advantages that:
according to the embodiment of the invention, the design of the micro-vibration prevention structure is carried out through modeling analysis, the defect that the design is carried out by referring to similar project experience conventionally is overcome, the uncertainty of a conventional design method is solved, and whether a factory building can meet the micro-vibration prevention grade requirement of VC-C can be accurately analyzed.
According to the embodiment of the invention, dynamic time-course analysis is carried out on numerical models of first-layer plates with different thicknesses, larger value points of vibration response of each layer of the structure are extracted, and 1/3 octave analysis is carried out, so that the minimum plate thickness requirement meeting the VC-C vibration requirement is obtained.
The design method of the invention can furthest reduce the plate thickness and the engineering cost on the premise of meeting the VC-C micro vibration prevention requirement, and has good economic benefit.
Drawings
FIG. 1 is a flow chart of a design method of a VC-C micro vibration preventing structure of a high-tech factory building;
FIG. 2 is a plot of measurement point number one VC;
FIG. 3 is a plot of measurement point VC;
FIG. 4 is a graph of a layer of maximum response nodes VC for a first-measurement-point structure;
FIG. 5 is a graph of a two-layer maximum response node VC for a first-measurement-point structure;
FIG. 6 is a graph of a three-layer maximum response node VC for a first measurement point structure;
FIG. 7 is a graph of a four-layer maximum response node VC for a first-measurement-point structure;
FIG. 8 is a graph of a layer of maximum response nodes VC for a second measurement point structure;
FIG. 9 is a graph of a two-layer maximum response node VC for a second-measurement-point structure;
FIG. 10 is a plot of a three-layer maximum response node VC for a station number two configuration;
FIG. 11 is a graph of a four-layer maximum response node VC for a second measurement point structure;
FIG. 12 is a graph of a front sixth order mode contrast for a laminate of varying thickness;
FIG. 13 is a graph of a layer of maximum response nodes VC for a first measurement point structure;
FIG. 14 is a graph of a two-layer maximum response node VC for a first-measurement-point structure;
FIG. 15 is a graph of a three-layer maximum response node VC for a first measurement point structure;
FIG. 16 is a graph of a four-layer maximum response node VC for a first-level measurement point structure;
FIG. 17 is a graph of a layer of maximum response nodes VC for a second measurement point structure;
FIG. 18 is a graph of a two-layer maximum response node VC for a station number two structure;
FIG. 19 is a plot of a three-layer maximum response node VC for a station number two configuration;
FIG. 20 is a graph of a four-layer maximum response node VC for a two-station structure.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
The following detailed description is made with reference to the accompanying drawings.
Referring to fig. 1, a design method of a VC-C micro-vibration prevention structure of a high-tech factory building includes:
s1: structural vibration response analysis;
further, referring to fig. 1, in the step S1, the method specifically includes the following steps:
s11: input data selection: selecting the period data without external interference of the first measuring point and the second measuring point as input to perform structural vibration;
s12: vibration response analysis: inputting the data of the first measuring point and the second measuring point into a finite element model for power time-course analysis, and carrying out 1/3 octave analysis on the vibration input data and the extracted maximum value point of the vibration response of each layer of the structure and comparing the vibration input data and the extracted maximum value point with a standard limit value.
Further, referring to fig. 1, in the step S12, the method specifically includes the following steps:
s121: 1/3 octave analysis of the input measuring point;
referring to fig. 2-3, fig. 2 is a first measurement point VC graph, and fig. 3 is a second measurement point VC graph.
S122: 1/3 octave analysis of structural vibration response;
further, referring to fig. 4-11, in the step S122, the method specifically includes the following steps:
inputting structural vibration response by a first measuring point;
and inputting structural vibration response by the second measuring point.
Wherein, fig. 4-7 are the first measuring point input structure vibration responses:
fig. 4 is a first-layer maximum response node VC graph of the structure, fig. 5 is a second-layer maximum response node VC graph of the structure, fig. 6 is a third-layer maximum response node VC graph of the structure, and fig. 7 is a fourth-layer maximum response node VC graph of the structure;
wherein, fig. 8-11 are the input structural vibration response of the station No. two:
fig. 8 is a first-layer maximum response node VC graph of the structure, fig. 9 is a second-layer maximum response node VC graph of the structure, fig. 10 is a third-layer maximum response node VC graph of the structure, and fig. 11 is a fourth-layer maximum response node VC graph of the structure.
S123: analysis data summary:
(1) As can be seen from fig. 2 and 3, the field vibration of the present project is at VC-E level;
(2) As can be seen from 4-FIG. 11, when the first measuring point and the second measuring point are used as vibration input, except that the first layer vibration response of the structure slightly exceeds VC-C, the nodes of other layers meet the VC-C vibration limit value.
S2: analyzing the modal change;
further, referring to table 1 and fig. 12, in the above step S2, the method specifically includes the following steps:
s21: sequentially reducing the thickness of the first layer plate of the structure from 500mm to 400mm and 300mm;
s22: and analyzing and counting the modal frequencies of the first sixth order of the structure.
Wherein, table 1 is a front sixth-order mode of one layer of plate with different thickness, and fig. 12 is a comparison chart of the front sixth-order mode of one layer of plate with different thickness;
from the analysis of table 1 and fig. 12, it can be seen that as the first layer plate thickness of the structure is reduced from 500mm to 400mm and 300mm, the first sixth order modal frequency of the structure decreases as the plate thickness becomes smaller.
| Order of | 300mm | 400mm | 500mm |
| 1 | 0.75 | 0.76 | 0.83 |
| 2 | 0.79 | 0.80 | 0.89 |
| 3 | 0.81 | 0.83 | 0.93 |
| 4 | 2.10 | 2.12 | 2.29 |
| 5 | 2.28 | 2.31 | 2.53 |
| 6 | 2.39 | 2.43 | 2.68 |
| 7 | 3.68 | 3.71 | 4.26 |
| 8 | 3.80 | 3.85 | 4.35 |
| 9 | 3.91 | 3.97 | 4.50 |
| 10 | 4.17 | 5.29 | 5.54 |
TABLE 1
S3: 1/3 octave analysis of structural vibration response;
further, referring to fig. 13-20, in the step S13, the method specifically includes the following steps:
s31: carrying out dynamic time-course analysis on the numerical models of the one-layer plates with different thicknesses;
s32: extracting larger value points of vibration response of each layer of the structure;
wherein, fig. 13-16 are the first measuring point input structure vibration responses:
fig. 13 is a first-layer maximum response node VC graph of the structure, fig. 14 is a second-layer maximum response node VC graph of the structure, fig. 15 is a third-layer maximum response node VC graph of the structure, and fig. 16 is a fourth-layer maximum response node VC graph of the structure;
wherein, fig. 17-20 are the input structural vibration response of the measurement point No. two:
fig. 17 is a first-layer maximum response node VC graph of the structure, fig. 18 is a second-layer maximum response node VC graph of the structure, fig. 19 is a third-layer maximum response node VC graph of the structure, and fig. 20 is a fourth-layer maximum response node VC graph of the structure.
S33: 1/3 octave analysis was performed:
(1) The mode frequency of the first ten orders of the model is reduced along with the reduction of the thickness of the first layer plate of the structure.
(2) The vibration response of the first layer is larger than that of the first layer when the first layer of the structure is 500mm and larger than that of the first layer when the second measuring point is input, the vibration response of the structure corresponding to other working conditions is 400mm and larger than that of the first layer when the second measuring point is input, and the vibration response of the fourth layer (roof) of the structure exceeds VC-C when the first layer is 400mm and 300 mm.
300mm one layer does not meet VC-C.
S4: analyzing the data to obtain a conclusion:
according to the analysis, when the plate thickness is 300mm, the vibration response of the first layer structure exceeds VC-C, and the requirements are not met; when the plate thickness is 400mm, all the four layers (namely the roof) are satisfied; when the plate thickness is 500mm, the VC-C requirement of the project is met. Because the factory building of this project is three-layer structure, the roofing structure does not have production technology requirement, does not have the requirement of preventing micro-vibration promptly, consequently the board thickness 400mm can satisfy the VC-C requirement of preventing micro-vibration of this project, and construction cost is the most economical.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A design method of a VC-C micro-vibration prevention structure of a high-tech factory building is characterized by comprising the following steps:
structural vibration response analysis;
analyzing the modal change;
1/3 octave analysis of structural vibration response;
and analyzing the data to reach a conclusion.
2. The method for designing a VC-C vibration damping construction for a high-tech plant according to claim 1, wherein in the step of analyzing the structural vibration response, the method specifically comprises the steps of:
input data selection: selecting the period data without external interference of the first measuring point and the second measuring point as input to perform structural vibration;
vibration response analysis: inputting the data of the first measuring point and the second measuring point into a finite element model for power time-course analysis, and carrying out 1/3 octave analysis on the vibration input data and the extracted maximum value point of the vibration response of each layer of the structure and comparing the vibration input data and the extracted maximum value point with a standard limit value.
3. The method for designing a high-tech factory building VC-C micro-vibration prevention structure according to claim 2, wherein in the step of vibration response analysis, the method specifically comprises the steps of:
1/3 octave analysis of the input measuring point;
1/3 octave analysis of structural vibration response;
data summary was analyzed.
4. The method for designing a VC-C vibration isolation structure for a high tech plant according to claim 3, wherein in the step of 1/3 octave analysis of the structural vibration response, the method specifically comprises the steps of:
inputting structural vibration response by a first measuring point;
and inputting structural vibration response by the second measuring point.
5. The method for designing a high-tech factory building VC-C micro-vibration prevention structure according to claim 1, wherein in the step of modal variation analysis, the method specifically comprises the steps of:
sequentially reducing the thickness of the first layer plate of the structure from 500mm to 400mm and 300mm;
and analyzing and counting the modal frequencies of the first sixth order of the structure.
6. The method for designing a VC-C micro-vibration prevention structure for a high-tech plant according to claim 1, wherein in the step of 1/3 octave analysis of the structural vibration response, the method specifically comprises the steps of:
carrying out dynamic time-course analysis on the numerical models of the one-layer plates with different thicknesses;
extracting larger value points of vibration response of each layer of the structure;
1/3 octave analysis was performed.
7. The method for designing a high-tech factory building VC-C micro-vibration prevention structure according to claim 1, wherein in the step of analyzing data and drawing conclusions, the method specifically comprises the steps of:
analyzing whether the vibration response of the first layer structure exceeds VC-C when the thickness of the first layer plate of the structure is 500mm, 400mm and 300mm;
screening plate thicknesses exceeding the VC-C and not exceeding the requirement, and comparing the plate thicknesses meeting the VC-C vibration requirement;
and selecting the plate thickness with the minimum thickness, namely the micro-vibration preventing structure with the lowest construction cost.
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Citations (3)
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|---|---|---|---|---|
| US20180106696A1 (en) * | 2015-03-23 | 2018-04-19 | Ghyslaine MCCLURE | Seismic response assessment of man-made structures |
| CN110501130A (en) * | 2019-09-21 | 2019-11-26 | 中冶建筑研究总院有限公司 | A kind of diagnosis of dynamic calculation and abnormal vibrations for superstructure and administering method |
| CN113684859A (en) * | 2021-08-13 | 2021-11-23 | 中国建筑第二工程局有限公司 | Construction method for foundation construction of anti-micro-vibration structure close to existing subway in photoelectric experimental park |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180106696A1 (en) * | 2015-03-23 | 2018-04-19 | Ghyslaine MCCLURE | Seismic response assessment of man-made structures |
| CN110501130A (en) * | 2019-09-21 | 2019-11-26 | 中冶建筑研究总院有限公司 | A kind of diagnosis of dynamic calculation and abnormal vibrations for superstructure and administering method |
| CN113684859A (en) * | 2021-08-13 | 2021-11-23 | 中国建筑第二工程局有限公司 | Construction method for foundation construction of anti-micro-vibration structure close to existing subway in photoelectric experimental park |
Non-Patent Citations (2)
| Title |
|---|
| SYSCOM INSTRUMENTS SA: ""Laboratory evaluation using vibration criterion- VC curves"", 《WWW.SYSCOM.CH》, 29 February 2020 (2020-02-29), pages 1 - 4 * |
| 胡晓勇等: ""高科技厂房结构微振响应分析"", 《地震工程与工程振动》, vol. 26, no. 4, 31 August 2006 (2006-08-31), pages 56 - 62 * |
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