CN110160724A - A kind of building aseismicity suspension and support performance state monitoring method - Google Patents
A kind of building aseismicity suspension and support performance state monitoring method Download PDFInfo
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- CN110160724A CN110160724A CN201910500061.7A CN201910500061A CN110160724A CN 110160724 A CN110160724 A CN 110160724A CN 201910500061 A CN201910500061 A CN 201910500061A CN 110160724 A CN110160724 A CN 110160724A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of building aseismicity suspension and support performance state monitoring methods, including installing sensor on the antidetonation diagonal brace of antidetonation suspension and support；Vibrational excitation is applied to antidetonation diagonal brace, while sensor carries out data acquisition；The data of analyte sensors acquisition and the characteristic frequency for calculating antidetonation suspension and support of the bolts at two ends under a variety of torque conditions, are fitted the characteristic frequency of antidetonation suspension and support and the relationship surface chart of bolts at two ends torque；Vibrational excitation is applied to the antidetonation suspension and support under the unknown torque condition of bolt, the data of analyte sensors acquisition simultaneously calculate the characteristic frequency of antidetonation suspension and support, according to the relationship curved surface map analysis being fitted in advance bolts at two ends torque at this time, judge bolt looseness state；The present invention can judge antidetonation suspension and support bolt looseness state by the vibratory response of the antidetonation suspension and support of monitoring, realize the monitoring of antidetonation suspension and support performance state, can effectively reduce, prevent and avoid as far as possible the generation of secondary disaster.
Description
Technical field
The invention belongs to structural health monitoring technology field, in particular to a kind of building aseismicity suspension and support performance state monitoring
Method.
Background technique
A possibility that building support fault pre-alarming and status monitoring are obtained according to component moving law or observation omen, is being propped up
Before hanger really breaks down, the unusual condition of suspension and support is forecast in time, is taken appropriate measures, to drop to the greatest extent
Loss caused by suspension and support failure during low land shake.
In addition, domestic and international few people are in the performance early warning problem for paying close attention to antidetonation suspension and support at present.It is sent out however as the epoch
Exhibition, social progress, people no longer content just to the comfort level lived, but pursue the security reliability lived.With structure
The scale and complexity of part device and engineering control system increasingly increase, to guarantee that structure safety whole under geological process can
By property, and then achieve the purpose that reduce and avoid secondary disaster as far as possible, is timely and effectively supervised by reliable condition monitoring technology
Survey and diagnosis building aseismicity suspension and support in use whether appearance loosens just seems especially urgent and important.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of building aseismicity branch in view of the above shortcomings of the prior art to hang
Frame performance state monitoring method, this building aseismicity suspension and support performance state monitoring method can pass through periodic monitoring antidetonation suspension and support
Vibratory response to judging whether the bolt of antidetonation suspension and support loose phenomenon occurs, can effectively reduce, prevent and as far as possible
Avoid the purpose of secondary disaster.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
A kind of building aseismicity suspension and support performance state monitoring method, comprising the following steps:
(1) sensor, one end of the antidetonation diagonal brace of the antidetonation suspension and support are installed on the antidetonation diagonal brace of antidetonation suspension and support
It is connect by bolt with floorboard, the other end is connect by bolt with other components in antidetonation suspension and support, and the sensor is used
In the vibratory response for monitoring antidetonation suspension and support of the bolt at both ends under a variety of torque conditions；
(2) apply the dynamic excitation of vibration to the antidetonation diagonal brace of antidetonation suspension and support, while sensor carries out data acquisition；
(3) data of sensor acquisition are analyzed and processed, and then calculate the characteristic frequency of antidetonation suspension and support；
(4) antidetonation suspension and support of the bolts at two ends under a variety of torque conditions is calculated according to the method for step (2) and (3)
Characteristic frequency analyzes the corresponding relationship of the respective torque value of bolts at two ends and the characteristic frequency value of antidetonation suspension and support and right according to this
It should be related to the relationship surface chart of fitting three；
(5) the antidetonation diagonal brace of the antidetonation suspension and support to bolts at two ends under unknown torque condition applies one and step (2) phase
With the dynamic excitation of vibration, while sensor carries out data acquisition, is analyzed and processed to the data of sensor acquisition, Jin Erji
The characteristic frequency for calculating antidetonation suspension and support, according to the relationship curved surface of the characteristic frequency of calculated antidetonation suspension and support and step (4)
The map analysis respective torque value of bolts at two ends at this time, and then judge the bolt looseness shape at antidetonation diagonal brace both ends in antidetonation suspension and support
State.
Technical solution as a further improvement of that present invention, the step (2) specifically: to the antidetonation of antidetonation suspension and support
Diagonal brace applies one duration or the dynamic excitation of intermittent vibration, while sensor carries out data acquisition；Dynamic excitation is pre-
If stopping vibration after the time, while sensor stops carrying out data acquisition.
Technical solution as a further improvement of that present invention, the data to sensor acquisition are analyzed and processed,
And then calculate the characteristic frequency of antidetonation suspension and support specifically:
The signal data for obtaining sensor acquisition, selects the signal data of N number of vibration period for a computation interval, to M
Signal data in a computation interval is analyzed and processed respectively, is obtained the corresponding characteristic frequency of M computation interval, is sought
The average value of the corresponding characteristic frequency of M computation interval, using the average value as the characteristic frequency of antidetonation suspension and support, wherein
N is more than or equal to 2, M and is more than or equal to 2.
Technical solution as a further improvement of that present invention, it is yellow by Fourier transformation, wavelet transformation or Hilbert
The analysis method of transformation is respectively analyzed and processed the signal data in M computation interval, and it is right respectively to obtain M computation interval
The characteristic frequency answered.
Technical solution as a further improvement of that present invention, the sensor are acceleration transducer, the acceleration
Degree sensor is used to monitor the acceleration responsive of antidetonation suspension and support of the bolt at both ends under different torque conditions.
The invention has the benefit that
(1) present invention passes through the characteristic frequency for the antidetonation suspension and support that bolts at two ends is calculated under unknown torque condition
Established bolts at two ends analyzes corresponding bolts at two ends with the relationship surface chart of characteristic frequency under various torque conditions in turn
Respective torque, judges whether the bolt at antidetonation diagonal brace both ends in antidetonation suspension and support loose phenomenon occurs, so as to timely
The security risk of antidetonation suspension and support is monitored, data is provided for troubleshooting and supports, is realized real-time pre- when vibration signal is exceeded
It is alert, and then guarantee structure security reliability whole under geological process, it reduces and avoids secondary disaster as far as possible, it is existing without manpower
Field detecting bolt torque reduces manpower and material resources.
(2) sensor of the invention works asynchronously with the dynamic excitation of vibration, and sensor acquisition is actively shaken extraneous
Signal data under the conditions of dynamic, and be not that the signal data under natural environment vibration condition (needs precision very high merely
Sensor can just collect the lower signal data of natural environment vibration, and precision is higher, and sensor price is more expensive), thus
Invention can collect the signal data under the conditions of extraneous active vibration, precision using the sensor that precision is general, performance is poor
General biosensor power consumption is low, price is low, therefore inventive sensor use cost is low, can answer in batches antidetonation suspension and support
With.
Detailed description of the invention
Fig. 1 is layout drawing of the sensor of the present embodiment on antidetonation suspension and support.
Fig. 2 is the characteristic frequency of the present embodiment and the graph of relation of torque.
Specific embodiment
A specific embodiment of the invention is further illustrated below according to Fig. 1 to Fig. 2:
A kind of building aseismicity suspension and support performance state monitoring method, comprising the following steps:
(1) referring to Fig. 1, sensor 5, the antidetonation suspension and support 1 are installed at the middle part of the antidetonation diagonal brace 2 of antidetonation suspension and support 1
One end of antidetonation diagonal brace 2 be fixedly connected with top plate or floorboard 3 by bolt 4, the other end passes through bolt 4 and antidetonation suspension and support
Interior other components connection, the sensor 5 are used to monitor antidetonation of the bolt 4 at both ends under a variety of different torque conditions
The vibratory response of suspension and support；The monitoring method of the present embodiment is suitable for common antidetonation suspension and support in the market, although Fig. 1 is a kind of
The structural form of antidetonation suspension and support, it is understood by those skilled in the art that the monitoring method of the present embodiment is generally applicable to
The various antidetonation suspension and supports with antidetonation diagonal brace 2；
(2) apply the dynamic excitation of a vibration, while the sensing on antidetonation diagonal brace 2 to the antidetonation diagonal brace 2 of antidetonation suspension and support 1
Device 5 carries out data acquisition, specifically:
Duration or the intermittent external world to the one analogue mobile phone vibration intensity of application of antidetonation diagonal brace 2 of antidetonation suspension and support 1
Excitation, while the sensor 5 on antidetonation diagonal brace 2 carries out the data acquisition of vibration signal；Dynamic excitation stops after preset time
Vibration, while sensor 5 stops carrying out data acquisition；
(3) data acquired to sensor 5 are analyzed and processed, and then calculate the characteristic frequency of antidetonation suspension and support 1, are had
Body are as follows:
The signal data that sensor 5 acquires is obtained, with the signal data of N number of vibration period for a computation interval, obtains M
A computation interval carries out wavelet transformation analysis to the signal data in each computation interval of acquisition respectively, analyzes signal data
Frequency spectrum, take the peak point on frequency spectrum, i.e. fundamental frequency, using the frequency as the corresponding characteristic frequency of signal data, obtain each meter
Calculate the corresponding characteristic frequency of signal data in section；Under normal circumstances, the corresponding feature frequency of each computation interval
Rate is all equal, and in order to make to be accurately calculated, the present embodiment is made even after summing to the corresponding characteristic frequency of M computation interval
Mean value, using the average value as the characteristic frequency of antidetonation suspension and support 1, wherein N is more than or equal to 2, M and is more than or equal to 2；
(4) bolt 4 at both ends is calculated according to the method for step (2) and step (3) in a variety of different torque conditions
Under antidetonation suspension and support 1 characteristic frequency, analyze the respective torque value of bolts at two ends 4 and corresponding calculated antidetonation suspension and support 1
Characteristic frequency value corresponding relationship, the characteristic frequency o'clock under obtained a variety of different torques is drawn on a figure, is made
The respective torque value of bolt 4 of three-dimensional figure, i.e. both ends marks in X-axis and Y-axis respectively, corresponding calculated antidetonation suspension and support 1
Characteristic frequency value marked on Z axis, to fit three-dimensional relationship surface chart；
(5) the antidetonation diagonal brace 2 of the antidetonation suspension and support 1 to bolts at two ends 4 under unknown torque condition applies one and step (2)
The dynamic excitation of identical vibration, while the sensor 5 on antidetonation diagonal brace 2 carries out signal data acquisition, the letter acquired to sensor 5
Number is handled according to the method analysis of step (3), and then calculates the characteristic frequency of antidetonation suspension and support 1, by antidetonation suspension and support 1
Characteristic frequency match with the relationship surface chart in step (4), the analysis respective torque value of bolts at two ends at this time.Pass through analysis
It is found that calculated characteristic frequency may correspond to a variety of torque values, therefore the respective torque value of bolts at two ends is analyzed at this time
Might have it is a variety of, as long as but torque value when the respective torque value comparison bolt fastening of the bolts at two ends that analyzes occur it is bright
Aobvious decline, then judge that loose phenomenon occurs in bolts at two ends, can monitor in time whether antidetonation suspension and support security risk occurs.And
The torque value range for the bolts at two ends that step (5) analyzes can also provide data for staff's troubleshooting of monitoring and support.
The present embodiment can also pass through the analysis methods such as Fourier transformation or Hilbert-Huang transform in addition to wavelet transformation
Signal data in computation interval is analyzed and processed, and then obtains the corresponding feature frequency of the signal data in computation interval
Rate.
The sensor 5 of the present embodiment is acceleration transducer, and the acceleration transducer is for monitoring the described of both ends
The acceleration responsive of antidetonation suspension and support of the bolt 4 under different torque conditions.Certainly, the sensor 5 of the present embodiment can also be adopted
With displacement sensor or strain transducer etc..
In Practical Project, it is fewer the case where bolts at two ends 4 all loosens generally occur, and most of the case where occurring are one end
Bolt 4 loosens, and other end bolt 4 does not loosen.For this kind of situation, need to only study when 4 pine of any end bolt in bolts at two ends 4
In dynamic situation, the vibratory response of sensor 5.Specifically: it is calculated according to the method for step (2) and step (3) and is wherein appointed
The characteristic frequency value of antidetonation suspension and support 1 of the meaning one end bolt 4 under different loosening states (i.e. when different torque values), fitting
The graph of relation of the different torque values of the end bolt 4 and the characteristic frequency value of corresponding calculated antidetonation suspension and support 1, it is then fixed
Phase applies the dynamic excitation of a vibration identical as step (2) to antidetonation diagonal brace 2 of the bolt 4 under unknown torque condition；Pass through biography
The data analysis meter of sensor acquisition calculates the characteristic frequency of antidetonation suspension and support 1, then the graph of relation by being fitted in advance obtains
The torque value of a corresponding bolt 4 judges whether have a bolt 4 to loosen on antidetonation suspension and support 1, to monitor in time anti-
Shake the security risk of suspension and support 1.The torque value of the corresponding bolt 4 of the calculated characteristic frequency of this kind of situation only has one kind, can be with
Accurate data support is provided for staff's troubleshooting of monitoring.Wherein graph of relation is as shown in Fig. 2, wherein ordinate
Characteristic frequency be antidetonation suspension and support 1 characteristic frequency, the torque of abscissa be loosening bolt 4 torque.
The sensor 5 of the present embodiment and the dynamic excitation of vibration work simultaneously, are simultaneously stopped work.Dynamic excitation can
It is realized using small vibrator, small vibrator is mounted on the antidetonation diagonal brace 2 of antidetonation suspension and support 1, small vibrator and biography
Sensor 5 is respectively connected with power supply and controller, and controller is used to control sensor 5 and small vibrator periodically works, small-sized
When vibrator works, the dynamic excitation of sustainable generation a period of time vibration, sensor 5 acquires the signal data under vibrating at this time
And be sent to controller and analyzed, controller analyzes the torque of the bolts at two ends 4 on antidetonation suspension and support 1 according to the method described above
Value, and then judge the loosening situation of the bolt of antidetonation suspension and support 1, data are provided for real-time early warning and are supported, there is periodically automatic prison
The advantage of 1 faulted condition of antidetonation suspension and support is surveyed, manpower on-site test mode is not necessarily to, reduces manpower and material resources.In addition, due to this implementation
The sensor 5 of example works asynchronously with dynamic excitation, and what the sensor 5 of the present embodiment acquired is in extraneous Active spurring vibration condition
Under signal data, and be not that signal data under natural environment vibration condition (needs sensitivity very high under this condition
Sensor can just collect signal data, and sensitivity is higher, and sensor price is more expensive), therefore the present embodiment only needs to use
The signal data acquisition under extraneous Active spurring vibration condition, therefore this can be realized in the sensor 5 that sensitivity is low, performance is poor
5 use cost of sensor of embodiment is low, can be applied in batches.
The present embodiment is bent by the relationship under established various states the model data obtained is analyzed under unknown state
Surface model or curve model obtain corresponding essential characteristic parameter, are troubleshooting so as to monitor security risk in time
It provides data to support, realizes real-time early warning when vibration signal is exceeded, and then guarantee structure safety whole under geological process
Reliability reduces and avoids secondary disaster as far as possible.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims
Subject to, replacement, deformation, the improvement that those skilled in the art that any pair of this technology is made is readily apparent that each fall within of the invention
Protection scope.
Claims (5)
1. a kind of building aseismicity suspension and support performance state monitoring method, which comprises the following steps:
(1) sensor is installed on the antidetonation diagonal brace of antidetonation suspension and support, one end of the antidetonation diagonal brace of the antidetonation suspension and support passes through
Bolt is connect with floorboard, and the other end is connect by bolt with other components in antidetonation suspension and support, and the sensor is for supervising
Survey the vibratory response of antidetonation suspension and support of the bolt at both ends under a variety of torque conditions；
(2) apply the dynamic excitation of vibration to the antidetonation diagonal brace of antidetonation suspension and support, while sensor carries out data acquisition；
(3) data of sensor acquisition are analyzed and processed, and then calculate the characteristic frequency of antidetonation suspension and support；
(4) feature of antidetonation suspension and support of the bolts at two ends under a variety of torque conditions is calculated according to the method for step (2) and (3)
Frequency, the analysis respective torque value of bolts at two ends is with the corresponding relationship of the characteristic frequency value of antidetonation suspension and support and according to the corresponding pass
The relationship surface chart of system fitting three；
(5) the antidetonation diagonal brace of the antidetonation suspension and support to bolts at two ends under unknown torque condition applies a vibration identical as step (2)
Dynamic dynamic excitation, while sensor carries out data acquisition, is analyzed and processed to the data of sensor acquisition, and then calculate
The characteristic frequency of antidetonation suspension and support, according to the relationship surface chart of the characteristic frequency of calculated antidetonation suspension and support and step (4) point
The respective torque value of bolts at two ends at this time is analysed, and then judges the bolt looseness state at antidetonation diagonal brace both ends in antidetonation suspension and support.
2. building aseismicity suspension and support performance state monitoring method according to claim 1, which is characterized in that the step
(2) specifically: one duration or the dynamic excitation of intermittent vibration are applied to the antidetonation diagonal brace of antidetonation suspension and support, sensed simultaneously
Device carries out data acquisition；Dynamic excitation stops vibration after preset time, while sensor stops carrying out data acquisition.
3. building aseismicity suspension and support performance state monitoring method according to claim 2, which is characterized in that described to biography
The data of sensor acquisition are analyzed and processed, and then calculate the characteristic frequency of antidetonation suspension and support specifically:
The signal data for obtaining sensor acquisition, selects the signal data of N number of vibration period for a computation interval, counts to M
The signal data calculated in section is analyzed and processed respectively, obtains the corresponding characteristic frequency of M computation interval, seeks M
The average value of the corresponding characteristic frequency of computation interval, using the average value as the characteristic frequency of antidetonation suspension and support, wherein N is big
It is more than or equal to 2 in being equal to 2, M.
4. building aseismicity suspension and support performance state monitoring method according to claim 3, which is characterized in that pass through Fourier
The analysis method of transformation, wavelet transformation or Hilbert-Huang transform respectively divides the signal data in M computation interval
Analysis processing, obtains the corresponding characteristic frequency of M computation interval.
5. building aseismicity suspension and support performance state monitoring method according to any one of claims 1 to 4, which is characterized in that
The sensor is acceleration transducer, and the acceleration transducer is used to monitor the bolt at both ends in different torques
In the case of antidetonation suspension and support acceleration responsive.
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| CN201910500061.7A CN110160724A (en) | 2019-06-11 | 2019-06-11 | A kind of building aseismicity suspension and support performance state monitoring method |
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| CN201910500061.7A CN110160724A (en) | 2019-06-11 | 2019-06-11 | A kind of building aseismicity suspension and support performance state monitoring method |
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| CN111141472A (en) * | 2019-12-18 | 2020-05-12 | 梁启慧 | Anti-seismic support and hanger detection method and system |
| CN111981203A (en) * | 2020-08-03 | 2020-11-24 | 浙江航鑫支吊架有限公司 | Intelligent monitoring system for anti-seismic support and hanger based on Internet of things |
| CN112145907A (en) * | 2020-10-13 | 2020-12-29 | 蔡学潮 | Anti-drop self-display type anti-seismic support hanger |
| CN112378441A (en) * | 2020-10-12 | 2021-02-19 | 浙江航鑫支吊架有限公司 | Intelligent anti-seismic support and hanger system based on Internet of things |
| WO2021046847A1 (en) * | 2019-09-14 | 2021-03-18 | 南京东南建筑机电抗震研究院有限公司 | Method for designing anti-seismic support and hanger for building on the basis of three-dimensional model-simulation experimental data coupling |
| CN113295301A (en) * | 2021-05-25 | 2021-08-24 | 广东电网有限责任公司惠州供电局 | Soil stress monitoring device |
| CN114323521B (en) * | 2021-12-30 | 2024-03-08 | 筑美抗震支架技术(烟台)有限公司 | Intelligent monitoring cloud platform system of anti-seismic and shock-insulation support |
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Application publication date: 20190823 |
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