CN106338338A - Failed rod member monitoring method for wide-span special grid structure - Google Patents
Failed rod member monitoring method for wide-span special grid structure Download PDFInfo
- Publication number
- CN106338338A CN106338338A CN201610916688.7A CN201610916688A CN106338338A CN 106338338 A CN106338338 A CN 106338338A CN 201610916688 A CN201610916688 A CN 201610916688A CN 106338338 A CN106338338 A CN 106338338A
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- CN
- China
- Prior art keywords
- memeber
- failure
- rod member
- dynamic response
- monitoring method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention discloses a failed rod member monitoring method for a wide-span special grid structure. The failed rod member monitoring method includes the steps of S1, arranging a plurality of sensors on nodes of the wide-span special grid structure to serve as monitoring points, monitoring the dynamic response of the nodes of the wide-span special grid structure, and the sensors capturing the dynamic response signal change of the nodes in a broken rod influenced area on a real-time basis at the moment when partial rod members of the wide-span special grid structure break, S2, determining the area where the failed rod is situated according to the dynamic response signal change of the nodes monitored on each monitoring point, and S3, obtaining intersection to determine the specific position of the failed rod member according to an area set which is determined by a plurality of monitoring points to indicate the position of the failed rod member. According to the failed rod member monitoring method for a wide-span special grid structure, real-time and on-line monitoring and timely feedback control are realized, and safety performance of the wide-span special grid structure during service period can be ensured.
Description
Technical field
The present invention relates to a kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method, belong to architectural engineering technology neck
Domain.
Background technology
Due to Responses of Long-Span Spatial Lattice Structures node numerous it is contemplated that economy, ess-strain prison is carried out to all rod members
Control is irrational, but only local rod member is carried out with ess-strain monitoring deficiency with the knot in real time and under seizure node random disruptions
Structure is corresponding, and deformation monitoring more accurate method is still total powerstation monitoring based on optical principle at present, from light characteristics and
For the security monitoring cost control angularly of space structure, also cannot realize round-the-clock monitor in real time.Therefore, for solving this
One difficult problem, the present invention proposes a kind of safe on-line monitoring method of Responses of Long-Span Spatial Lattice Structures based on node vibrations characteristic.
Content of the invention
The technical problem to be solved be to provide a kind of can achieve in real time, on-line checking, feedback control in time it is ensured that
Responses of Long-Span Spatial Lattice Structures security performance during service, and simple to operation, it is easy to engineering staff rapidly to mistake
The Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method that effect rod member is positioned and changed.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method, comprises the following steps:
S1, arranges that on the node of Responses of Long-Span Spatial Lattice Structures some sensors, as measuring point, monitor large span space grid
The dynamic response of structure node, institute's placement sensor destroys moment in the local rod member of Responses of Long-Span Spatial Lattice Structures, catches in real time
Catch the node dynamic response signal intensity situation in disconnected bar influence area；
S2, the node dynamic response signal intensity situation being monitored according to each measuring point, determine failure memeber region；
S3, failure memeber region collection according to determined by multiple measuring points, seek common ground and determine concrete position that failure memeber is located
Put.
Described sensor includes velocity sensor and acceleration transducer.
Described dynamic response signal includes speed and acceleration.
Multiple measuring points in s3 are at least 3, and that is, the position of sensor is: the fracture power of each local rod member
Response has at least 3 sensors to capture dynamic response signal.
The lower limit of dynamic response signal intensity situation determines according to sensor accuracy, that is, determine failure memeber region
Dynamic response signal intensity value be until sensor display situation of change be 0 when, if i.e. acceleration of vibration amplitude very little, or
Person hardly changes and does not just consider.
A kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method that the present invention provides, using the disconnected bar of sensor measurement
When node vibrations characteristic, so that it is determined that failure memeber region；The common factor asking for multiple measuring points again determines inefficacy bar
Part place particular location, failure memeber accurate positioning, can achieve in real time, on-line checking, feedback control in time is it is ensured that large span space net
Lattice structure security performance during service, and this failure memeber monitoring method is simple to operation, is easy to engineering staff fast
Speed is positioned to failure memeber and is changed, testing cost low it is adaptable to wide popularization and application.
Figure of description
Fig. 1 is that in the present invention, local rod member destroys moment, the node dynamic response signal intensity figure in disconnected bar influence area；
Fig. 2 is the structural representation of failure memeber place particular location in the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
As shown in Fig. 1 ~ Fig. 2, node is the important tie that Responses of Long-Span Spatial Lattice Structures connects.The destruction of node will affect
The Path of Force Transfer of structural member, its destructive process is also that rod member lost efficacy, and structural internal force occurs the process of redistribution.A kind of large span
Spatial mesh structure failure memeber monitoring method, when being mainly based upon disconnected bar, the vibration characteristics of its connected node proposes, and research is disconnected
The influence area of the dynamic response of connected node and disconnected bar during bar, implementation steps are divided into 3 steps: s1, in large span space grid knot
Arrange on the node of structure that some sensors, as measuring point, are monitored the dynamic response of Responses of Long-Span Spatial Lattice Structures node, arranged
Sensor destroys moment in the local rod member of Responses of Long-Span Spatial Lattice Structures, the node power that real-time capture breaks in bar influence area
Response signal situation of change；S2, the node dynamic response signal intensity situation being monitored according to each measuring point, determine inefficacy bar
Part region；S3, failure memeber region collection according to determined by multiple measuring points, seek common ground and determine that failure memeber is located
Particular location.
Described sensor includes velocity sensor and acceleration transducer.
Described dynamic response signal includes speed and acceleration.
Multiple measuring points in s3 are 3, and that is, the position of sensor is: the fracture dynamic response of each local rod member
3 sensors are had to capture dynamic response signal.
The above be only the preferred embodiment of the present invention it should be pointed out that: for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method is it is characterised in that comprise the following steps:
S1, arranges that on the node of Responses of Long-Span Spatial Lattice Structures some sensors, as measuring point, monitor large span space grid
The dynamic response of structure node, institute's placement sensor destroys moment in the local rod member of Responses of Long-Span Spatial Lattice Structures, catches in real time
Catch the node dynamic response signal intensity situation in disconnected bar influence area；
S2, the node dynamic response signal intensity situation being monitored according to each measuring point, determine failure memeber region；
S3, failure memeber region collection according to determined by multiple measuring points, seek common ground and determine concrete position that failure memeber is located
Put.
2. a kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method according to claim 1 it is characterised in that: institute
State sensor and include velocity sensor and acceleration transducer.
3. a kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method according to claim 1 it is characterised in that: institute
State dynamic response signal and include speed and acceleration.
4. a kind of Responses of Long-Span Spatial Lattice Structures failure memeber monitoring method according to any one of claim 1 ~ 3, it is special
Levy and be: the multiple measuring points in s3 are at least 3, that is, the position of sensor is: the fracture power of each local rod member
Response has at least 3 sensors to capture dynamic response signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916688.7A CN106338338A (en) | 2016-10-21 | 2016-10-21 | Failed rod member monitoring method for wide-span special grid structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916688.7A CN106338338A (en) | 2016-10-21 | 2016-10-21 | Failed rod member monitoring method for wide-span special grid structure |
Publications (1)
| Publication Number | Publication Date |
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| CN106338338A true CN106338338A (en) | 2017-01-18 |
Family
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| CN201610916688.7A Pending CN106338338A (en) | 2016-10-21 | 2016-10-21 | Failed rod member monitoring method for wide-span special grid structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595163A (en) * | 2004-06-25 | 2005-03-16 | 武汉理工大学 | Intelligent health observation system for roof network frame construction with large-scale complex body type |
| CN102830165A (en) * | 2011-06-17 | 2012-12-19 | 中国石油天然气集团公司 | Structural-dynamic-response jacket platform damage diagnosis method |
| CN103116759A (en) * | 2013-02-01 | 2013-05-22 | 北京工业大学 | Method applicable to identifying damage to space grid structure |
| CN103221814A (en) * | 2010-08-17 | 2013-07-24 | 韩国标准科学研究院 | Method and apparatus for locating a source of damage in a large composite material structure |
-
2016
- 2016-10-21 CN CN201610916688.7A patent/CN106338338A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595163A (en) * | 2004-06-25 | 2005-03-16 | 武汉理工大学 | Intelligent health observation system for roof network frame construction with large-scale complex body type |
| CN103221814A (en) * | 2010-08-17 | 2013-07-24 | 韩国标准科学研究院 | Method and apparatus for locating a source of damage in a large composite material structure |
| CN102830165A (en) * | 2011-06-17 | 2012-12-19 | 中国石油天然气集团公司 | Structural-dynamic-response jacket platform damage diagnosis method |
| CN103116759A (en) * | 2013-02-01 | 2013-05-22 | 北京工业大学 | Method applicable to identifying damage to space grid structure |
Non-Patent Citations (1)
| Title |
|---|
| 刘才玮 等: "基于动力测试的单层柱面网壳损伤定位与试验研究", 《土木工程学报》 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170118 |
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| RJ01 | Rejection of invention patent application after publication |