CN108007499B - A kind of block working state monitoring method for early warning of combination Computational Mechanics and field monitoring - Google Patents
A kind of block working state monitoring method for early warning of combination Computational Mechanics and field monitoring Download PDFInfo
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Abstract
The present invention provides the block working state monitoring method for early warning of a kind of combination Computational Mechanics and field monitoring, belong to block working state monitoring technical field.This method is classified the various load in working environment of blocking by harbor work's design standard, and the various load that block is subject to are transformed into the main rope of block.Solution is iterated to the main rope of block after load conversion by the method for Computational Mechanics, and introduce the geometry constraint conditions for main rope of blocking, it blocks under the action of various single environment load or combination environmental load the tensioning shape of main rope to solve block, the pulling force at point of interest.The Historical Monitoring data for choosing each section of block are compared；It determines the working strength limit of the block system under the effect of various load, and divides the security level of block system functional reliability, determine the alarming value and risk Metrics of each section of block, realize the early warning to block working condition and provide foundation for reasonable maintenance of blocking.
Description
Technical field
The invention belongs to working state monitoring technical fields of blocking, existing more particularly to a kind of combination Computational Mechanics and block
The block working state monitoring method for early warning of field monitoring technology.
Background technique
Nuclear power station and other coastal power plant extracting seawaters, cool down unit as cold source, intake is safe and reliable
Water intaking, it is most important to the production run in power plant.The block of intake is monitored and early warning is the one of cold source guarantee
Item important process.However, the science of block functional reliability grade divides and block functional reliability in block monitoring system
Early warning is the most key and core content in the block system monitoring work of nuclear plant water intaking mouth.
Currently, the main foundation and method of general engineering structure reliability analytical calculation have: engineering structure failure criteria
With the safe design grade of structure, various action effects and structure reactance Variability Analysis, conceptual schema and limit condition design
Method and the quality control and test method of structural timber and component etc..For different engineering structures, every kind of method
Respectively there is feature, more successful application is all obtained for certain particular problems.But nuclear plant water intaking mouth blocks dirty engineering
It is still in the Project And Exploring stage at present, can be followed without corresponding designing technique regulation or specification, although existing engineer application at present,
But only installed and safeguarded on the basis of existing engineering experience, due to lacking corresponding block functional reliability monitoring
Method for early warning, the maintenance and use for causing intake to be blocked are compared blindly, and more improper technical measures are different with reply
Strategy under operating condition.
Therefore, it is necessary to propose a set of practicable method, it is grading to the functional reliability of nuclear power station block system etc.
Row divides and to block system functional reliability early warning, is come with this syncaryon hydro plant intake block monitoring and warning system to nuclear power
Intake of standing block takes reasonable technical measures to be safeguarded and formulated the countermeasure under different loads operating condition.
Due to the installation randomness of block and the complexity of working condition, there are many factors that can not be determined, in addition extra large
The parameters such as wave, tide, local flow field, sea organism attachment amount (random) variation at any time, so that the work of nuclear plant water intaking mouth block
Making reliability step can not be obtained by experiment actual measurement and direct Numerical Simulation Analysis, the early warning to block system functional reliability
Work is even more that can not carry out.
Currently, still without being simulated for the finite element simulation of the flexible grid structures such as underwater block, fishing net.Therefore, from meter
The angle for calculating mechanics is set out, and is converted, then analyzed by reasonable mathematical computations to block whole audience load, is calculated every section and block
Processing is compared in calculated value and field monitoring value by the value of thrust at net measuring point, is blocked in conjunction with the determination of Historical Monitoring data
Net functional reliability grade, and realize based on this to block working condition monitoring and warning, for block normal work with
Maintenance provides the foundation and strategy of science.
Summary of the invention
In order to establish reasonable nuclear plant water intaking mouth block functional reliability monitoring and warning scheme, the present invention provide
A kind of block work state monitoring method based on Computational Mechanics and field monitoring will be blocked by some harbor work's design standards
Various load in net working environment are classified, and the various load that block is subject to are transformed into the main rope of block.Pass through meter
The method (virtual displacement and the principle of virtual work) for calculating mechanics, establishes corresponding computational format, carries out to the main rope of block after load conversion
Iterative solution, and the geometry constraint conditions for main rope of blocking are introduced, to solve block in various single environment load or combination
It blocks under the action of environmental load the tensioning shape of main rope, the pulling force at point (pulling force monitoring point) of interest.In addition, due to can not
Experiment test is carried out, therefore the Historical Monitoring data for choosing each section of block are compared, in the same section of history blocked prison
The block pulling force monitoring data under various load working conditions are selected in measured data, control unitary variant, are thus corrected each section of block and are carried
Lotus transformation model determines the calculating parameter of each net；In addition, determine the working strength limit of the block system under the effect of various load,
And the security level of block system functional reliability is divided, it determines the alarming value and risk Metrics of each section of block, realizes to block
The early warning of working condition simultaneously provides foundation for reasonable maintenance of blocking.
Technical solution of the present invention:
A kind of block working state monitoring method for early warning of combination Computational Mechanics and field monitoring, system used include blocking
Net site monitoring system, monitoring system database, load conversion module, computation analysis module, Modifying model module, monitoring and warning
Module；
The block site monitoring system is divided into waters acquisition module and land-based area receiving module, for acquiring at intake
Each section of block pulling force monitor value, the block environment shadow such as dimension information and intake tide, flow velocity, stormy waves, sea organism attachment amount
The factor of sound, in the database by the data storage of all acquisitions；
It is generated when the monitoring system database is for storing block monitoring system monitoring intake block a series of
Data, including date, time, pulling force monitor value, block dimension information and intake tide, flow velocity, stormy waves, sea organism attachment
The environmental impact factors such as amount, connect with load conversion module, provide required data for load simplification and conversion, while monitoring and being
System database provides Real-time Monitoring Data for the early warning of block system；
The load conversion module is connect with monitoring system database, carries out classification system to initial data obtained
Meter is blocked for same section, filters out the monitoring data (environmental data and block dimension data) under different loads operating condition.Control
Single environment load variable classifies the suffered environmental load of block according to relevant harbor work's design standard.Simplify according to load
Calculation formula determines the parameter in each section of block different loads reduced mechanical model monitored, finally determines the load of each section of block
Lotus converts calculation formula, provides the environmental load condition for calculating analysis to computation analysis module；The environmental load master of block
Be divided into four kinds: current load, wind load, seaway load and sea organism attachment amount, each formula difference are as follows:
In formula: FfIt is current load to the active force of block system, KfFor resistance to water-flow coefficient, γfFor the severe of water, vf
For the flow velocity of water, g is acceleration of gravity, hfFor the depth blocked in water.L is the span of block
In formula: FwIt is wind load to the active force of block system water face part buoy, KwFor coefficient of air resistance, γwFor sky
The severe of gas, vwFor wind speed, g is acceleration of gravity, hwThe height to expose the surface for buoy.LwFor block water surface part buoy
Length.
In formula: PsFor seaway load intensity, η is wave pressure intensity correction factor, 0.0≤η≤1.0.vwFor wind speed, h1
For half wave height of wave, h0For the distance at wave center to the water surface.L1For the half-wavelength of wave.
In formula: FmaxIt most exerts oneself for maximum of the wave to block, 0.0≤η≤1.0.vwFor wind speed, h0For wave center to water
The distance in face, d are the depth of water, DwIt is the incidence wave under current depth for the projection width L of floating body and wave force direction vertical plane
It is long.
According to the initial data that detection system provides, by the above active force in each section of block or the ginseng in intensity calculation formula
Number determines, calculates the load of each section of block in typical ambient conditions.
The basic principle of the computation analysis module is virtual displacement and the principle of virtual work in Computational Mechanics, introduces block master
The environmental load condition that rope geometry constraint conditions and load conversion module provide calculates one section of block in water flow, stormy waves, tide
Nighttide, sea organism attachment amount etc. are single or combine the tensioning shape of main rope under collective effect, tension, maximum vertical arc, swing angle etc.
As a result, the functional reliability early warning that is classified and blocks for subsequent block functional reliability provides foundation.It is specific to calculate analysis skill
Art scheme is as follows:
The main rope of garbage barrier net is discrete for n+1 sections of connecting rods, centre n smooth hinge connection, composition plane flexible cable leverage
Structure, two sections of constraints (forming n+2 hinge altogether) by smooth hinge buttress, block system integrally reach balance under external force
When some intermediate hinge simplify coordinate under referential OXY and be denoted as C (x blockingi,yi), the coordinate of hinged pier A is denoted as A (xA；yA)
=A (x0；y0), the coordinate of hinged pier B is denoted as B (xB；yB)=B (xn+1；yn+1), the effect of the position of A, B in external environmental load
Under do not change.
Discrete for after n+1 sections of connecting rods, a length of l of every section of axis by the main rope of garbage barrier neti(i=1 ... n+1), if certain section connects
Bar and the angle of X-axis are αi(i=1 ... n+1), obtains:
In formula (5), the n intermediate coordinate value C (x cut with scissorsi,yi) it is variable to be asked.
Active force in some intermediate hinge isWhereinWithHinge among respectively i-th
Active force is the known quantity being calculated by load conversion module along X, the component of Y-coordinate axle.
Act on external work on connecting rod hinged joint are as follows:
According to the virtual displacement principle of virtual work, when block system reaches balance, virtual work of all external force in any virtual displacement is
Zero, it follows that:
As it is assumed that each section of connecting rod rigidity, the virtual displacement between each hinged joint must satisfy certain geometry constraint conditions.
There should be following geometrical relationship to the adjacent hinged joint of any two:
Variation is asked to (8) formula, by the β in (5) formulai(8) formula after bringing variation into obtains any two hinged joint after abbreviation
The virtual displacement geometry compatible equations that should meet:
δyi=δ yi-1-βiδxi-1+βiδxi (9)
Formula (5)~(9) are that restrict main to block system simplifies whole controls of its equilibrium state curve of Structure Calculation and pulling force
Equation.
It brings formula (9) into formula (7) and considers to be displaced δ xiArbitrariness to get to about P0,Pn+1,Q0,Qn+1,βi(i=
1 ... n+1) nonlinear iteration equation group:
P0+Q0β1=0 (11)
Pn+1-Qn+1βn+1=0 (13)
If having acquired βiβ can be calculated by recursive expression (10)i+1.Then freely-supported pier boundary geometrical is supplemented about
Beam condition obtains a geometry and coordinates check equations:
During solving Nonlinear System of Equations (9)~(14), it is known that amount are as follows: joint load component PiAnd Qi(i=1 ...
N), the length l of each connecting rodi, main rope total length L of blocking, block the hinged pier node coordinate A (x in both ends boundary0；y0), B (xn+1；
yn+1).Unknown quantity to be asked are as follows: the β of every pull rodi(i=1 ... n+1), the support reaction P on hinged pier boundary0,Pn+1,Q0,Qn+1。
Specific iterative solution process is as follows:
(1) start: taking iterative calculation initial value, P0,Pn+1,Q0,Qn+1；
(2) β is calculated by formula (11)1。
(3) β is calculated separately out using recursive expression (10)i+1(i=1 ... n)；
(4) by βi+1(i=1 ... n) substitutes into geometry and coordinates check equations formula (15), can calculate one it is newValue；
(5) criteria for convergence is carried out: if meeting the condition of convergenceThen iterative calculation terminates；Continue to do step
(7), (8) and (9)；Otherwise step (6) are done；
(6) it utilizesCalculate the P of next iteration0,Pn+1,Q0,Qn+1Then return step
(2) until iterating to calculate convergence；
(7) β obtained according to iterative calculation convergencei(i=1 ... n+1) is calculated the counter-force of hinged pier by formula (10)~(14)
P0,Pn+1,Q0,Qn+1；
(8) β obtained according to iterative calculation convergencei(i=1 ... n+1) calculates α by formula (5)iThen it is not difficult to calculate
Position coordinates C (the x of any intermediate hinged joint outi,yi) (i=1 ... n)；
(9) according to the counter-force P of calculated support0,Pn+1,Q0,Qn+1The external force acted on intermediate hinged joint is known with oneself,
Calculate the component N of the main upper each section of pulling force of rope of garbage barrier netxiAnd Nyi(i=1 ... n).
So far, whole end reactions of strand cable-like flexible structure, the coordinate of any intermediate hinged joint and standby section tension value are counted
It calculates.
The Modifying model module is connected with load conversion module, computation analysis module and monitoring system database, will
Calculated result at the main rope point position of exported in computation analysis module each section block and allusion quotation corresponding in monitor database
Type block tension of main ropes monitoring result is compared, and optimizes and repairs to the parameter in each section of load simplified formula of blocking
Change, reduces the calculating precision of prediction that error improves model；
The monitoring and warning module is connect with computation analysis module, and monitoring and warning module mainly has two big functions.First is that
It is blocked by the monitoring data of analysis of history with the monitoring data of the block system destruction failure under extreme environment situation, determination several times
Ultimate strength value of each component part of net system under single environment load determines the main rope of block in the case where combining environmental load
Ultimate strength value；In addition monitoring and warning module can be real-time according to the following artificial predicting condition combination real-time monitoring system database
Monitoring information, prediction block functional reliability, sets about handling convenient for staff before bad working environments arriving.
Beneficial effects of the present invention:
1, main rope computation model of reasonably blocking is established as foundation using practical monitoring data of blocking, and proposed according to former
The computation model improvement project of beginning data, improves calculating reliability, make nuclear plant water intaking mouth block system have it is relatively reasonable can
By the calculation method of reacting quintessence；
2, according to the monitoring data of history, the working limit of block system components is determined；According to the block meter established
It calculates model and determines the operational failure limit of the block system under various single environment load in conjunction with measured data；By itself
Historical Monitoring data have divided block work safety grade and have referred to as early warning.
3, in conjunction with block pulling force real-time monitoring system and block computation model, with reference to the block work safety grade of formulation,
The functional reliability early warning work under single extreme loads or combined load can be carried out, to garbage barrier net for the scientific maintenance of block
With offer foundation is provided.
Detailed description of the invention
Fig. 1 is the block working state monitoring early warning institutional framework of combination Computational Mechanics of the present invention and field monitoring
Figure.
Fig. 2 is that block load of the present invention converts schematic diagram.
Fig. 3 is that block of the present invention deformation calculates schematic diagram.
Fig. 4 is that the computation analysis module of the present invention based on Computational Mechanics iterates to calculate flow chart.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and example, to this hair
It is bright to be further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to
Limit the present invention.
On the contrary, the present invention cover the substitution made in any spirit and scope of the invention being defined by the claims, modification,
Equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, the details of this civilization is retouched below
It is detailed to describe some specific detail sections in stating.The description of part without these details for a person skilled in the art
The present invention can also be understood completely.
Referring to Fig.1, the present invention includes following part: block site monitoring system, monitoring system database, load convert mould
Block, computation analysis module, Modifying model module, monitoring and warning module.
Wherein monitoring system database includes but is not limited to: the main rope actual measurement pulling force of block, each section of block position and size, wind
Speed, wind direction, unrestrained height, tide, flow velocity, each section of block sea organism attachment amount.
Specific implementation process of the invention is as follows:
(1) block site monitoring system is implemented to obtain the relevant initial data of block monitoring, and is stored in monitoring system
In system database.
(2) sequentially in time, the environmental load and the corresponding main rope of block blocked to each section are drawn monitoring system database
Power monitor value is stored.Monitoring system database provides Real-time Monitoring Data for the early warning of block system simultaneously.
(3) load conversion module reads relevant initial data from monitoring system database, to original number obtained
Statistic of classification is carried out according to according to current load, wind load, seaway load and sea organism attachment amount, is blocked for same section, screening
Monitoring data under different loads operating condition out.After carrying out separating variables to the data after screening, according to load reduced mechanical model,
It determines the parameter in each section of block different loads reduced mechanical model monitored, finally determines that the load conversion of each section of block calculates
Formula provides the environmental load condition for calculating analysis to computation analysis module.
(4) flow chart is iterated to calculate with reference to Fig. 4 computation analysis module, the ring provided by load conversion module in previous step
Border load-up condition, and the main rope geometry constraint conditions of block are introduced, it is attached in water flow, stormy waves, tide, marine growth to calculate one section of block
Under the single or combination collective effect such as amount the tensioning shape of main rope, tension, maximum vertical arc, swing angle etc. as a result, being next
The block functional reliability of step is classified and block functional reliability early warning provides foundation.
(5) result of each section of block in the case where determining load case is submitted to computation model adjustment mould by computation analysis module
Calculated result is compared with measured result for block, computation model adjustment module, and to the every load determined in step (3)
The parameter of calculation formula carries out difference and optimizes and revises, and repeats step (3), (4), (5), allows to miss until satisfaction setting
Difference finally determines the parameters in each environmental load calculation formula, as load conversion.
(6) in monitoring and warning module, first by the monitoring data of history in research and application system database and several times
The monitoring data of block system destruction failure under extreme environment situation, determine each component part of block system in single environment
Ultimate strength value under load determines ultimate strength value of the main rope of block in the case where combining environmental load；According further to staff
The predicting conditions combination real-time monitoring system database real-time monitoring information such as future weather, marine growth amount of offer, prediction block
Functional reliability sets about handling convenient for staff before bad working environments arriving.
Claims (1)
1. the block working state monitoring method for early warning of a kind of combination Computational Mechanics and field monitoring, which is characterized in that described
System used in working state monitoring method for early warning of blocking includes block site monitoring system, monitoring system database, load turn
Change module, computation analysis module, Modifying model module and monitoring and warning module；
The block site monitoring system is divided into waters acquisition module and land-based area receiving module, for acquiring at intake each section
Block pulling force monitor value, block dimension information and intake tide, flow velocity, stormy waves, sea organism attachment amount, by all acquisitions
Data are stored in monitoring system database；
The monitoring system database is used to store the volume of data generated when block monitoring system monitoring intake block,
Including date, time, pulling force monitor value, block dimension information and intake tide, flow velocity, stormy waves, sea organism attachment amount, with
The connection of load conversion module provides required data for load simplification and conversion, while monitoring system database is block system
Early warning provide Real-time Monitoring Data；
The load conversion module is connect with monitoring system database, carries out statistic of classification, needle to initial data obtained
It blocks to same section, filters out the monitoring data under different loads operating condition, including environmental data and block dimension data；Control is single
One environmental load variable classifies the suffered environmental load of block according to harbor work's design standard；Simplify according to load and calculates public affairs
Formula determines the parameter in each section of block different loads reduced mechanical model monitored, finally determines the load conversion of each section of block
Calculation formula provides the environmental load condition for calculating analysis to computation analysis module；The environmental load of block is broadly divided into
Four kinds: current load, wind load, seaway load and sea organism attachment amount, each formula difference are as follows:
In formula: FfIt is current load to the active force of block system, KfFor resistance to water-flow coefficient, γfFor the severe of water, vfFor water
Flow velocity, g are acceleration of gravity, hfFor the depth blocked in water, L is the span of block；
In formula: FwIt is wind load to the active force of block system water face part buoy, KwFor coefficient of air resistance, γwFor air
Severe, vwFor wind speed, g is acceleration of gravity, hwFor the height that buoy exposes the surface, LwFor the length for water surface part buoy of blocking；
In formula: PsFor seaway load intensity, η is wave pressure intensity correction factor, 0≤η≤1, vwFor wind speed, h1For wave
Half wave height, h0For the distance at wave center to the water surface, L1For the half-wavelength of wave；
In formula: FmaxIt is wave to the maximum force of block, 0≤η≤1, vwFor wind speed, h0For wave center to the water surface away from
From d is the depth of water, DwFor the projection width of floating body and wave force direction vertical plane, L2For the incident wavelength under current depth；
It is according to the initial data that detection system provides, the above active force in each section of block or the parameter in intensity calculation formula is true
It is fixed, calculate load of each section of block under current environmental condition；
The basic principle of the computation analysis module is virtual displacement and the principle of virtual work in Computational Mechanics, and it is several to introduce the main rope of block
The environmental load condition that constraint condition and load conversion module provide calculates one section of block in water flow, stormy waves, tide, sea
Biological attachment amount is single or combines the tensioning shape of main rope under collective effect, tension, maximum vertical arc, swing angle as a result, after being
The continuous classification of block functional reliability and block functional reliability early warning provides foundation；Specific calculate is analyzed as follows:
By the main rope of block it is discrete be n+1 section connecting rods, centre is connected with n smooth hinge, composition plane flexible cable member structure, two
Constraint of the section by smooth hinge buttress forms n+2 hinge, when block system integrally reaches balance under external force in some altogether
Between hinge block simplify referential OXY under coordinate be denoted as C (xi,yi), the coordinate of hinged pier A is denoted as A (xA；yA)=A (x0；
y0), the coordinate of hinged pier B is denoted as B (xB；yB)=B (xn+1；yn+1), the position of hinged pier A and hinged pier B are in external environmental load
Under the action of do not change；
Discrete for after n+1 sections of connecting rods, a length of l of every section of axis by the main rope of blocki, i=1 ... n+1, if certain section of connecting rod and X-axis
Angle is αi, i=1 ... n+1 obtains:
In formula (5), the n intermediate coordinate value C (x cut with scissorsi,yi) it is variable to be asked；
Active force in some intermediate hinge isWherein,WithHinge is made among respectively i-th
Firmly along X, the component of Y-coordinate axle is the known quantity being calculated by load conversion module；
Act on external work on connecting rod hinged joint are as follows:
According to the virtual displacement principle of virtual work, when block system reaches balance, virtual work of all external force in any virtual displacement is zero, by
This is obtained:
As it is assumed that each section of connecting rod rigidity, the virtual displacement between each hinged joint must satisfy certain geometry constraint conditions, to appointing
Two adjacent hinged joints of meaning should have following geometrical relationship:
(xi-xi-1)2+(yi-yi-1)2=li 2 (8)
Variation is asked to (8) formula, by the β in (5) formulai(8) formula after bringing variation into, obtaining any two hinged joint after abbreviation should
The virtual displacement geometry compatible equations of satisfaction:
δyi=δ yi-1-βiδxi-1+βiδxi (9)
Formula (5)~(9) are that restrict main to block system simplifies whole governing equations of Structure Calculation its equilibrium state curve and pulling force；
It brings formula (9) into formula (7), and considers to be displaced δ xiArbitrariness to get to about P0,Pn+1,Q0,Qn+1,βi, i=1 ... n
+ 1 nonlinear iteration equation group:
P0+Q0β1=0 (11)
Pn+1-Qn+1βn+1=0 (13)
If having acquired βiβ can be calculated by recursive expression (10)i+1；Then freely-supported pier boundary geometrical constraint condition is supplemented,
It obtains a geometry and coordinates check equations:
During solving Nonlinear System of Equations (9)~(14), it is known that amount are as follows: joint load component PiAnd Qi, i=1 ... n respectively connects
The length l of bari, main rope total length L of blocking ', block the hinged pier node coordinate A (x in both ends boundary0；y0), B (xn+1；yn+1)；Wait ask
Unknown quantity are as follows: the β of every pull rodi, i=1 ... n+1, the support reaction P on hinged pier boundary0,Pn+1,Q0,Qn+1；
Specific iterative solution process is as follows:
(1) start: taking iterative calculation initial value, P0,Pn+1,Q0,Qn+1；
(2) β is calculated by formula (11)1；
(3) β is calculated separately out using recursive expression (10)i+1, i=1 ... n；
(4) by βi+1, i=1 ... n substitutes into geometry and coordinates check equations formula (15), calculate one it is newValue；
(5) criteria for convergence is carried out: if meeting the condition of convergenceThen iterative calculation terminates；Continue to do step (7),
(8) and (9)；Otherwise step (6) are done；
(6) it utilizesβn+1、Calculate the P of next iteration0,Pn+1,Q0,Qn+1Then return step (2) until
Until iterative calculation convergence；
(7) β obtained according to iterative calculation convergencei, i=1 ... n+1, by the counter-force P of the hinged pier of formula (10)~(14) calculating0,
Pn+1,Q0,Qn+1；
(8) β obtained according to iterative calculation convergencei, i=1 ... n+1, by formula (5) calculating αiThen it is not difficult to calculate any centre
Position coordinates C (the x of hinged jointi,yi), i=1 ... n；
(9) according to the counter-force P of calculated support0,Pn+1,Q0,Qn+1The external force acted on intermediate hinged joint is known with oneself, is calculated
Block the component N of the upper each section of pulling force of main rope outxiAnd Nyi, i=1 ... n；
So far, whole end reactions of strand cable-like flexible structure, the coordinate of any intermediate hinged joint and standby section tension value calculate
Come；
The Modifying model module is connected with load conversion module, computation analysis module and monitoring system database respectively, will
The calculated result at the main rope point position of each section of block exported in computation analysis module is corresponding with monitoring system database
Block tension of main ropes monitoring result be compared, the parameter in each section of load simplified formula of blocking is optimized and is repaired
Change, reduces the calculating precision of prediction that error improves model；
The monitoring and warning module is connect with computation analysis module, and monitoring and warning module mainly has two big functions: first is that passing through
The monitoring data of block system destruction failure under the monitoring data of analysis of history and several times extreme environment situation, determine block system
Ultimate strength value of each component part of system under single environment load determines the limit of the main rope of block in the case where combining environmental load
Intensity value；Second is that monitoring and warning module is believed according to the following artificial predicting condition combination real-time monitoring system database real-time monitoring
Breath, prediction block functional reliability, sets about handling convenient for staff before bad working environments arriving.
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| CN109872499B (en) * | 2018-12-25 | 2020-09-29 | 大连理工大学 | Block on-spot monitoring alarm system based on image recognition |
| CN110887591B (en) * | 2019-11-14 | 2023-11-07 | 深圳市永兴隆工业发展有限公司 | Nuclear power water intaking sea area block pulling force on-line monitoring system |
| CN113820061B (en) * | 2021-08-23 | 2023-05-30 | 苏州热工研究院有限公司 | Alarm method of interception net tension monitoring system |
| CN116108773B (en) * | 2023-03-06 | 2023-06-20 | 交通运输部天津水运工程科学研究所 | Simulation prediction method for silt back-siltation of water intake open channel under influence of flexible dirt blocking net |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206281630U (en) * | 2016-12-22 | 2017-06-27 | 交通运输部天津水运工程科学研究所 | Water intaking open channel flexibility garbage barrier net and linked network pier Hydrodynamic testing ＆ measuring system |
-
2017
- 2017-11-15 CN CN201711125683.3A patent/CN108007499B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206281630U (en) * | 2016-12-22 | 2017-06-27 | 交通运输部天津水运工程科学研究所 | Water intaking open channel flexibility garbage barrier net and linked network pier Hydrodynamic testing ＆ measuring system |
Non-Patent Citations (3)
| Title |
|---|
| 核电厂取水明渠增设拦污网的必要性分析;朱成军等;《机电信息》;20160331(第3期);第93-97页 |
| 核电站拦污网主绳拉力监测与分析;康君峰等;《低温建筑技术》;20170531;第39卷(第5期);第57-59、71页 |
| 田湾核电站二期取水明渠拦污网机械系统设计;陶军等;《起重运输机械》;20170831(第8期);第45-50页 |
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