CN106250624B - The security assessment method of in-service steel tower - Google Patents
The security assessment method of in-service steel tower Download PDFInfo
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Abstract
The present invention relates to a kind of security assessment methods of in-service steel tower, including the following steps: (1) laboratory data simulation is carried out to power transmission tower frame, select tangent tower when digital simulation, when finite element modeling, the main material of pylon and oblique material use the BEAM188 unit simulation in ANSYS cell library；(2) statics Analysis is carried out under five kinds of wind directions to above-mentioned simulation power transmission tower frame, finds out the dangerous position under each wind direction of steel tower；(3) to carry out the comparison of the steel tower degree of wear, the part most slight to the in-service tower material of iron tower degree of wear is measured；(4) the steel tower dangerous position determined in step (2) is measured；(5) steel tower relative wear rate is calculated, security assessment result is provided.Mathematics projectional technique of the present invention is correct, and practical operation step is simple, will not damage to tower body, and assessment result is accurate and reliable, provides good judgment basis for assessment electric power pylon safety.
Description
Technical field
The invention belongs to T & D Technology field, especially a kind of security assessment method of in-service steel tower.
Background technique
Normal operation of the security and stability of electric power pylon concerning transmission line of electricity, steel tower be in for a long time route tension and compression stress,
Under the stress of the Various Complexes such as wind load, oscillating load, alternating load, the security performance decline of steel tower is easily fallen
The serious transmission line of electricity accident such as tower, broken string.Therefore, the security performance assessing in time, correctly carrying out steel tower has important work
Journey practical significance.
Conventional steel tower safety evaluation method is that visual, size positions measurement, table are carried out to tower material stress concentration portion position
Face non-destructive testing etc., it is low that the limitation of detection method often results in assessment result inaccuracy, reliability.Laboratory is carried out to tower material
Assessment result is accurately credible, but needs to cut tower material, destroys steel tower tower body.Reliable currently without a kind of data,
To the security performance assessing method for the in-service steel tower that tower material does not damage.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, and propose a kind of security assessment method of in-service steel tower.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of security assessment method of in-service steel tower, it is as follows that the method comprising the steps of:
(1) laboratory data simulation being carried out to power transmission tower frame, when digital simulation, selects tangent tower, when finite element modeling, tower
The main material of frame and oblique material use the BEAM188 unit simulation in ANSYS cell library,
(2) to above-mentioned simulation power transmission tower frame under five kinds of wind directions, according to the difference of electric power pylon front face area, wind load is not
Together, statics Analysis is carried out to electric power pylon, finds out the dangerous position under each wind direction of steel tower；
(3) part most slight to the in-service tower material of iron tower degree of wear measures,
To carry out the comparison of the steel tower degree of wear, the tower material of the most slight part of the degree of wear is chosen, that is, leeward carries out
Thickness of coating measurement, specific measurement method are as follows:
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings M1To Mn, calculate tower material at this
Thickness of coating average value,
Tower material thickness of coating variance:
D if (M) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the thickness re-measured
Read M1To MnThe calculating of E (M) and D (M) are carried out, if D (M)≤3, tower material coating uniformity is met the requirements, and is continued in next step
Rapid calculating,
If being still D (M) > 3, determine that the steel tower position thickness of coating is uneven, it is proposed that carry out relevant treatment as early as possible；
(4) to in-service steel tower maximum weighted face, i.e. danger in step (2) under each wind direction of the steel tower determined by test data
Dangerous position, specifically at steel tower tower leg main material 14-20m windward side carry out thickness of coating measurement, method particularly includes:
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings N1To Nn, calculate tower material at this
Thickness of coating average value,
Tower material thickness of coating variance:,
D if (N) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the thickness re-measured
Read N1To NnThe calculating of E (N) and D (N) are carried out, if D (N)≤3, tower material coating uniformity is met the requirements, it can continue to run,
If being still D (N) > 3, determining that the steel tower thickness of coating is uneven, i.e., there is concentrated wear in tower material stress surface,
Analytical calculation is carried out according to next step；
(5) steel tower relative wear rate is calculated, security assessment result is provided
According to the data in step (3) and (4), tower material average wear rate is calculated
If 0 < M≤35%, it is believed that mild wear occurs in the steel tower；If when 35 < M≤70%, it is believed that during the steel tower is
Degree abrasion；If when M > 70%, it is believed that severe abrasion occurs in the steel tower, it is proposed that handles as early as possible.
Moreover, when selecting tangent tower digital simulation in the step (1), tower height 44.5m is exhaled and is claimed height 24m, column foot ruler
Very little is 6.8m x6.8m, two kinds of angle steel of tower material model Q345 and Q235.
Moreover, five kinds of wind directions in the step (2) are specially 0 degree of wind direction, wind direction is parallel with conducting wire, perpendicular to cross-arm,
30 degree of wind directions, wind direction and conducting wire direction are in 30 degree, 45 degree wind directions, wind direction and conducting wire direction in 45 degree, 60 degree of wind directions, wind direction with lead
Line direction is in 60 degree and 90 degree of wind directions, and wind direction is parallel with cross-arm, perpendicular to conducting wire direction.
Moreover, the dangerous position in the step (2) under each wind direction of steel tower is specially that maximum displacement under 0 degree of wind direction is
221mm, at the cross-arm of steel tower top ground wire, maximum stress 186MPa, present in the 15m tower leg main material of windward side,
Stress raiser is mainly distributed at the windward side main material of 14-20m height；Maximum displacement under 30 degree of wind directions is 158mm, is located at
At the cross-arm of steel tower top ground wire, maximum stress 208MPa, present in the 15m tower leg main material of windward side, stress raiser
It is mainly distributed at the windward side main material of 14-20m height；Maximum displacement under 45 degree of wind directions is 180mm, is located at steel tower top
At the cross-arm of ground wire, maximum stress 216MPa, present in the 15m tower leg main material of windward side, stress raiser is mainly distributed on
At the windward side main material of 14-20m height；Maximum displacement under 60 degree of wind directions is 196mm, positioned at the cross-arm of steel tower top ground wire
Place, maximum stress 209MPa, present in the 15m tower leg main material of windward side, stress raiser is mainly distributed on 14-20m height
Windward side main material at；Maximum displacement under 90 degree of wind directions is 196mm, and at the cross-arm of steel tower top ground wire, maximum is answered
Power is 135MPa, and present in the 15m tower leg main material of windward side, stress raiser is mainly distributed on the windward side master of 14-20m height
At material；By the statics Analysis of the electric power pylon under 0 degree, 30 degree, 45 degree, 60 degree and 90 degree 5 different wind directions, steel tower
Windward side of the stress maximum value present in steel tower tower leg main material 15m, stress concentration portion position appears in the 14- of steel tower tower leg main material
At 20m, the main material and cross-arm of the height are electric power pylon more dangerous position.
The positive effect of the present invention
The invention proposes a kind of security assessment method that electric power pylon is in-service, this method passes through lab analysis and mould
Type emulation, mathematics projectional technique hold water, and practical operation step is simple, will not damage to tower body, can be applied to in-service
The safety evaluation of steel tower, assessment result is accurate and reliable, provides good judgment basis for assessment electric power pylon safety, right
Route operation maintenance personnel has good directive function, effectively maintains the safe and stable operation of transmission line of electricity, has preferable work
Journey practical significance.
Detailed description of the invention
Attached drawing 1 is electric power pylon displacement diagram under 0 degree of wind direction；
Attached drawing 2 is Stress Map at electric power pylon 14-20m under 0 degree of wind direction；
Attached drawing 3 is electric power pylon displacement diagram under 30 degree of wind directions；
Attached drawing 4 is Stress Map at electric power pylon 14-20m under 30 degree of wind directions；
Attached drawing 5 is electric power pylon displacement diagram under 45 degree of wind directions；
Attached drawing 6 is Stress Map at electric power pylon 14-20m under 45 degree of wind directions；
Attached drawing 7 is electric power pylon displacement diagram under 60 degree of wind directions；
Attached drawing 8 is Stress Map at electric power pylon 14-20m under 60 degree of wind directions；
Attached drawing 9 is electric power pylon displacement diagram under 90 degree of wind directions；
Attached drawing 10 is Stress Map at electric power pylon 14-20m under 90 degree of wind directions；
Specific embodiment
The embodiment of the present invention is further described below: it is emphasized that embodiment of the present invention is explanation
Property, without being restrictive, therefore the present invention is not limited to the embodiments described in specific embodiment, all by this field
The other embodiment that technical staff obtains according to the technique and scheme of the present invention, also belongs to the scope of protection of the invention.
A kind of security assessment method of in-service steel tower, this method pass through laboratory mechanical simulation iron tower structure and stress point
Analysis, finds out stress concentration portion position of the steel tower under different wind directions, to find out steel tower maximum weighted face.Maximum weighted face to
Wind, leeward side carry out the measurement of multiple spot thickness of coating, and situation is thinned to thickness of coating using statistical method and analyzes, that is, analyzes
Steel tower abrasion loss provides the judgement of steel tower abrasion condition, and then assesses steel tower safety, and the method comprising the steps of such as
Under:
(1) laboratory data simulation being carried out to power transmission tower frame, when digital simulation, selects tangent tower, when finite element modeling, tower
The main material of frame and oblique material use the BEAM188 unit simulation in ANSYS cell library, and as a specific example, tower height is
44.5m is exhaled and is claimed height 24m, and column foot is having a size of 6.8m x6.8m, two kinds of angle steel of tower material model Q345 and Q235；
(2) to above-mentioned simulation power transmission tower frame under five kinds of wind directions, according to the difference of electric power pylon front face area, wind load is not
Together, statics Analysis is carried out to electric power pylon, finds out the dangerous position under each wind direction of steel tower,
Wherein, the wind direction in five kinds of directions is respectively 0 degree of wind direction, and wind direction is parallel with conducting wire, perpendicular to cross-arm, 30 degree of wind directions,
Wind direction and conducting wire direction are in 30 degree, 45 degree of wind directions, and wind direction and conducting wire direction are in 45 degree, 60 degree of wind directions, and wind direction is in conducting wire direction
60 degree, 90 degree of wind directions, wind direction is parallel with cross-arm, perpendicular to conducting wire direction.By each height when progress static analysis in ANSYS
Wind load (KN/m2) be averagely applied in each node in this section, the wind load of the different height of different wind directions applied
Lotus size is listed in the table below:
Calculation and Analysis of Static Force is carried out using FEM-software ANSYS, is analyzed using beam188 beam element, beam section
It is defined as L-angle steel, assigns material properties, grid division to model, by tower root staff cultivation, applies wind load and conductor load,
It carries out solving maximum displacement and the maximum stress obtained under each wind direction.
Maximum displacement under 0 degree of wind direction is 221mm, at the cross-arm of steel tower top ground wire.As shown in Figure 1, maximum
Stress is 186MPa, present in the 15m tower leg main material of windward side.Stress raiser is mainly distributed on the windward side of 14-20m height
At main material, as shown in Figure 2；
Maximum displacement under 30 degree of wind directions is 158mm, at the cross-arm of steel tower top ground wire, as shown in figure 3, maximum
Stress is 208MPa, present in the 15m tower leg main material of windward side, the main integrated distribution of stress raiser meeting in 14-20m height
At the main material of wind face, as shown in Figure 4:
Maximum displacement under 45 degree of wind directions is 180mm, at the cross-arm of steel tower top ground wire, as shown in figure 5, maximum
Stress is 216MPa, present in the 15m tower leg main material of windward side, the main integrated distribution of stress raiser meeting in 14-20m height
At the main material of wind face, as shown in Figure 6；
Maximum displacement under 60 degree of wind directions is 196mm, at the cross-arm of steel tower top ground wire, as shown in fig. 7, maximum
Stress is 209MPa, present in the 15m tower leg main material of windward side.The main integrated distribution of stress raiser meeting in 14-20m height
At the main material of wind face, as shown in Figure 8:
Maximum displacement under 90 degree of wind directions is 196mm, at the cross-arm of steel tower top ground wire, as shown in figure 9, maximum
Stress is 135MPa, present in the 15m tower leg main material of windward side, the main integrated distribution of stress raiser meeting in 14-20m height
At the main material of wind face, as shown in Figure 10；
By the statics Analysis of the electric power pylon under 0 degree, 30 degree, 45 degree, 60 degree and 90 degree 5 different wind directions, from
The above results can be seen that under wind load and constraint condition collective effect, and electric power pylon displacement deformation is not significant, the stress of steel tower
Windward side of the maximum value present in steel tower tower leg main material 15m, biggish stress concentration portion position all concentrate on steel tower tower leg main material
14-20m at, the main material and cross-arm of the height are electric power pylon more dangerous point, in subsequent security performance assessing Shi Yingzuo
It is monitored and measures for important position；
(3) in-service tower material of iron tower bottom is measured
To carry out the comparison of the steel tower degree of wear, to the steel tower for needing to carry out safety evaluation, it is most slight to choose the degree of wear
Tower material leg leeward carry out thickness of coating measurement；
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings M1To Mn, calculate tower material at this
Thickness of coating average value,
Tower material thickness of coating variance:.
D if (M) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the thickness re-measured
Read M1To MnThe calculating of E (M) and D (M) are carried out, if D (M)≤3, tower material coating uniformity is met the requirements, and is continued in next step
Rapid calculating.
If being still D (M) > 3, determine that the steel tower position thickness of coating is uneven, it is proposed that carry out relevant treatment as early as possible.
(4) in-service steel tower maximum weighted face is measured
According to the dangerous position under each wind direction of the steel tower determined by test data in step (2), thickness of coating survey is carried out
Amount, windward side carries out thickness of coating measurement specifically at steel tower tower leg main material 14-20m；
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings N1To Nn, calculate tower material at this
Thickness of coating average value,
Tower material thickness of coating variance:.
D if (N) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the thickness re-measured
Read N1To NnThe calculating of E (N) and D (N) are carried out, if D (N)≤3, tower material coating uniformity is met the requirements, and can be continued to run；
If being still D (N) > 3, determining that the steel tower thickness of coating is uneven, i.e., there is concentrated wear in tower material stress surface,
Analytical calculation is carried out according to next step.
(5) steel tower relative wear rate is calculated
According to the data in step (3) and (4), tower material average wear rate is calculated
D if (N) > 3, and when 0 < M≤35%, it is believed that there is mild wear in the steel tower；If recognizing when 35 < M≤70%
It is moderate abrasion for the steel tower；If when M > 70%, it is believed that severe abrasion occurs in the steel tower, it is proposed that handles as early as possible.
Claims (4)
1. a kind of security assessment method of in-service steel tower, it is characterised in that it is as follows that the method comprising the steps of:
(1) laboratory data simulation being carried out to power transmission tower frame, when digital simulation, selects tangent tower, when finite element modeling, pylon
Main material and oblique material use the BEAM188 unit simulation in ANSYS cell library,
(2) to above-mentioned simulation power transmission tower frame under five kinds of wind directions, according to the difference of electric power pylon front face area, wind load is different,
Statics Analysis is carried out to electric power pylon, finds out the dangerous position under each wind direction of steel tower；
(3) part most slight to the in-service tower material of iron tower degree of wear measures,
To carry out the comparison of the steel tower degree of wear, the tower material of the most slight part of the degree of wear is chosen, that is, leeward carries out coating
Thickness measure, specific measurement method are as follows:
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings M1To Mn, tower material coating at this is calculated
Thickness average value,
Tower material thickness of coating variance:
D if (M) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the caliper readings re-measured
M1 to Mn carries out the calculating of E (M) and D (M), if D (M)≤3, tower material coating uniformity is met the requirements, and continues next step
Calculating,
If being still D (M) > 3, determine that the steel tower position thickness of coating is uneven, it is proposed that carry out relevant treatment as early as possible；
(4) to in-service steel tower maximum weighted face, i.e. dangerous portion in step (2) under each wind direction of the steel tower determined by test data
Position, specifically steel tower tower leg main material 14-20m at windward side progress thickness of coating measurement, method particularly includes:
Position is tested in tower material with coating thickness detector and measures n point, records caliper readings N1To Nn, calculate tower material coating at this
Thickness average value,
Tower material thickness of coating variance:
D if (N) > 3, tower material coating uniformity is unsatisfactory for requiring, and re-starts measurement, utilizes the caliper readings N re-measured1
To NnThe calculating of E (N) and D (N) are carried out, if D (N)≤3, tower material coating uniformity is met the requirements, it can continue to run,
If being still D (N) > 3, determining that the steel tower thickness of coating is uneven, i.e., there is concentrated wear in tower material stress surface, according to
Next step carries out analytical calculation；
(5) steel tower relative wear rate is calculated, security assessment result is provided
According to the data in step (3) and (4), tower material average wear rate is calculated
If 0 < X≤35%, it is believed that mild wear occurs in the steel tower；If when 35 < X≤70%, it is believed that the steel tower is moderate abrasion；
If when X > 70%, it is believed that severe abrasion occurs in the steel tower, it is proposed that handles as early as possible.
2. the security assessment method of in-service steel tower according to claim 1, it is characterised in that: choosing in the step (1)
When with tangent tower digital simulation, tower height 44.5m is exhaled and is claimed height 24m, and column foot is having a size of 6.8m x 6.8m, tower material model
For two kinds of angle steel of Q345 and Q235.
3. the security assessment method of in-service steel tower according to claim 1, it is characterised in that: in the step (2)
Five kinds of wind directions are specially 0 degree of wind direction, and wind direction is parallel with conducting wire, and perpendicular to cross-arm, 30 degree of wind directions, wind direction and conducting wire direction are in 30
Degree, 45 degree of wind directions, wind direction and conducting wire direction are in 45 degree, 60 degree of wind directions, and wind direction and conducting wire direction are in 60 degree and 90 degree of wind directions, wind direction
It is parallel with cross-arm, perpendicular to conducting wire direction.
4. the security assessment method of in-service steel tower according to claim 1, it is characterised in that: iron in the step (2)
Dangerous position under each wind direction of tower is specially that the maximum displacement under 0 degree of wind direction is 221mm, positioned at the cross-arm of steel tower top ground wire
Place, maximum stress 186MPa, present in the 15m tower leg main material of windward side, stress raiser is mainly distributed on 14-20m height
Windward side main material at；Maximum displacement under 30 degree of wind directions is 158mm, and at the cross-arm of steel tower top ground wire, maximum is answered
Power is 208MPa, and present in the 15m tower leg main material of windward side, stress raiser is mainly distributed on the windward side master of 14-20m height
At material；Maximum displacement under 45 degree of wind directions is 180mm, at the cross-arm of steel tower top ground wire, maximum stress 216MPa,
Present in the 15m tower leg main material of windward side, stress raiser is mainly distributed at the windward side main material of 14-20m height；60 degree of wind
Downward maximum displacement is 196mm, and at the cross-arm of steel tower top ground wire, maximum stress 209MPa is appeared in windward
At the 15m tower leg main material of face, stress raiser is mainly distributed at the windward side main material of 14-20m height；Maximum under 90 degree of wind directions
Displacement is 196mm, and at the cross-arm of steel tower top ground wire, maximum stress 135MPa appears in windward side 15m tower leg master
At material, stress raiser is mainly distributed at the windward side main material of 14-20m height；By 0 degree, 30 degree, 45 degree, 60 degree with
And under 90 degree 5 different wind directions electric power pylon statics Analysis, the stress maximum value of steel tower appears in steel tower tower leg main material 15m
The windward side at place, present in the 14-20m of steel tower tower leg main material, the main material and cross-arm of the height are transmission of electricity for stress concentration portion position
Steel tower more dangerous position.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105468876A (en) * | 2015-12-28 | 2016-04-06 | 国网山东省电力公司经济技术研究院 | Real-time online evaluation method and system for safety state of power transmission tower |
| CN105740546A (en) * | 2016-02-01 | 2016-07-06 | 国家电网公司 | Transmission tower and ground wire security evaluation and service life prediction system based on corrosion state |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105468876A (en) * | 2015-12-28 | 2016-04-06 | 国网山东省电力公司经济技术研究院 | Real-time online evaluation method and system for safety state of power transmission tower |
| CN105740546A (en) * | 2016-02-01 | 2016-07-06 | 国家电网公司 | Transmission tower and ground wire security evaluation and service life prediction system based on corrosion state |
Non-Patent Citations (1)
| Title |
|---|
| 风致输电线路故障问题分析;代生丽,马超,赵震,刘威加;《科技资讯》;20111231;130-131 |
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