CN102393184A - Dynamic calculating method of wind-caused vibration and windage yaw of contact net of electrified railway - Google Patents
Dynamic calculating method of wind-caused vibration and windage yaw of contact net of electrified railway Download PDFInfo
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Abstract
The invention relates to a dynamic calculating method of wind-caused vibration and windage yaw of a contact net of an electrified railway. With the development of a high-speed railway, an influence degree on security of train operation by wind becomes more obvious; and effects of strong wind at a wind field and a wind gap as well as an effect of wind caused by train operation will enable large and complex vibration and windage yaw to occur at a contact net, so that a dynamic quality of high speed operation of a bow net will be influenced and bow net contact security will be threatened. The method comprises the following steps that: a wind tunnel test of a contact wire static force segment model is utilized to test an aerodynamic force parameter of a contact wire; a finite element model of wind-caused vibration and windage yaw of a contact net is established; average displacement of a contact net thread is calculated; and a spectral representation method is employed to simulate a turbulent flow wind speed time history and a time history analysis method is employed to calculate dynamic displacement of the contact net thread; and vertical average displacement and vertical dynamic displacement are superposed to obtain total displacement of wind-caused vibration of the contact net thread; and horizontal average displacement and horizontal average displacement are superposed to obtain total windage yaw of the contact net thread. According to the invention, a method is provided for dynamic calculation of wind-caused vibration and windage yaw of a contact net; and moreover, the method is suitable for application to power transmission line route.
Description
Technical field
The invention belongs to the railway electrification technical field, be specifically related to the Dynamic calculation method of a kind of electrification railway contact net wind-induced vibration and windage yaw.
Background technology
Along with the development of high-speed railway, particularly under adverse environment conditions such as Feng Qu, air port or action of train wind, the influence degree that the safety of train operation receives strong wind is outstanding further.According to the operation situation of domestic and international electric railway especially high-speed railway, because of wind-induced accident between pantograph increases year by year.Because action of train wind during the up-downgoing meeting in the wind effect in wind district, air port, the eddy current wind field effect of tunnel face or the tunnel; Can make contact net that bigger more complicated vibration and windage yaw take place; Not only influence bow net high-speed cruising dynamic mass, even threaten the bow net touch-safe, cause accident between pantograph and cause railway operation to interrupt.
Need badly and carry out wind-induced vibration and the research of windage yaw dynamic calculation; To analyze the especially generation cause of high-speed railway accident between pantograph of electric railway; The windproof strengthening measure design of guidance under adverse environment conditions such as Feng Qu, air port or action of train wind, the safe reliability of raising contact net system.At present in the world the Dynamic calculation method of contact net wind-induced vibration and windage yaw that is that all right is ripe; The domestic computing method that still lack the contact net wind-induced vibration; And that the windage yaw value of clue adopts the statics computing method be similar to by given even wind speed is definite, does not also work out the Dynamic calculation method of blast effect lower wire windage yaw.
Summary of the invention
The Dynamic calculation method that the purpose of this invention is to provide a kind of electrification railway contact net wind-induced vibration and windage yaw; Especially the dynamic calculation that can be used for adverse environment location contact net wind-induced vibrations such as wind district, air port and action of train wind and windage yaw; Instruct windproof strengthening measure design, improve the safe reliability of contact net system.
The technical scheme that the present invention adopted is:
The Dynamic calculation method of electrification railway contact net wind-induced vibration and windage yaw is characterized in that:
Realize by following steps:
Step 1: through the aerodynamic parameter of osculatory static(al) sections model wind tunnel test test osculatory;
Step 2: the nonlinear analysis through the catenary sag curve, the force analysis of steady arm and constraint apply sets up contact net wind-induced vibration and windage yaw finite element model;
Step 3: utilize aerodynamics Theoretical Calculation contact net clue average displacement, adopt the spectrum solution to simulate turbulent wind speed time-histories and calculate contact net clue dynamic displacement with employing time-history analysis method;
Step 4: the vertical average displacement that superposes obtains the wind-induced vibration total displacement of contact net clue under the blast effect with vertical dynamic displacement, and superpose horizontal average displacement and horizontal dynamic displacement obtain the total windage yaw of contact net clue under the blast effect.
The aerodynamic parameter of the osculatory described in the step 1 is three fens force coefficients of osculatory.
Contact net clue described in the step 3 is osculatory, carrier cable and additive wire.
The present invention has the following advantages and the beneficial effect of high-lighting:
The Dynamic calculation method of electrification railway contact net wind-induced vibration provided by the invention and windage yaw:
1) realized the dynamic calculation of contact net wind-induced vibration and windage yaw.
2) counting yield is high: adopt same contact net finite element model, can calculate wind-induced vibration shift value and windage yaw value simultaneously.
3) result parameter is comprehensive: wind-induced vibration total displacement and static component thereof (vertical average displacement), dynamic component (vertical dynamic displacement) all can calculate, and total windage yaw and static component (horizontal average displacement) thereof, dynamic component (horizontal dynamic displacement) all can calculate.
4) the method controllability is strong: set up contact net wind-induced vibration and windage yaw finite element parameterized model, can improve the speed of modelling, modification greatly.
5) applied widely: as not only can to calculate the wind-induced vibration displacement and the windage yaw of overhead contact line clue such as osculatory, carrier cable and additive wire, also can calculate the wind-induced vibration displacement and the windage yaw of electric power transmission line clue.
Description of drawings
Fig. 1 is a flow chart of steps of the present invention.
Fig. 2 is simple catenary suspension contact net wind-induced vibration and windage yaw finite element model figure.
Fig. 3 is the vertical average displacement result of calculation of simple catenary suspension contact net span centre figure.
Fig. 4 is the vertical turbulent wind speed time-histories figure of simple catenary suspension the 3rd span centre.
Fig. 5 is the vertical dynamic displacement maximum value calculation of simple catenary suspension contact net span centre figure as a result.
Fig. 6 is the vertical total displacement result of calculation of simple catenary suspension contact net span centre figure.
Embodiment
Below in conjunction with embodiment the present invention is carried out detailed explanation.
Carry out the dynamic calculation of electrification railway contact net wind-induced vibration shift value and windage yaw value referring to flow process shown in Figure 1, concrete steps are following:
Step 1: the aerodynamic parameter of test osculatory.
Through osculatory static(al) sections model wind tunnel test, the aerodynamic parameter of test osculatory is confirmed the wind load characteristic under the different wind conditions; The aerodynamic parameter of osculatory is three fens force coefficients of osculatory.
Because the shape of cross section of osculatory is the circle that has suspention groove, alloy species identification groove, non-general rule is round-shaped, therefore needs the aerodynamic parameter through osculatory static(al) sections model wind tunnel test test osculatory.
Step 2: set up contact net wind-induced vibration and windage yaw finite element model.
1) confirm the contact net technical conditions: dropper layout, tension force, wire rod model in suspension type, structure height, span, the span are that simple catenary suspension, structure height are that 950mm, span are that dropper interval 5m layout, wire rod model are JTMH120+CTMH150 in 50m, the span like the suspension type.
2) set up contact net cantilever structure model; Nonlinear analysis, steady arm force analysis and constraint through the catenary sag curve apply, and confirm each clue curve of suspension; Can realize the foundation of contact net wind-induced vibration and windage yaw finite element model, as shown in Figure 2.
Step 3: calculate average displacement and dynamic displacement.
Under certain wind speed parameter, as 10min mean wind speed size be 30,35,40,45m/s, the angle of attack is 10 °; Under above-mentioned contact net technical parameter,, as shown in Figure 3 based on vertical average displacement of aerodynamics Theoretical Calculation osculatory and horizontal average displacement.
Adopting the spectrum solution to simulate turbulent wind speed time-histories, is that the turbulent wind speed time-histories of 30m/s is example with simulation 10min mean wind speed size, as shown in Figure 4; Adopt the time-history analysis method to calculate vertical dynamic displacement of osculatory and horizontal dynamic displacement, get vertical dynamic displacement maximal value and horizontal shift maximal value, as shown in Figure 5.
Step 4: calculate wind-induced vibration total displacement, total windage yaw.
Vertical average displacement and vertical dynamic displacement maximal value are got and be worth, obtain the wind-induced vibration total displacement of osculatory under the blast effect, as shown in Figure 6; Horizontal average displacement and horizontal dynamic displacement maximal value are got and be worth, obtain the total windage yaw value of osculatory under the blast effect.
Embodiment of the present invention is not limited to the foregoing description, and the various variations of under the prerequisite that does not break away from aim of the present invention, making all belong within protection scope of the present invention.
Claims (3)
1. the Dynamic calculation method of electrification railway contact net wind-induced vibration and windage yaw is characterized in that:
Realize by following steps:
Step 1: through the aerodynamic parameter of osculatory static(al) sections model wind tunnel test test osculatory;
Step 2: the nonlinear analysis through the catenary sag curve, the force analysis of steady arm and constraint apply sets up contact net wind-induced vibration and windage yaw finite element model;
Step 3: utilize aerodynamics Theoretical Calculation contact net clue average displacement, adopt the spectrum solution to simulate turbulent wind speed time-histories and calculate contact net clue dynamic displacement with employing time-history analysis method;
Step 4: the vertical average displacement that superposes obtains the wind-induced vibration total displacement of contact net clue under the blast effect with vertical dynamic displacement, and superpose horizontal average displacement and horizontal dynamic displacement obtain the total windage yaw of contact net clue under the blast effect.
2. the Dynamic calculation method of electrification railway contact net wind-induced vibration according to claim 1 and windage yaw is characterized in that:
The aerodynamic parameter of the osculatory described in the step 1 is three fens force coefficients of osculatory.
3. the Dynamic calculation method of electrification railway contact net wind-induced vibration according to claim 1 and windage yaw is characterized in that:
Contact net clue described in the step 3 is osculatory, carrier cable and additive wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110195330 CN102393184A (en) | 2011-07-13 | 2011-07-13 | Dynamic calculating method of wind-caused vibration and windage yaw of contact net of electrified railway |
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| CN 201110195330 CN102393184A (en) | 2011-07-13 | 2011-07-13 | Dynamic calculating method of wind-caused vibration and windage yaw of contact net of electrified railway |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102673426A (en) * | 2012-05-31 | 2012-09-19 | 西南交通大学 | Method for determining fluctuation velocity and tension of contact line for high-speed rail in consideration of air damping |
| CN102798509A (en) * | 2012-08-13 | 2012-11-28 | 中铁第一勘察设计院集团有限公司 | Test method for high-speed railway contact network wind-induced response wind tunnel |
| CN104534989A (en) * | 2015-01-04 | 2015-04-22 | 同济大学 | Line space geometric state parameter detecting method for high-speed rail overhead line system |
| CN107146223A (en) * | 2017-04-27 | 2017-09-08 | 武汉大学 | A kind of analysis system and method for power transmission tower and power transmission line displacement coupling |
| CN108674256A (en) * | 2018-05-21 | 2018-10-19 | 梁可义 | A kind of support device of power contacts net |
| CN109444679A (en) * | 2018-10-19 | 2019-03-08 | 海南电网有限责任公司电力科学研究院 | A kind of 170mm insulator chain windage yaw distance calculating method |
| CN110455489A (en) * | 2019-08-09 | 2019-11-15 | 东南大学 | A kind of flow tunnel testing device measuring bridge subsection model of vibration Pressures |
| CN111339696A (en) * | 2019-12-30 | 2020-06-26 | 国网河南省电力公司郑州供电公司 | Train-crossing downwind line vibration response calculation method based on fluid-solid coupling |
| CN111859759A (en) * | 2020-07-22 | 2020-10-30 | 中南大学 | Wind load identification method for attitude decoupling of wind-induced railway contact network |
| CN114491895A (en) * | 2022-04-01 | 2022-05-13 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
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- 2011-07-13 CN CN 201110195330 patent/CN102393184A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102673426A (en) * | 2012-05-31 | 2012-09-19 | 西南交通大学 | Method for determining fluctuation velocity and tension of contact line for high-speed rail in consideration of air damping |
| CN102673426B (en) * | 2012-05-31 | 2014-05-28 | 西南交通大学 | Method for determining fluctuation velocity and tension of contact line for high-speed rail in consideration of air damping |
| CN102798509A (en) * | 2012-08-13 | 2012-11-28 | 中铁第一勘察设计院集团有限公司 | Test method for high-speed railway contact network wind-induced response wind tunnel |
| CN102798509B (en) * | 2012-08-13 | 2014-07-16 | 中铁第一勘察设计院集团有限公司 | Test method for high-speed railway contact network wind-induced response wind tunnel |
| CN104534989A (en) * | 2015-01-04 | 2015-04-22 | 同济大学 | Line space geometric state parameter detecting method for high-speed rail overhead line system |
| CN107146223B (en) * | 2017-04-27 | 2019-06-11 | 武汉大学 | The analysis system and method for a kind of power transmission tower and power transmission line displacement coupling |
| CN107146223A (en) * | 2017-04-27 | 2017-09-08 | 武汉大学 | A kind of analysis system and method for power transmission tower and power transmission line displacement coupling |
| CN108674256A (en) * | 2018-05-21 | 2018-10-19 | 梁可义 | A kind of support device of power contacts net |
| CN109444679A (en) * | 2018-10-19 | 2019-03-08 | 海南电网有限责任公司电力科学研究院 | A kind of 170mm insulator chain windage yaw distance calculating method |
| CN109444679B (en) * | 2018-10-19 | 2019-12-13 | 海南电网有限责任公司电力科学研究院 | 170mm insulator string windage yaw distance calculation method |
| CN110455489A (en) * | 2019-08-09 | 2019-11-15 | 东南大学 | A kind of flow tunnel testing device measuring bridge subsection model of vibration Pressures |
| CN111339696A (en) * | 2019-12-30 | 2020-06-26 | 国网河南省电力公司郑州供电公司 | Train-crossing downwind line vibration response calculation method based on fluid-solid coupling |
| CN111339696B (en) * | 2019-12-30 | 2023-04-07 | 国网河南省电力公司郑州供电公司 | Train-crossing downwind line vibration response calculation method based on fluid-solid coupling |
| CN111859759A (en) * | 2020-07-22 | 2020-10-30 | 中南大学 | Wind load identification method for attitude decoupling of wind-induced railway contact network |
| CN111859759B (en) * | 2020-07-22 | 2022-09-27 | 中南大学 | Wind load identification method for attitude decoupling of wind-induced railway contact network |
| CN114491895A (en) * | 2022-04-01 | 2022-05-13 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
| CN114491895B (en) * | 2022-04-01 | 2022-08-30 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
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Application publication date: 20120328 |