Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls
Aerial barrage balls serve for marking high-voltage wires in order to visually warn pilots of civil and military aviation about the presence of overhead lines. The present article deals with the mechanical calculation of flexible overhead wires of overhead lines, in which aerial warning barrage ball...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Belarusian National Technical University
2018-07-01
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| Series: | Izvestiâ Vysših Učebnyh Zavedenij i Ènergetičeskih ob Edinennij SNG. Ènergetika |
| Subjects: | |
| Online Access: | https://energy.bntu.by/jour/article/view/1244 |
| _version_ | 1797879741817028608 |
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| author | I. I. Sergey Y. V. Bladyko |
| author_facet | I. I. Sergey Y. V. Bladyko |
| author_sort | I. I. Sergey |
| collection | DOAJ |
| description | Aerial barrage balls serve for marking high-voltage wires in order to visually warn pilots of civil and military aviation about the presence of overhead lines. The present article deals with the mechanical calculation of flexible overhead wires of overhead lines, in which aerial warning barrage balls are installed. The wire is considered as a homogeneous flexible thread having the outline of a parabola and a chain line. The load from the aerial barrage balls must not be substituted with a distributed one by simple division of the total load into the span length, since it can cause incorrect results. The formulas for determining the sag are given for a different number of aerial barrage balls as a function of their number and the coefficient of concentrated forces. The acceptable accuracy of mechanical calculation is demonstrated when using the model of wire in the form of a parabola adopted in the design practice, provided that the components of concentrated forces are correctly determined. The equation of state is recorded, taking into account the weight and wind loads on the wire, as well as load coefficients in two planes, depending on the number of barrage balls. The performed calculations demonstrate an acceptable accuracy of the determination of the stress at various loadings of the span. For more accurate calculation of mechanical stresses and sag arrows, a vector-parametric method for calculating the flexible wires of overhead lines is suggested, where the calculated model of wires in the form of a flexible elastic thread is put taking into account of the spatial arrangement of all structural elements. The results of mechanical calculation according to the program that had been developed and to the existing methods for a different number of aerial barrier balls moved along the span are presented. |
| first_indexed | 2024-04-10T02:53:16Z |
| format | Article |
| id | doaj.art-7e5bb55ee6bf484ba121df1932eefae9 |
| institution | Directory Open Access Journal |
| issn | 1029-7448 2414-0341 |
| language | Russian |
| last_indexed | 2024-04-10T02:53:16Z |
| publishDate | 2018-07-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Izvestiâ Vysših Učebnyh Zavedenij i Ènergetičeskih ob Edinennij SNG. Ènergetika |
| spelling | doaj.art-7e5bb55ee6bf484ba121df1932eefae92023-03-13T07:41:51ZrusBelarusian National Technical UniversityIzvestiâ Vysših Učebnyh Zavedenij i Ènergetičeskih ob Edinennij SNG. Ènergetika1029-74482414-03412018-07-0161429930910.21122/1029-7448-2018-61-4-299-3091195Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage BallsI. I. Sergey0Y. V. Bladyko1Белорусский национальный технический университетБелорусский национальный технический университетAerial barrage balls serve for marking high-voltage wires in order to visually warn pilots of civil and military aviation about the presence of overhead lines. The present article deals with the mechanical calculation of flexible overhead wires of overhead lines, in which aerial warning barrage balls are installed. The wire is considered as a homogeneous flexible thread having the outline of a parabola and a chain line. The load from the aerial barrage balls must not be substituted with a distributed one by simple division of the total load into the span length, since it can cause incorrect results. The formulas for determining the sag are given for a different number of aerial barrage balls as a function of their number and the coefficient of concentrated forces. The acceptable accuracy of mechanical calculation is demonstrated when using the model of wire in the form of a parabola adopted in the design practice, provided that the components of concentrated forces are correctly determined. The equation of state is recorded, taking into account the weight and wind loads on the wire, as well as load coefficients in two planes, depending on the number of barrage balls. The performed calculations demonstrate an acceptable accuracy of the determination of the stress at various loadings of the span. For more accurate calculation of mechanical stresses and sag arrows, a vector-parametric method for calculating the flexible wires of overhead lines is suggested, where the calculated model of wires in the form of a flexible elastic thread is put taking into account of the spatial arrangement of all structural elements. The results of mechanical calculation according to the program that had been developed and to the existing methods for a different number of aerial barrier balls moved along the span are presented.https://energy.bntu.by/jour/article/view/1244стрела провесатяжениегибкая нитьцепная линияпараболауравнение состоянияпролетэквивалентный проводкоэффициент нагрузки |
| spellingShingle | I. I. Sergey Y. V. Bladyko Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls Izvestiâ Vysših Učebnyh Zavedenij i Ènergetičeskih ob Edinennij SNG. Ènergetika стрела провеса тяжение гибкая нить цепная линия парабола уравнение состояния пролет эквивалентный провод коэффициент нагрузки |
| title | Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls |
| title_full | Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls |
| title_fullStr | Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls |
| title_full_unstemmed | Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls |
| title_short | Mechanical Calculation of Flexible Wires of Overhead Lines with Barrage Balls |
| title_sort | mechanical calculation of flexible wires of overhead lines with barrage balls |
| topic | стрела провеса тяжение гибкая нить цепная линия парабола уравнение состояния пролет эквивалентный провод коэффициент нагрузки |
| url | https://energy.bntu.by/jour/article/view/1244 |
| work_keys_str_mv | AT iisergey mechanicalcalculationofflexiblewiresofoverheadlineswithbarrageballs AT yvbladyko mechanicalcalculationofflexiblewiresofoverheadlineswithbarrageballs |