کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
266181 504345 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Engineering method for estimating the reactions of transmission line conductors under downburst winds
ترجمه فارسی عنوان
روش مهندسی برای برآورد واکنش های خطوط انتقال خطوط تحت باد دمیده شده
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• A closed form solution for the reactions of transmission line conductors is derived.
• The solution allows to evaluate the reactions under downburst loads.
• The derivation is conducted using a simplified multi-spanned conductor–insulator system.
• The solution is derived for downburst case with arbitrary size and location.
• It is also derived for a critical downburst case previously recommended for line design.
• Accuracy of the derived solution is verified for both downburst cases.
• The proposed solution represents a practical and useful tool for practitioner engineers.

In this study, a closed form solution to calculate the reactions of transmission line conductors subjected to downburst loads is derived. The derivation is conducted using a simplified multi-spanned conductor–insulator system, where the insulators to the right and to the left of the tower of interest are modeled using a combination of roller supports and linear springs. The considered system allows for the interaction between the spans without the need of solving a set of non-linear equations to avoid the complexity. The closed form solution is derived to be applicable for downbursts with arbitrary size and location relative to the line. The solution is then focused on a critical downburst case that is previously recommended for the line design. Accuracy of the derived solution is assessed under both downbursts with arbitrary size and location and downbursts corresponding to the critical case. The assessment is carried out by comparing the conductor reactions obtained using the proposed solution with those from the Finite Element Analyses (FEAs). It is found that the predicted reactions by the proposed solution are in a very good agreement with those from the FEA in both the transverse and the longitudinal directions. For example, the highest differences for the critical case are found equal to 2% and 8% for the reactions in the transverse and the longitudinal directions, respectively. This indicates that the solution is reasonably accurate given the complexity of both the downburst wind field and the structure behavior of the conductor system. The proposed solution represents a practical and useful tool for practitioner engineers involved in the design of transmission lines, particularly under downburst winds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 99, 15 September 2015, Pages 272–284
نویسندگان
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