دانلود مقاله ISI انگلیسی شماره 54442
عنوان فارسی مقاله

روش های مهندسی برای برآورد واکنش رساناهای خط انتقال در بادهای دان برست

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
54442 2015 13 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Engineering method for estimating the reactions of transmission line conductors under downburst winds
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Engineering Structures, Volume 99, 15 September 2015, Pages 272–284

کلمات کلیدی
خطوط انتقال؛ رسانای؛ باد با شدت بالا ؛ دان برست - فرم بسته؛
پیش نمایش مقاله
پیش نمایش مقاله روش های مهندسی برای برآورد واکنش رساناهای خط انتقال در بادهای دان برست

چکیده انگلیسی

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.

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