کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
266315 504351 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical behavior of electrical hollow composite post insulators: Experimental and analytical study
ترجمه فارسی عنوان
رفتار مکانیکی مقاطع پست الکترونیکی کامپوزیتی توخالی: مطالعه تجربی و تحلیلی
کلمات کلیدی
مقره های پست الکتریکی، عایق کامپوزیت هسته ای توخالی، تست سیکل، آزمایش تجربی، مدل تحلیلی، رفتار پویا
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• An experimental study was conducted on a full-scale electrical hollow composite post insulator.
• The test series comprise, pull and cyclic quasi-static tests in addition to impact hammer tests.
• The static and dynamic mechanical behaviors of the insulator were investigated.
• An analytical model was derived to simulate the response of the intact and damaged post insulator.

Electrical post insulators are important components of electrical substations since any type of failure in such insulators leads to the breakdown of the local network. Although the electrical substations are often in service condition, any horizontal excitation due to the earthquake, or any extreme event, may cause lateral deformation and damage to the post insulators. Hollow composite post insulators, a new and evolving technology, have a very complex mechanical behavior due to their materials and connections. To date, the design of such post insulators has been based on the limited test results available in the literature. Most of experiments have been conducted on small-scale specimens focusing on the elastic response. This study presents a series of experiments conducted on a full-scale electrical hollow composite post insulator to investigate the static and dynamic mechanical behaviors, while a computational model is derived. The test series comprise, pull and cyclic quasi-static tests in addition to impact hammer tests, to assess the mechanical behavior of the insulators subjected to the lateral forces at different stages of damage. The key experimental results include the pre-peak force–displacement relationship, the cyclic response, the stiffness and strength deteriorations, and failure modes. The modal frequencies and the corresponding viscous damping ratios for the undamaged and damaged post insulator are calculated using the results of impact hammer tests. An analytical model is derived from the mechanical behavior to simulate the response of the un-damaged and damaged post insulator, and is verified by the test results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 93, 15 June 2015, Pages 129–141
نویسندگان
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