کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6753398 1430812 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and analytical study on vibration control effects of eddy-current tuned mass dampers under seismic excitations
ترجمه فارسی عنوان
تحلیلی آزمایشی و تحلیلی در مورد اثرات کنترل لرزش گیره های جرمی تنظیم شده در محدوده جرقه ای تحت تحریک های لرزه ای
کلمات کلیدی
در حال حاضر، کمپرسورهای توده ای، کنترل منفعل، تست جدول تکان دادن، روش تحلیلی، کنترل ساختاری،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Eddy-current tuned mass dampers (EC-TMDs) are non-contacting passive control devices and are developed on the basis of conventional tuned mass dampers. They comprise a solid mass, a stiffness element, and a damping element, wherein the damping mechanism originates from eddy currents. By relative motion between a non-magnetic conductive metal and a permanent magnet in a dynamic system, a time-varying magnetic field is induced in the conductor, thereby generating eddy currents. The eddy currents induce a magnetic field with opposite polarity, causing repulsive forces, i.e., damping forces. This technology can overcome the drawbacks of conventional tuned mass dampers, such as limited service life, deterioration of mechanical properties, and undesired additional stiffness. The experimental and analytical study of this system installed on a multi-degree-of-freedom structure is presented in this paper. A series of shaking table tests were conducted on a five-story steel-frame model with/without an EC-TMD to evaluate the effectiveness and performance of the EC-TMD in suppressing the vibration of the model under seismic excitations. The experimental results show that the EC-TMD can effectively reduce the displacement response, acceleration response, interstory drift ratio, and maximum strain of the columns under different earthquake excitations. Moreover, an analytical method was proposed on the basis of electromagnetic and structural dynamic theories. A comparison between the test and simulation results shows that the simulation method can be used to estimate the response of structures with an EC-TMD under earthquake excitations with acceptable accuracy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 421, 12 May 2018, Pages 153-165
نویسندگان
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