کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
286983 509527 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spontaneous rotation in a driven mechanical system
ترجمه فارسی عنوان
چرخش خود به خودی در یک سیستم مکانیکی رانده شده
کلمات کلیدی
نوسانگر محرک رزونانس پارامتریک، تجزیه دوبختی، برداشت انرژی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

We show that a mass free to circulate around a shaken pivot point exhibits resonance-like effects and large amplitude dynamics even though there is no natural frequency in the system, simply through driving under geometrical constraint. We find that synchronization between force and mass occurs over a wide range of forcing amplitudes and frequencies, even when the forcing axis is dynamically, and randomly, changed. Above a critical driving amplitude the mass will spontaneously rotate, with a fractal boundary dividing clockwise and anti-clockwise rotations. We show that this has significant implications for energy harvesting, with large output power over a wide frequency range. We examine also the effect of driving symmetry on the resultant dynamics, and show that if the shaking is circular the motion becomes constrained, whereas for anharmonic rectilinear shaking the dynamics may become chaotic, with the system mimicking that of the kicked rotor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 371, 9 June 2016, Pages 295–304
نویسندگان
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