000001929 001__ 1929
000001929 005__ 20141118153449.0
000001929 04107 $$acze
000001929 046__ $$k2011-05-09
000001929 100__ $$aNáprstek, J.
000001929 24500 $$aDYNAMICS OF A VIBRATION DAMPER WORKING ON A PRINCIPLE OF A HEAVY BALL ROLLING INSIDE A SPHERICAL DISH
000001929 24630 $$n17.$$pEngineering Mechanics 2011
000001929 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Brno
000001929 506__ $$arestricted
000001929 520__ $$2eng$$aWind excited vibrations of slender structures such as towers, masts or certain types of bridges can be reduced using passive or active vibration absorbers. If there is available only a limited vertical space to install such a device, a ball type of absorber can be recommended. In general, it is a semispherical horizontal dish in which a ball of a smaller diameter is rolling. Ratio of both diameters, mass of the rolling ball, quality of contact surfaces and other parameters should correspond with characteristics of the structure. The ball absorber is modeled as a holonomous system. Using Lagrange equations of the second type, governing non-linear differential system is carried out. The solution procedure combines analytical and numerical processes. As the main tool for dynamic stability investigation the 2nd Lyapunov method is used. The function and effectiveness of the absorber identical with those installed at the existing TV towers was examined in the laboratory. The response spectrum demonstrates a strongly non-linear character of the absorber.
000001929 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000001929 653__ $$aVibration ball absorber, dynamic stability, non-linear vibration.
000001929 7112_ $$aEngineering Mechanics 2011$$cSvratka (CZ)$$d2011-05-09 / 2011-05-12$$gEM2011
000001929 720__ $$aNáprstek, J.$$iPirner, M.$$iFischer, C.
000001929 8560_ $$ffischerc@itam.cas.cz
000001929 8564_ $$s934926$$uhttps://invenio.itam.cas.cz/record/1929/files/p091.pdf$$yOriginal version of the author's contribution as presented on book, page 403.
000001929 962__ $$r1835
000001929 980__ $$aPAPER