000004634 001__ 4634
000004634 005__ 20141119144540.0
000004634 04107 $$aeng
000004634 046__ $$k2002-06-02
000004634 100__ $$aVinogradov, Oleg
000004634 24500 $$aON THE ERROR CONTROL BY DAMPING IN IMPACT PROBLEMS IN GRANULAR MECHANICS

000004634 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004634 260__ $$bColumbia University in the City of New York
000004634 506__ $$arestricted
000004634 520__ $$2eng$$aA central impact of two balls having nonlinear stiffness is investigated numerically in order to find the accumulated error as a function of the time step. The error is presented as the energy conservation violation at the moment of break up and it has an appearance of kinetic energy added to the system during the impact. A quasi-viscous nonlinear force to compensate for the increase in the latter is introduced and it is shown that by finding the proper magnitude of this force the time step can be increased almost two-fold without violating the energy and momentum conservation laws at the moment of break up. This result can be used in multi-ball collisions to increase the computational efficiency of simulations.

000004634 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004634 653__ $$aballs, collision, error control, simulations

000004634 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004634 720__ $$aVinogradov, Oleg
000004634 8560_ $$ffischerc@itam.cas.cz
000004634 8564_ $$s224219$$uhttps://invenio.itam.cas.cz/record/4634/files/093.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004634 962__ $$r4594
000004634 980__ $$aPAPER