000012663 001__ 12663
000012663 005__ 20160920162636.0
000012663 04107 $$aeng
000012663 046__ $$k2016-09-05
000012663 100__ $$aVanvinckenroye, H.
000012663 24500 $$aStochastic rotational stability of tower cranes under gusty winds

000012663 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012663 260__ $$bTaylor and Francis Group, London, UK
000012663 506__ $$arestricted
000012663 520__ $$2eng$$aThis work aims to study the rotational stability of a tower crane left free to rotate. Indeed, in case of important wind velocities, small oscillations can increase and build up into autorotations due to autoparametric excitation of the structure. Many references in the literature describe the limit between oscillation and autorotation for simple cases like the deterministic pendulum and evidence the importance of the Hamiltonian of a system on its stability. In this context the susceptibility of the structure to this dynamical instability is characterized by the average time necessary to reach a given energy barrier departing from an initial energy level. This first passage time is the solution of the Pontryagin equation and is approached by an asymptotic expansion. First- and second-order terms are calculated as well as the boundary layer solution providing a correction when the initial energy is close to the barrier level.

000012663 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012663 653__ $$a

000012663 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012663 720__ $$aVanvinckenroye, H.$$iDenoël, V.
000012663 8560_ $$ffischerc@itam.cas.cz
000012663 8564_ $$s677434$$uhttps://invenio.itam.cas.cz/record/12663/files/111.pdf$$yOriginal version of the author's contribution as presented on CD, 111.pdf.
000012663 962__ $$r12552
000012663 980__ $$aPAPER