Modal analysis of tall slender structures using software GMAST

0392428 - ÚTAM 2014 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Hračov, Stanislav - Pospíšil, Stanislav - Brůna, Tomáš
Modal analysis of tall slender structures using software GMAST.
Engineering Mechanics 2013. Prague: Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v. v. i., 2013 - (Zolotarev, I.), s. 197-203. ISBN 978-80-87012-47-5. ISSN 1805-8256.
[Engineering Mechanics 2013 /19./. Svratka (CZ), 13.05.2013-16.05.2013]
Grant CEP: GA MPO(CZ) FR-TI3/654; GA ČR(CZ) GP13-41574P
Institucionální podpora: RVO:68378297
Klíčová slova: modal analysis * tall slender structures * guyed masts * towers
Kód oboru RIV: JM - Inženýrské stavitelství

The paper is concerned with a verification of modal properties of tall slender structures computed by recently developed software GMAST. Software GMAST determines eigen-frequencies, eigen-modes and corresponding modal quantities of stacks, towers, guyed masts and similar civil engineering structures using slope-deflection method. A numerical model is based on an idealization of the structure as a continuous 2D beam with continuously distributed parameters on elastic supports. Shaft of structure is divided into sections which could be considered as prismatic i.e. with constant unit mass, bending stiffness and static axial force. The effect of guy ropes is introduced in a form of elastic supports with a frequency dependent stiffness. The applicability of the software in praxis is presented on an example of existing structures, for which the numerically and experimentally identified modal properties are compared.
Trvalý link: http://hdl.handle.net/11104/0223706