Dynamic Damping - Comparison of different concepts from the point of view of their physical nature and effects on civil engineering structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU140106" target="_blank" >RIV/00216305:26110/18:PU140106 - isvavai.cz</a>

Výsledek na webu

<a href="https://dml.cz/bitstream/handle/10338.dmlcz/703074/PANM_19-2018-1_15.pdf" target="_blank" >https://dml.cz/bitstream/handle/10338.dmlcz/703074/PANM_19-2018-1_15.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21136/panm.2018.12" target="_blank" >10.21136/panm.2018.12</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic Damping - Comparison of different concepts from the point of view of their physical nature and effects on civil engineering structures

Popis výsledku v původním jazyce

Sources of dynamic damping may be various. Mostly, the damping is implemented into calculations in a form of introduction of damping forces, as a product of the velocity vector and the damping matrix in an equation of motion. In practice, the damping matrix is usually assumed to be a linear combination of the mass matrix and the stiffness matrix (so called Rayleigh’s damping). This kind of damping primarily assumes the external environment viscosity as the source of damping, even though the part of Rayleigh's damping with the stiffness matrix implies the internal damping of the material. Explicitly, the internal viscosity of the material is respected using the appropriate material models. The relation between the Rayleigh damping and the Kelvin-Voight viscosity is shown in the paper. Dynamic damping occurs even when using non-elastic materials, where the unloading takes place in a different path from the loading and thus it leads to dissipation during loading cycles. The paper deals with the comparison of different types of damping of the oscillation of a building structure. The main aim of the paper is to recommend to apply the viscous material model instead of the obsolete and physically unjustified Rayleigh damping in the nonlinear dynamic time analysis of structures.

Název v anglickém jazyce

Dynamic Damping - Comparison of different concepts from the point of view of their physical nature and effects on civil engineering structures

Popis výsledku anglicky

Sources of dynamic damping may be various. Mostly, the damping is implemented into calculations in a form of introduction of damping forces, as a product of the velocity vector and the damping matrix in an equation of motion. In practice, the damping matrix is usually assumed to be a linear combination of the mass matrix and the stiffness matrix (so called Rayleigh’s damping). This kind of damping primarily assumes the external environment viscosity as the source of damping, even though the part of Rayleigh's damping with the stiffness matrix implies the internal damping of the material. Explicitly, the internal viscosity of the material is respected using the appropriate material models. The relation between the Rayleigh damping and the Kelvin-Voight viscosity is shown in the paper. Dynamic damping occurs even when using non-elastic materials, where the unloading takes place in a different path from the loading and thus it leads to dissipation during loading cycles. The paper deals with the comparison of different types of damping of the oscillation of a building structure. The main aim of the paper is to recommend to apply the viscous material model instead of the obsolete and physically unjustified Rayleigh damping in the nonlinear dynamic time analysis of structures.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Programs and Algorithms of Numerical Mathematics Proceedings of Seminar

ISBN

978-80-85823-69-1

ISSN

—

e-ISSN

—

Počet stran výsledku

12

Strana od-do

107-118

Název nakladatele

Neuveden

Místo vydání

Hejnice

Místo konání akce

Praha

Datum konání akce

24. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000576737400012