Dynamic Characteristics of the Structure with Viscoelastic Dampers Combined with Inerters and Subjected to Temperature Changes
[ 1 ] Instytut Analizy Konstrukcji, Wydział Inżynierii Lądowej i Transportu, Politechnika Poznańska | [ 2 ] Instytut Konstrukcji Budowlanych, Wydział Budownictwa i Inżynierii Środowiska, Politechnika Poznańska | [ P ] pracownik
PL Charakterystyki dynamiczne konstrukcji z lepkosprężystymi tłumikami połączonymi z inerterami i poddanymi zmianom temperatury
2020
artykuł naukowy
angielski
- viscoelastic damper
- inerter
- temperature
- fractional derivative
- nonlinear eigenvalue problem
EN The purpose of the work is dynamic analysis of passive dampers used in structural systems to reduce excessive vibrations caused by wind or earthquakes. Special systems are considered that contain inerter, i.e. device using rotational inertia, in combination with a viscoelastic damper. The so-called fractional models of viscoelastic dampers describe their dynamic behavior in a wide frequency range using a small number of model parameters. To describe material behavior over a wider frequency range, the time-temperature superposition principle is used. The shifting factor is calculated from the well-known William-Landel-Ferry formula. This allows for determination of damper parameters at any temperature based on the parameters obtained at the reference temperature. Laplace transformation of the derived equations of motion leads to the non-linear eigenproblem, which could be solved using the continuation method. The influence of temperature on the dynamic characteristics of the system is examined.
2020222-1 - 2020222-10
Article Number: 2020222
CC BY (uznanie autorstwa)
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