master's thesis
MODELLING OF DAMPING IN SMALL WIND TURBINES

Sanda Lučić (2016)
Josip Juraj Strossmayer University of Osijek
Faculty of Civil Engineering
Department for Technical Mechanics
Chair of Technical Mechanics
Metadata
TitleMODELIRANJE UTJECAJA PRIGUŠENJA DJELOVANJA MALIH VJETROTURBINA U GRADSKIM SREDINAMA
AuthorSanda Lučić
Mentor(s)Ivica Guljaš (thesis advisor)
Abstract
Vibracije koje nastaju kao posljedica rada strojeva, prometa i drugih izvora bogatih frekvencijom mogu uzrokovati deformacije nosivih i nenosivih konstrukcijskih elemenata te pojavu pukotina na njima, ali vrlo često uzrokuju i probleme koji nastaju zbog zamora materijala. Također, ovakve vibracije mogu stvoriti osjećaj nelagode ljudima koji se nalaze unutar konstrukcije. S druge strane, vjetroturbine se vrlo često mogu pronaći u urbanim sredinama okružene zgradama ili postavljene na krovove istih. Iako vjetroturbine potiču proizvodnu „zelene“ energije, one također proizvode vibracije koje mogu negativno utjecati i na konstrukciju i na živa bića. Ovaj rad nastoji istražiti utjecaj vibracija koje nastaju uslijed rada male vjetroturbine postavljene na krov zgrade u urbanoj sredini, te modeliranjem različitih tipova prigušivača umanjiti navedene utjecaje u što većoj mjeri. Podloga za ovo istraživanje je sustav tlo-konstrukcija-vjetroturbina koji je modeliran korištenjem računalnih programa Ashes 1.2 i SAP2000. Konstrukcije modelirane u ovom radu su tipične za područje grada Osijeka, a vjetroturbina koja je modelirana je Bergey Excel 1kW, koja je dostupna na području Republike Hrvatske. U radu se nastojalo prigušiti vibracije principom koji je najprikladniji kod malih vjetroturbina – izolacijom. U skladu s ovom težnjom, uspoređen je utjecaj elastomernog uređaja i uređaja s oprugama. Također, opisan je postupak modeliranja TMD uređaja. Analiza rezultata provedena je za karakteristične točke plošnih elemenata na različitim etažama konstrukcije, a vrijednosti očitane u njima su zatim uspoređene sa propisanim dopuštenim vrijednostima.
Keywordswind turbines small wind turbines vibrations urban area damping devices elastomeric device spring device TMD Ashes 1.2 SAP2000
Parallel title (English)MODELLING OF DAMPING IN SMALL WIND TURBINES
Committee MembersAleksandar Jurić (committee chairperson)
Ivica Guljaš (committee member)
Davorin Penava (committee member)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Civil Engineering
Lower level organizational unitsDepartment for Technical Mechanics
Chair of Technical Mechanics
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineTECHNICAL SCIENCES
Civil Engineering
Supporting Structures
Study programme typeuniversity
Study levelgraduate
Study programmeUniversity graduate study in civil engineering; specializations in: Hydraulic engineering, Supporting structures, Construction management and technology, Transportation engineering
Study specializationSupporting structures
Academic title abbreviationmag.ing.aedif.
Genremaster's thesis
Language Croatian
Defense date2016-11-24
Parallel abstract (English)
Vibrations induced by machinery, traffic and other stochastic frequency-rich sources may cause deformations and cracks on both structural and non-structural elements but also fatigue related problems. Moreover, vibrations in buildings may cause discomfort for people and animals. On the other hand, wind turbines may often be found in urban areas surrounded by buildings or placed a top of a building. Although the turbines support green engineering and production of clean energy, they also produce vibrations that may negatively influence the behaviour of both structures and living beings. This paper aims to investigate effects of vibrations generated by small-scale wind turbines placed on buildings in urban areas and also to reduce those vibrations by modelling and installing different kinds of damping devices. A platform for this research is a soil-structure-wind turbine system which was modelled by using software Ashes 1.2 and SAP2000. Structures selected for this case study are typical buildings that can be found in city of Osijek, and modelled wind turbine is Bergey Excel 1kW, which is available on the market of Republic of Croatia. The aim of this research was to reduce vibrations by using the most convenient principle of damping for small wind turbines – isolation. According to that, the influence of elastomeric and spring device were compared. Additionally, the process of TMD device modelling is presented in this paper. The analysis of the results was carried out for different characteristic points on shell elements on different floors. Those values are compared to values given by different norms and standards.
Parallel keywords (Croatian)vjetroturbine male vjetroturbine vibracije urbano područje prigušivači elastomerni uređaj uređaj s oprugama TMD Ashes 1.2 SAP2000
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:133:989965
CommitterVesna Zobundžija