tech seminar on wind turbines

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  • 7/21/2019 Tech Seminar on Wind turbines

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    Fatigue damage of

    mechanical componentin land based and

    oshore wind turbines

    SHARATH.B.N

    M.Tech. 2ndSemester

    BMS College of Engineering

    TECHNICAL SEINA!

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    Wind Turbines

    Lnd bsed

    !"#shore bsed

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    "ase designs for #oating witurbines

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    Abstrct

    Com$rison of ftigue dmge of gers nd berings bet%een

    &lobl nl'sis is crried out using ero#h'dro#ser(o#elstic co

    Lods re $$lied to the gerbo) modelled using Multi Bod' S*MBS+.

    ,tigue dmge is clculted bsed on SN#cur(e nd -lmgreh'$othesis under identicl %ind conditions.

    Results re com$red.

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    . &lobl nl'sis

    using ero#h'dro#ser(o#elstic code*S/M!#R/,LE0#Aero1'n+.

    2. ,

    nd$$bo)

    3. Multi Bod'Simultion model

    4. ,nout

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    Land based and spar wind turbinemodels $N!EL%

    Modelled using S/M!#R/,LE0#Aero1'n.

    S/M! 5 models the rigid bod' h'drod'nmics od the hull nbod' com$onents of the turbine.

    R/,LE0 5 ,inite element sol(er.

    Aero1'n 5 ,orces nd moments on bldes bsed on BldeElement6Momentum *BEM+ or &enerli7ed 1'nmic W8e *theories.

    The s$r %s modelled s rigid bod'.

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    &eneral characteristics

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    ' ( gearbo) model $N*(ITEC

    Consists of three stges 5 2 $lnetr' nd $r

    helicl gers.

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    "S model

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    Fatigue damage in gears

    &er tooth bending ftigue dmge b' -lmgren#M

    h'$othesis

    Nt is the number of stress c'cles in one hour

    9c nd m re SN cur(e $rmeters

    c re the Weibull sh$e nd scle $rmeters of stress rnge

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    The stress rnge is obtined b' Lod 1urtion

    1istribution *L11+ method.

    Stress rnge is function of both e)ternl lod:uctutions nd ger rottionl s$eed.

    Stress c'cle counting method for gers is di"eretht of other structurl com$onents.

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    Fatigue damage in bearings

    Bering life nd dmge clcultion is bsed onLundberg#-lmgren e;ution

    - is the d'nmic e;ui(lent rdil lod gi(en b' L is the bering life de

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    !esults

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    !esults the com$rison fctor for ftigue dmge bet%een the t%o

    turbines

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    E;ui(lent B is

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    Conclusions from the stud+

    /t is found tht the min bering crr'ing )il losustins higher dmge in s$r thn the lnd#bturbine.

    !ther gers nd berings encounter lo%er or e;

    dmges in s$r turbine %hen com$red %ith thbsed.

    The bering life is une;ul for u$%ind nd do%n$lnet berings in s$r %ind turbine similr to th

    bsed turbine.

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    Technical paper

    Amir Rse8hi [email protected] Erin E. Bch'ns8ib hen &oTorgeir Mon.

    ,tigue 1mge Com$rison of Mechnicl Com$in Lnd#

    Bsed nd S$r ,loting Wind Turbine -rocedi

    Engineering > 2>

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    THAN9 !D