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Benefits offered by GERB solutions
•Unrivalledvibration isolation
efficiency - up to 99%
•Reduced foundation size, which
resultsincost,timeandspace
savings
•Designedtoensuremaintenance
free, durable operation
•Reduced stress in machines,
whichleadstoan increased
operation life
•Easy levelling of the machine
wheneverrequired,evenafteryears
of operation
•No harm to the workshop or
building
•Seismic protection of machinery,
buildingsandothertallstructures
ThehistoryofGERBdatesbackto1908.
Thiswastheyearthatitsfounder,William
Gerb,becamefascinatedwiththeideaof
usingsteel springsinordertoprotect
workareasandsurroundingneighborhoods
frommachineryvibrations.Subsequently,
theinventionoftheViscodamper® com-
pletedthemostefficientvibrationcontrol
systems.
Sincethen,theGERBGroupofcompanies
hascontinuedtodevelopthisideaandit
hasseenussolvedynamicproblemsacross
manynewfieldsofapplication.
Today,bothmachineryandequipmentin
many power generationandmetal form-
ing plantsareinstalledonactive vibration
isolation systems.Theobjectivebehind
thisisnotonlytoreducevibrationsthat
aregeneratedbythemachines,butalsoto
reducethefoundationsizeandcost.
Sensitive production, measurement and
test equipment, and even entire buildings
require passive isolation systems inorder
toprotectagainstdisturbingvibrationsof
nearbymachines,trafficandseismicactivi-
ties.Bothactiveandpassiveisolationsys-
temspermitthestraightforwardrealignment
ofthefoundationincaseswherepoorsoil
conditionscausethefoundationtosettle.
Tuned Mass Dampers (TMDs) are a special
typeofvibrationprotectionfortallerstruc-
tures.Specifically,theyareusedtostabilize
andreducevibrationsofbridges,buildings,
stadiumsandothersystems.
At GERB, we are fully conscious that inno-
vationistheonlywaytosecurethefuture.
The vibration isolation of railway tracks
and the seismic protectionofsensitive
equipmentandbuildingsareamongjust
someofourexcitingnewerapplications.
GERB’sResearchandDevelopmentCenter,
whichislocatedinBerlin,Germany,regular-
lycollaborateswithhighlyregardedresearch
institutionsinGermanyandabroad.
GERB Activities:
Thedevelopment,manufactureandsupply
of custom designed solutions for vibra-
tion control.
Ifrequired:
–Measurement/identificationofvibration
andstructurebornenoiseissues
–Staticanddynamicstructuralanalysis
–Installationandadjustmentorsupervision
Applications of Vibration Control Systems
GERBiscertifiedaccordingto:
ISO9001,ISO14001,OHSAS18001,DINEN1090-01,
DINEN1090-02,ISO3834andotherstandards
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Metal Forming / Industrial Machinery
AnElasticallySupported SMSEUMUCOHASENCLEVERPress, Austria
TheSpringSupportedCATERPILLARGensets,
USA
VibrationIsolationofCentrifuges, Germany
FORGING HAMMERS
Forginghammersgenerateextreme dynamic forces whichhaveadetrimentaleffectonnearbyequipment, theoperatingpersonnelandevenonnearbyresidences. Inresponsetothisissue,GERB’sdirect spring support of forging hammers:
• Achieves a reduction in vibrations ofmorethan85%• Ensuresareductioninconstructiontimeandthe
cost ofthefoundation• Enables hammers to operate maintenance free forlongerperiodsoftime
• Eliminatesproblemsoffoundationsettlement andtilting of the hammer
GAS AND DIESEL GENSETS
Nowadays,thespringsupportofgasanddieselgensetsisastandardfoundationsolutioninmanycountries.
GERBelasticsupportsystemsprovideanefficiency of isolation that reaches up to 98%.Consequently,thishelpstoavoidthesettlement of the substruc-ture as well as damage to the machines in cases of earthquakes.Ourspringsupportsystemsareusedforalltypesofgensets,includingemergencygensets.
PRESSES
All types of presses - whether they are mechanical, hydraulicorscrewpresses-willcreate vibrations that will disturb the surrounding neighborhood.Theresultcanbedamagetothebuildingandothermachinesinstallednearby.
Throughouttheworld,GERBhassucceededin isolatingthelargestandmostcomplicatedpressesinaveryeffectivemanner.
CENTRIFUGES
Dynamic forcesofverticalandhorizontalcentrifugesinchemicalandotherindustriescaneffectively be reduced by suitable isolation systems that allow the installationofthemachinesonhigherbuildinglevels.
Our4pointisolationsystemhasreplacedthestandard
type3pointsupportingsystemsonagloballevel.
ASpringSupportedLascoForgingHammer,Germany
The Principle of DirectSpring
Support
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Power Plants / Damper Systems
PipeworkDampersforEarthquakeProtectionat a Power Plant, Hungary
SpringSupported Axial Fan,
TLT,Germany
SpringSupportedAxialFan,Howden,Germany
TURBINES AND CONDENSERS
Togetherwithleadingturbinemanufacturers,GERBhasdevelopedtheelasticsupportofturbineswithcapaci-tiesofupto1700MW.Ourcustomersarebenefittingfromthemanyadvantagesofferedbythisinnovation:
• Achieves vibration isolation ofmorethan98%• Straightforward adjustment and re-alignment• Creates additional space below the turbine• Integrates the turbine into the building structure• Protects the turbine against earthquake damage
Springsupportedcondensersenablethermalexpan-sionwithoutanyrestrictions.
FANS
ThankstotheGERBspringsupportoffans,heavy block foundations are no longer required.InsteadoftheneedforamassiveRC-block,thefanfounda-tion can either be eliminated or reduced to a small size slab.
The efficiency of vibration isolation of more than 95% willnotcauseanydisturbancetothesurroundingarea.Furthermore,thelowtotalweightofthespring supported fan protects from settlement of the sub-structure.
MILLS / CRUSHERS
Millsandcrushersofalltypes,especiallythoseinpowerplantsandthecementindustry,generateheavy random type dynamic forces that affect nearby boil-ers,controlinstrumentsandotherequipment. Springsupportnotonlyreducesmaintenancecostsasaresultoflesswearandtear,butalsoallowsforsmallerfoundationsthateliminatelayoutconstraint atthesite.
PIPEWORK DAMPERS
GERBpipeworkdampersareusedinpowerplants,chemicalplants,refineriesandoffshoreapplica- tionsacrosstheglobefortheprotectionofpipingsystems.GERBpipeworkdampersensure:
• Vibrations are reduced in all degrees of freedom• The development of high damping forces in
case of shock and operational loads• Vibrations are reduced withoutanydelay• GERB Pipework Dampers are maintenance free
TheSpringSupported LOESCHECoalMill,
Belgium
TheSpringSupported 900MWSiemensTurbine,
Germany
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Building Isolation / Trackbeds
ACommuterTrainona FloatingSlabTrackSystem, LosAngeles,USA
TRACKBED ISOLATION Alltrainsproducenoiseandvibrations,disturbingpeopleandsensitiveindustriesinmanycities.GERBoffersavariety of anti-vibration bearing systems, successfully reducing train induced vibrations and structure borne noise.
Nowadays,GERBFloatingSlabSystemsrepresenthighly effective and long term reliable vibration mitigation systemsthatarerecognizedbyexpertsallovertheworld.
BUILDINGS Attractivebuildingplotsfoundincentralandconvenientlocationsof moderncitiesoftencomewithonemajordisadvantage–vibrationsandstructurebornenoisecausedasaresultof:
– Metroandrailwaylines, – Heavytrucktraffic, – Machineryinneighboringindustrialfacilities Vibrations and ground-borne noise can be significantly reduced by elastic support systems for buildings. GERBspringelementsareinstalledbelowbuildings,inpocketsarrangedwithinbasementwalls,orontopofwallsandcolumnsabovegroundlevel.
Systemswithverticalnaturalfrequenciesaslowas 3to8Hertzprovideexcellentattenuationlevels.Theyaresuccessfullyinstalledintunnels,abovegroundandonelevatedrailtracksworldwide.Inparticular,theyareavailablefor
– Trams – Urbanmasstransitsystems – Freighttrains – Highspeedpassengertrains
Formoredetailspleasedonothesitatetocontactus.
GERBspringelementsaredesignedto take loads ranging from 10 to 300 metric tonsandevenhigher. GERBprovideselasticsupportsystemsnotonlyfor entire buildings, but also for floating floors and room-within-a-room structuresusingembedded“jackup”springelementsorsupportingspringunits.
Thevibrationandstructurebornenoiseisolationofconcert halls, TV studios, nightclubs, IT rooms, swimming pools and even helipad platforms are justaselectionofexamplesofprojectsthatGERBexecutesonadailybasis.
ASpringSupportedOfficeBuilding aboveRailTracks,
Paris, France
TheTrackbedIsolationofaHighSpeedLine, Cheonan,Korea
ASpringSupportedResidentialBuilding, Berlin, Germany
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Seismic Protection / Tuned Mass DampersTheRetrofitofaHospitalBuildingbyaTunedMassControlSystem,
Slobozia,RomaniaEARTHQUAKE PROTECTION OF MACHINERY, BUILDINGS AND OTHER STRUCTURES
Manycountrieshavetolivewiththeconstantthreat ofearthquakes.Inresponsetothis,GERBisofferingvisco-elastic devices to ensure the earthquake protection of heavy machinery and structures.Machines,equipmentandbuildingswithsuchdeviceshavebeenabletosurvivepowerfulearthquakesoverthe last years in many seismically prone areas of the world.
Withso-calledTuned Mass Control Systems, GERB hasbeenabletoeffectivelyprotectlargebridges,newandexistingsensitivebuildingssuchashospitalsandofficebuildings.
Forfurtherinformationpleasedonothesitatetocontactus.
TUNED MASS DAMPERS (TMDs)
Widespanstructureslikebridges,stairsandroofs,as well as tall, narrow structures such as chimneys, antennas,mastsandskyscrapers,canbeexcitedtovibratebywindforces,pedestrians,car or railway traffic and earthquakes.
GERB’sTMDsarespeciallydesignedtoreducethesevibrationsofheavystructuresandfortherequired application.
Consistingofspringorpendulumsystems, oscillatingmassesandViscodampers®, they are passive type dampers that feature the followingadvantages:
• Do not require an energy source• Simple in design and maintenance free• Highly effective and provide maximum
reduction of vibrations• Tunable on-site, even after years of
operation
TheMillenniumBridgewithTMD-Retrofit,London,UK
AHighRollerwithTMDsforProtectionfromWindForcedVibrations,LasVegas,USA
TheprotectionofaSkyscraperfromWindForcedVibrations,Doha,Qatar”6
Special Applications
RetrofitofaTurbineFoundationSystemata Power Plant, Germany
SHIPBUILDING AND OFFSHORE FACILITIES
Unquestionably,noiseandvibrationcontrolplaysasignificantroleinensuringsafetyandcomfortonshipsandoffshorefacilities.
SpecialspringelementsandTMDshavebeen developedbyGERBforelasticsupportandvibrationreductionofengines,powergenerators,compressorsandotheraggregatesonshipsandoffshorestruc-tures.
GERBproductsforshipandoffshoreapplicationsfeaturemanybenefits,including:
• Resistant to high and low ambient temperatures• Resistant to fire and corrosion• Non-aging and maintenance free• Easy to install
MICROSEISMIC
Impressively,itisnotonlydisastrousvibrationsbyearthquakes,trafficandindustrialoperationthatcanbereduced.
GERBalsoprovidesvibration control systems for buildings, machinery and equipment in the micro and nano process industries.
Extremely sensible machinery and equipment such as3D-measurementmachines,opticandelectronicmicroscopes,andITequipmentcan now be protect-ed from vibrations thanks to special spring elements and dampers.
GERBprovidesdesign,civilengineering,productsforisolation,installationandinspectionservicesthatcanbetailor-madeforyourspecificrequirements.
RESTORING AND UPDATING OF FOUNDATION SYSTEMS
More than one-third of all power plants throughout the world are aged over 30 years. Many of them operate machinery and equipment that needs to be updatedwithnewer,highercapacityturbogenerators,coalmills,boilerfeedpumpsandfans. Largemachinefoundationsinotherareasliketheautomobile,paperprinting,orchemicalindustrieshavealsofoundaneedforrestorationandretrofit. Forover50years,GERBhasupdatedmachinefoundationsformanyleadinggroupsinpowergeneratingandotherindustries.
GERB’s full service offer includes:
– Soilandfoundationassessment– Proposalsfornewmachinefoundationsystemswithfulldocumentation(i.e.staticanddynamicanalysis,generalarrangementandreinforcementdrawings,re-barlists)
– Supplyofelasticfoundationsystems(ifrequired)– Constructionsupervisionandstartupassistance
Foryourspecialrequirements,pleasedonothesitatetocontactus.
TheprotectionofaResearchCenterfromMicroseismicVibrations, Bucharest, Romania
AnOffshoreTowerwithTMD,NorthSea
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