航行试验大纲.docx
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航行试验大纲.docx
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航行试验大纲
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ISEATRIALOFHULLPART
I-1GENERAL
(1)Allteststobecarriedoutwhenallsystemsandancillarieshavebeencompletedandmooringtestshavebeendone.
(2)Ingeneral,zigzag-maneuvertest,turningcircletest,inertiatest,crashstopaheadtest,vibrationtest,noisemeasurementandwilliamsonturntestshouldbecarriedoutonlyforfirstvessel,andtheabovementionedtestsshouldbeomittedforsecondandsubsequentships(pending).
I-2TestConditionandPlace
Thevesselistobeballastedtotheballastconditionandfollowingtrialstobeperformed.BeforeProgressiveSpeedTrial,thedrafts(foredraftis7.18m,aftdraftis9.18m(displacementabout80800m3))shouldbeverifiedbytheremotedraftreadingonboard,whichiscalibratedandconfirmedbyownerduringtheIncliningExperiment.
Theprogressivespeedtrialtobecarriedoutincalmsea,withsmallwindforce.IfthewindforceexceedsBeaufortscale3,windandshallowwatercorrectionshouldbeappliedaccordingtoBSRAmethod.
I-3ProgressiveSpeedTrial(SeeTableH-1)
(1)Theprogressivespeedtrialistobecarriedoutunderthefollowingfiveworkingconditions.
SER.NO.
M/EOUTPUT
BHP
M/ESPEED
RUNS
1
50%max.cont.output
8430kW
~76r/min
2
2
75%max.cont.output
12645kW
~86r/min
2
3
85%max.cont.output(NCR)
14331kW
~91r/min
2
4
Max.cont.output(MCR)
16860kW
~95r/min
2
5
2920kW
~49r/min
1
(2)Beforespeedtrialtheloadadjustmentaccordingtoloadingrequirements,draftgaugeandmeasurementofseawaterspecificgravitytobecarriedout.
(3)Thedepthofwaterinseatrialareatobemorethan80m.Exceptcondition5,Eachspeedtrialistoconsistoftwoconsecutiverunsalongandagainstthetideoverthesamecourseandthespeed,mainengineratingandrevolutionshallbeobtainedasthemeanvalueofthetwoconsecutiverunsateachconditionasshowninthefollowingformula:
V=(V1+V2)/2,P=(P1+P2)/2,N=(N1+N2)/2
Speedmeasureistobecarriedout1nauticalmiledistanceforeachrun.Beforearrivingatthespeed-measuringareathevesselshallrunasufficientdistanceofabt.3nauticalmilesinorderthatthemainenginehasrunatstableoutputsbeforethespeedmeasurementcommences.Duringspeedmeasuringwithintestsectioncoursedeviationshallbenotmorethan2degrees,steeringangleshallbenotmorethan±5degrees.
(4)Speed-measuringmethod
ThetrialspeedistobemeasuredbyDGPS.Theoutputshaftpowerandrevolutionofmainenginetobemeasuredbytorsionmeter.Theinstrumentswhichusedinthetestshouldhavethecertificationofverificationbeforespeedtrials.
(5)Measurementrecord
a.Testtimeandwaterdepthofeverytrip.
b.Windvelocityanddirection,weathercondition.
c.Ship’sspeed,revolutions,powerofM/E(rpm)andindicatorhorsepowerofeverytrip.
(6)Ship’sspeedcalculation
Ship’sspeedatdesigndraft(16.5m)tobeobtainedfromthefollowingformula:
VTD=VTB*VMD/VMB
intheformula:
VTD–actualspeedatdesigndraft.
VTB–actualspeedatballastdraft.
VMD–modeltestspeedatdesigndraftin
VMB–modeltestspeedatballastdraft.
I-4InertiaTest,CrashStopAsternTestandCrashStopAheadTest
(1)InertiaTest(OnlyH1008)(SeeTableH-2)
Whenshipisgoingfullaheadatnormalrpm(86.2r/min),giveanordertostopmainengine.Whenship’sspeedreducestothespeedabt.5knthetestisfinished.Duringthetestthecourseheadingshouldbekeptbychangingtherudderangle.MeasureandrecordthedistanceandtimefromtheorderofstopM/Etotheship’sspeedreduceto5kn.
(2)Crashstopasterntest(SeeTableH-3)
Whenshipisgoingfullaheadatnormalrpm(86.2r/min),giveanordertomakemainenginerunastern(63r/min).Whenship’sspeedreducestothespeedabt.0knthetestisfinished.Duringthetestkeeprudderangleat0degree.Measureandrecordthedistanceandtimefromcommandfullasterntotheship’sspeedreduceto0kn.
(3)Crashstopaheadtest(OnlyH1008)(SeeTableH-4)
Whenshipisgoingasternwith63r/minofmainengine,giveanordertomakemainenginerunahead(86.2r/min).Whenship’sspeedreducestothespeedabt.0kn,thetestisfinished.Duringthetestkeeprudderangleat0degree.Measureandrecordthedistanceandtimefromcommandfullaheadtotheship’sspeedreducetoabout0kn.
I-5TurningCircleTest(OnlyH1008)(SeeTableH-5)
(1)Testmethod
Whenthesteeringgearisintheconditionofdoublepumpworking,thetestshouldbedoneatfullspeed(91r/min),harborfullspeed(68r/min)andharborhalfspeed(55r/min)respectively:
a.Therudderangleisturnedtohardstarboard(35degree)andhelduntiltheship’sheadinganglechangesto540degree,thetestisfinished.
b.Resumethestraightcourseuntilthespeedrecovery.
c.Therudderangleisturnedtohardportside(35degree)andhelduntiltheship’sheadinganglechangesto540degree,thetestisfinished.
d.Resumethestraightcourseuntilthespeedrecovery.
(2)Measurementrecordthetransferdistance,advancedistance,turningdiameterandmaximumheelingangle.
I-6ZigzagManeuveringTest(SeeTableH-6)
(1)Testmethod
Whenthevesselisrunningahead(91r/min),thetestistobecarriedoutinaccordancewithfollowingsteps:
a.Therudderangleisturnedfromitszeropositionto10starboardandhelduntilthecourseofthevesselchangestoanangleof10starboardtotheoriginalcourse;
b.Therudderangleisturnedfrom10starboardto10portandhelduntilthecourseofthevesselchangestoanangleof10porttooriginalcourse;
c.Therudderangleisturnedfrom10portto10starboardandhelduntilthecourseofthevesselchangestoanangleof10starboardtooriginalcourse:
d.Therudderangleisturnedfrom10starboardtoitszeropositionandhelduntilthevesselrunsinoriginalcourse.
(2)Measurementrecord
a.M/Erevolution.
b.Initialvesselspeed.
c.Timeofeverystageandcourseangle.
I-7CourseKeepingTest(SeeTableH-7)
Duringseatrail,checkthecoursestability:
(1)Keepthesteeringtillerunchangedwhilethevesselissailingfullahead(91r/min)withsteeringbyhand.RecordthereadingofGYROCOMPASSwiththeintervalof30seconds.Measurementwillbecontinuedfor3minutes,onetimeforfairandcountercurrentrespectively.
(2)Thevesselissailingfullahead(91r/min)andtobeensuredtokeepthecourse.Measurethetimesofsteeringforkeepingthecourseandthemax.Rudderangle.Measurementwillbecontinuedfor3minutes,onetimeforfairandcountercurrentrespectively.
I-8SteeringGearTest(SeeTableH-8)
(1)Mainengineiscontrolledinwheelhouse,andmaneuverhandletobeputinthepositionofaheadandfullspeed(91r/min).Steeringtesttobedoneinwheelhouse.OperatethehydraulicpumpNo.1orNo.2respectively,dothetestbyputtingtherudderanglefrom0to35starboard/from35starboardto35port/form35portto0/from0to35port/from35portto35starboard/from35starboardto0.Measureship’sheelingangle.Thetimerequiredtoputtherudderfrom35ofonesideto30ofanothersideshallnotexceed28second.
(2)Mainenginetobeputonthestatusofaheadandfullspeed,runningtwohydraulicpumps,testthecapabilityofputtingtherudderfrom0to35starboard/from35starboardto35port/form35portto35starboard/from35starboardto0.
Followingdatatoberecorded
a.Weather,seacondition.
b.Timerequiredforeachmovingrudder.
c.Maximumoilpressureinhydrauliccylinders
d.Maximumcurrentofmotor.
(3)Emergencysteeringgeartest
Totesttheemergencysteeringeffectivenessinsteeringgearroomwithship’srunningathalfspeed(M/Eabt76r/min)butnotlessthan7Kn.
Byturningthepumpcontrolhandlemaketherudderanglechangedfrom0-15starboard-15port-0onetime.Measurethetimeofsteeringfrom15starboardto15port.Itshouldnotexceed60second.
(4)Autopiloteffectivenesstest
Duringthemainengineendurancetest,dothetestwithNo.1&No2steeringsystemrespectively.
--NFU(manual)steering
--HAND(following)steering
--AUTO(automatic)steering
Setupaheadingcourse,navigatewithautopilot,andobservethekeepingcoursecapacitywithcourserecorder.Thendothetestofchangingheadingcourse.
I-9WindlassandAnchoringTest(SeeTableH-9)
(1)Ananchor-groundwithmorethan82.5meterdepthshallbeselectedunderacalmseaconditionandthebowintheupwind.
(2)Eachanchoristobeletgodowngraduallytothesurfaceofthewater.
(3)Fiveshotsofchainsofonesideanchoristobeletgodownfreely.Duringthisprocessmanuallybrake.Checkthereliabilityofthebrakesystem.
(4)Onesideanchoristobehoisted.Duringhoistingprocess,averagespeedofhoistinganchortobemeasuredandrecorded.(bymeasuringNo.2andNo.3shotofchain),Theaveragespeedisnotlessthan9m/min.Thenhoisttheanchoruptobellmouthwithwindlass.
(5)Anotheranchoristobetestedinthesamewayasabove.
(6)Datatoberecorded
Date&placeoftest,weather,waterdepth,actuallengthofchainunderwater,maximumoilpressureandmaximumworkingcurrentofelectricmotoretc.
(7)Twoanchorstobehoistedatthesametimewithoneshotofchainunderwater.
I-10Structruretest
No.
Item
Frame
Volume
Test
Requirement
Air
Water
1
F.P.T.(C)
299~321
4715.68
*
*
Overflow
2
A.P.T.(C)
-5~14
1303.57
*
*
Overflow
3
No.6Hold(al.)
131~160
22681.5
*
Full
(Remark:
Theitemsthathavenotfinishedinmooringstagewillbecompletedduringseatrail.)
I-11MeasurementofVibration(SeeTableH-10)
MeasuringofvibrationtobecarriedoutduringM/EEndura
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