SUMMARY Case nr: 3 Damper 248*32, Flywheel 1.2kgm2... 2

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1 Issued by (Dep. name, loc. tel.): Torsional Vibration Calculation (TVC) Date issued: Mikael Björkmon Z Approved by (Dep. name, loc. tel.: Date approved Peter Olsson Z Ordered by (Dep. name, loc. tel.): Status: Jakob Ursby Z1 3 Approved TVC Id: Engine: Power (kw): Speed (rpm): Pages: 6281 D5A-TA Short description: D5A-TA, STAMFORD UC274D Flywheel end: Coupling: Front end: Coupling: Marine gearbox: Marine gearbox: Shaft: Shaft: Consumer: Consumer: STAMFORD UC274D Distribution: Dep. name location Dep. name location Important! Computer results and recommendations provided by AB Volvo Penta are valid only if input data are correct. AB Volvo Penta carries no responsibility for input data originating from other than Volvo Penta products. Therefore, please check input data for this calculation carefully. SUMMARY Case nr: 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm The following results were obtained: CASE: 3 LIMIT === Crankshaft nom. vibr. stress [MPa] 41 * Generator shaft nom. vibr. stress [MPa] 19 * Crankshaft forw end vibratory torque [Nm] 600 * Crankshaft flywh end vibratory torque [Nm] 2350 * Crankshaft damper heat load [kw/m 2 ] 1.9 * ==== * Calculated values are below adequate limits CONCLUSION: Case 3: No problems are foreseen from a torsional vibration point of view.

2 Torsional Vibration Calculation (TVC) 2(7) Case nr: 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm2 AB VOLVO PENTA TVC nr: 3723 Case nr: 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm2 T O R S I O N A L V I B R A T I O N C A L C U L A T I O N HEADER... : D5A TA, STAMFORD UC274D CALCULATION NUMBER... : 3723 INPUT FILE... : H:\DATA\tvc\indatafiler\tvc3723_3.dat COMPUTER INFORMATION... : APLver Windows OUR REF... : Peter Olsson ORDERER... : Johan Burgren ENGINE TYPE... : D5A TA UNITS IN FRONT OF ENGINE.. : None UNITS BEHIND FLYWHEEL...: STAMFORD UC274D Important! Comments: No problems are foreseen from a torsional vibration point of view... + COMPUTER RESULTS AND RECOMMENDATIONS PROVIDED BY AB VOLVO PENTA + + ARE VALID ONLY IF INPUT DATA ARE CORRECT. AB VOLVO PENTA CARRIES NO RESPONSIBILITY FOR INPUT DATA ORIGINATING FROM OTHER THAN + + VOLVO PENTA PRODUCTS. THEREFORE, PLEASE CHECK INPUT DATA FOR THIS CALCULATION CAREFULLY Important! Sign:PO... ********************************************************************** Engine Data ********************************************************************** CYLINDER DIAMETER...[mm]: STROKE (2 OR 4)...[-]: 4 COMPRESSION RATIO...[-]: LENGTH OF STROKE...[mm]: LENGTH OF CONNECTING ROD...[mm]: RECIPROCATING MASS...[kg]: 2.77 HARMONIC COMPONENTS...[-]: HK93 CYLINDER MASS NUMBER...[-]: FIRING ANGLE...[deg]:

3 Torsional Vibration Calculation (TVC) 3(7) AB VOLVO PENTA TVC nr: 3723 Case nr: 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm2 ***************************************************************** Data of Shaft System ***************************************************************** MASS DESCRIPTION MASSMOMENT STIFFNESS GEAR ----DAMPING ON MASSES DAMPING IN SHAFTS--- --SHAFT DIAMETER-- NR OF INERTIA RATIO COEFF MAGNIFIER COEFF MAGNIFIER OUTSIDE INSIDE [KGM2] [NM/RAD] [-] [NMS/RAD] [-] [NMS/RAD] [-] [M] [M] 1 HUB+PULLEY CYLINDER CYLINDER CYLINDER CYLINDER FLYWHEEL FLEXPLATE FAN ROTOR EXCITER DAMPERRING N O T E: Branched Shaft System, Connection Point: 11->1

4 Torsional Vibration Calculation (TVC) 4(7) TVC 3723 ******************* MODE NO. 1******************* CASE 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm2 NATURAL FREQUENCY: HZ CYCLES/MIN. MASS MASS RELATIVE AMPLITUDE PLOT NUMBER NAME AMPLITUDE 1 HUB+PULLEY I CYLINDER I CYLINDER I CYLINDER I CYLINDER I+++ 6 FLYWHEEL I 7 FLEXPLATE I 8 FAN I 9 ROTOR I 10 EXCITER I 11 DAMPERRING I ORDER VECTOR SUM NCRIT (R/S) (R/M) TVC 3723 ******************* MODE NO. 2******************* CASE 3 100kW@1800rpm, Damper 248*32, Flywheel 1.2kgm2 NATURAL FREQUENCY: HZ CYCLES/MIN. MASS MASS RELATIVE AMPLITUDE PLOT NUMBER NAME AMPLITUDE 1 HUB+PULLEY I CYLINDER I CYLINDER I CYLINDER I+ 5 CYLINDER I 6 FLYWHEEL I 7 FLEXPLATE I 8 FAN I 9 ROTOR I EXCITER I DAMPERRING I ORDER VECTOR SUM NCRIT (R/S) (R/M)

5 Torsional Vibration Calculation (TVC) 5(7) TVC nr:3723 Case:3 Damper 248*32, Flywheel 1.2kgm2 Engine Power [kw] Crankshaft Indicated Stress A mplitude [MPa] CYLINDER3 5 CYLINDER4 9 ROTOR

6 Torsional Vibration Calculation (TVC) 6(7) Torque Amplitude [Nm] CYLINDER1 6 FLYWHEEL Torque Amplitude [Nm] FAN 9 ROTOR

7 Torsional Vibration Calculation (TVC) 7(7) Power Loss [W] DAMPERRING