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._1CV)-NNTNo.13492PINITE ELEMERT STRESS KNALYSIS FORCOMPONENT ADVANCED TECHNOLOGY TEST BED (CATTB)NAY 1991'TICjMELECTEOCT 2 4 IbV._-:.;--*.-Samir Khourdajir.."U.S.ByAPPROVED FOR PUBLIC RELEASEDISTRIBUTIONArmy Tank-Automotive CommandATTN: AMSTA-TDSWarren, MI 48397-500023SLIN9185U.S. ARMY TANK-AUTOMOTIVE COMMANDRESEARCH, DEVELOPMENT & ENGINEERING CENTERWarren, Michigan 48397-5000VUnclassifiedSECURITY CLASSIFICATrN OF THIS PAGEREPORT DOCUMENTATION PAGEForm ApprovedOMB No. 0704.0188Date Jun30, 1986__Expla. REPORT SECURITY CLASSIFICATIONlb. RESTRICTIVE MARKINGS2a.

SECURITY CLASSIFICATION AUTHORITY3. DISTM1IBUTION/AVAILABILITY OF REPORT_Unclassified_DDIING-Approved for Public ReleaseDistribution is UnlimitedSHEUL.1.PERFORMING ORGANIZATION REPORT NUMBER(S)6a. NAME OF PERFORMING ORGANIZATION5. MONITORiNG ORGANIZATION REPORT NUMBER(S)6b. OFFICE SYMBOL7a. NAME OF MONITORING ORGANIZATION(If applicable)U.S. Army Tank-AutomotiveCommandI AMSTA-TDS6c. ADDRESS (City, State, and ZIPCode)Warren,MI7b.

ADDRESS (City, State, and ZIP Code)48397-5000J8a. NAME OF FUNDING/SPONSORINGORGANIZATION8b. OFFICE SYMBOL(If applicable)9. PROCUREMENT INSTRUMENT IDENTIFICA1ION NUMBER8c. ADDRESS (City, State, and ZIP Code)10. SOURCE OF FUNDING NUMBERSPROGRAMPROJECTTASKELEMENT NO.NO.NO.WORK UNITACCESSION NO.11. TITLE (Include Security Classification)Finite Element Stress Analysis for Component Advanced Technology Test BedTracked Vehicle (CATTB) (UNCLASSIFIED)12.

PERSONAL AUTKOR(S)- -- - -Khourdaji, Samir13a. TYPE OF REPORTFinal____14. DATE OF REPORT ,Year, &onth, Dy)13b. TIME COVEREDa-a--ORO_TO__.IS. PAGE COUNT_a_le16. SUPPLEMENTARY NOTATION17COSATI CODESFIELDGROUP18. SUBJECT TERMS (Continue on reverse if necessary .nd identify by tolck number)Stress Analysis,SUB-GROUP .Mass Properties, Dynamic Anplysisbull, Bulkhead, Road Load, Fri/ Load.

7,_-'Turret,19. 4STRACT (Continue on reverse if necessary and identify by block numbor)This program was initiated to study the effect of the new lightweightgun configuration on the turret and hull; to determine the physical andride properties of CATTB; and to ensure that the stresses in various CATTBcomponents under gun firing and terrain loads are within safe limits.Road testing will be conducted after the prototype is built to verifyanalysis results.-Inp odnbOin blacit a%)r1~fl'1.c~ntjo r20. DISTRIBUTION/AVAILABILITY OF ABSTRACT[3 UNCLASSIFIED/UNLIMITEDE SAME AS RPT.22a. NAME OF RESPONSIBLE :NDIVIDUALSamir KhourdaiDD FORM1473,84 MAR.wl,ElDTIC USERS21.

ABSTRACT SECURITY CLASSIFICATIONag____ ____22b. TELEPHONE (Include Area Code) 22c. OFFICE SYMBOL(313) 574-587583 APR edition may be used until exhausted.All other editions are obsoleteI5TA-riSECURITY CLASSIFICATION OF THIS PAGEircassifiedNOTICESThis report is not to be construed as an official Department of the Armyposition.Mention of any trade names or manufacturers in this report shall not beconstrued as an official endorsement or approval of such products or companiesby the U.S. Government.Destroy this report wheh it is no longer needed.originator.Do not return it to theTABLE OF CONTENTSPAGESECTION1Summary12Introduction23Discussion34Results44.1Solid Modeling44.1.1Tuiret Solid Model44.1.2Turret Mass Properties44.1.3Hull Solid Model54.1.4Hull Mass Properties54.2IStatic Finite Element Analysis234.2.1Turret Finite Element Model234.2.2Turret Applied Load234.2.3Turret Analysis (Turret Independent)244.2.3.1IRM Analysis Results4.2.3.2NISA Analysis Results4.3.4Turret Analysis (Turret as part of Chassis) 244.2.4.1IRM Results4.2.4.2.

NISA Results4.2.5Trunnion Model404.2.6Trunnion Applied Load4042.7Trunnion Analysis Results40 ionForAvailability CodesDistISpecial4.2.8Turret and Hull Casting474.2.9Casting Analysis Results4741.2.9.1Gun Firing at 0 degrees Horizontal474.2.9.2.

Gun Firing at 90 degrees Horizontal474.2.10Hull Model584.2.11Hull Applied Load584.2.12Hull Analysis Results58f4.L.12.1 Gun Firing at 0 degrees Horizontal4.2.12.2 Gun Firing at 90 degrees Horizontal4.2.13Hull Modification(reduction of opening in middle bulkhead)594.2.14Hull Analysis Results4.2.15Hull Modification (add top plate to casting) 594.2.16Hull Analysis Results4.2.17Hull Modification(reduction of rear bulkhead height)594.2.18Hull Analysis Results594.2.19Sponsons, Skirts and Outriggers864.3Dynamic Analysis1054.3.1DADS Model1054.3.2DADS Results1064.3.2.1Terrain Effects1064.3.2.2Firing Load Effects1074.4Dynamic Finite Element Analysis1534.4.1Dynamic Effects of Terrain Forces1534.4.2Dynamic Effects of Firing Forces1545.Conclusions1676.Recommendations168ABCDDistributionAppendixTurret Mass PropertiesHull Mass PropertiesTur-ret Support ReactionsDADS Model FileListivLIST OFILLUSTRATIONSFigureTitlePage1Turret Geometry112Turret Geometry123Turret Geometry134Turret Solid Model145Turret Solid Model156Turret Solid Model167Turret Solid Model178Turret Solid Model189Hull Solid Model1910Hull Solid Model2011Hull-Solid Model2112Suspension Solid Model2213CATTB Turret with Conventional Trunnion2514Stresses in CATTB Turret (Conventional Trunnion)2615Deflections in CATT(Conventional Trunnion)2716CATTB Turret (New Trunnion)2817CATTB Turret FEM Model2918CATTB Turret (Casting)3019IRM Stress Results (Turret Independant)3120TPM Rtrects Reslt(ror~---3221IRM Stress Results (Turret Independant)3322IRM Deflection Results (TurretIndependant)34VPageFigureTitle23NISA Stress Results (Turret Independant)3524NISA Deflection Results (Turret Independant)3625NISA Stress Results (Turret as part of Chassis)3726NISA Deflection Results(Turret as part of Chassin)29Trunnion F M Model4230Trunnion Stress Results (Firing Load)4331Trunnion Stress Results (Firing Load)4432Trunnion Stress Results (Pretension Load)4533Trunnion Deflection Results (Firing Load)4634Stresses in Turret and Hull casting (Top View)gun firing at 004835Stresses in Turret and Hull casting (Bottom View)gun firing at 004936Stresses in Turret and Hull casting (Front View)gun firing at 0°5037Stresses in Turret and Hull castingat ci(Trunnion Area) gun firing5138Stresses in Turret and Hull casting(Trunnion Area) gun firing at 005239Vertical Deformations in Turret and Hull castinggun firing at 005340Stresses in Turret and Hull casting gun firingat 90"5441Stresses in Turret and Hull casting gun firingat 9005542Lateral Deflection in Turret and Hull casting gunfiring at 9056viFigureTitlePage43Stresses in Turret and Hull casting(Trunnion Area) gun firing at 9005744CATTB Hull FEM Model6045CATTB Hull Geometry Model6146CATTB Chassis FEM Model (Turret innormal position)6247CATTB Chassis FEM Model (Turret innormal position)634.8Stress in CATTB Chas'sis (gun firing innormal position)6449GATTB Chassis FEM Model kY":ret rotated 90° )6550Stresses in CATTB Chassis (gun firing at 900RW are fixed)26651Stresses in CATTB Chassis (gun firing at 9 0 - 7RW are fixed)6752Deflections in CATTB Chassis (gun firing at900 - 7 RW are fixed)6853Deformed shape of CATTB Chassis (gun firing at900 - 7 RW are fixed)6954CATTB Hull FEM Model (Modification 1)7055Stresses in Modified (i)CATTB Hull (gun firingat 900 - 2 RW are fixed)7156Stresses in Modified (1)CATTB Hull (gun firingat 90o- 7 RW are fixed)7257Deflection In Modified (1)CATTB Hull (gun firingat 900 - 2 RW are fixed)7358Deflection in Modified (1)CATTB Hull (gun firing,,at 90c-, 7 iW are fixed)7459Stresses in Modified (2)CATTB Hull (gun ftringat 904 - 7 RW are fixed)7560Deflectiotis in Modified (2)CATTB Hull (gun firing90"- 7 PW are fixed)76vii--t~-flmFigureTitlePage61Stresses ir Modified (3)CATTB Hull (gun firingat 900 - 7 RW are fixed)7762Stresses in MOdified (3)CATTB Hull (gun firing78at 900-7 RW are fixed)63Stresses in Modified (3)CATTB Hull (gun firtng7965Deflections in Modified (3)CATTB Hull (gun firingab 900 - 7 RW are fixed)8166Deflection in Modified (3)CATTB Hull (gun firing82at 9067-7 RW are fixed)Shear Stress in Modified (3) CATTB Hull83(gun firing at 90O - 7 RW are fixed)68Deformed shape for CATTB Chassis (gun firingat 90- 7 RW are fixed)8469Deformed shape for CATTB Chassis (gun firing85at normal position)70Left Sponson and Skirt FEM Model8971Streqs in Sponson and Skirt (1 G Lateral)9072Deflection in Sponson and Skirt (1 G Lateral)9173Stress in Sponson and Skirt (CombinedAcceleration)9274Lateral Deflection in Sponson and Skirt(Combined Acceleration)Vertical Deflection in Sponson and Skirt(Combined Acceleration)9376Deformed shape for Sponson and Skirt(Combined Accelprtiton)9577Left Sponson and Skirt FEM Model (ReinforcingStrut added at first outrigger)9675viii94FigureTitlePage78Left Sponson and Skirt FEM Model (ReinforcingStrut added at first outrigger)9779Stresses in Reinforced Sponson and Skirt ( 1 GLateral)9880Lateral Deflection in Reinforced Sponson andSkirt ( 1 G Lateral)9981Stress in Reinforced Sponson and Skirt (CombinedAcceleration)10082Vertical Deflection in Reinforced Sponson andSkirt (Combined Acceleration)10183Lateral Deflection in Reinforced Sponson andSkirt (Combined Acceleration)10284Deformed shape for Reinforced Sponson and Skirt(Combined Acceleration)10385Forces in outriggers and struc10486CATTB Geometry - Roadwheels positions relativeto spocket10887CATTB Geometry - Roadwheels positions relativeto C.G10988CATTB Geometry - Roadwheels positions relativeto C.G11089CATTB Geometry - Suspension11290CATTB Geometry - Track and Suspension'11391CATTB Geometry - Suspension Stiffness Curve11492CATTB Geometry - Suspension Damping Curve11593CATTB Geometry - DADS Suspension Curve11694CATTB Geometry - DADS Damping Curve11795CATTB Geometry - DADS Impulse Curve11896CATTB Geometry - DADS ABG4 Terrain Curve11997CATTB Geometry - DADS Custom Terrain Curve12098CATTB Roll and Pitch Angle12199Vertical Acceleration at Chassis C.G and firstroadwheel122100Vertical Forces in roadwheels 1, 4, and 7124101Vertical Forces in roadwheels 2, 3, 5, and 6128104Maximum Forces in roadwheels LI, 4, and 7(case 1)134105Maximum Forces in roadwheels L2, 3, 5, and 6(case 1)135106Maximum Forces in roadwheels RI, 4, and 7136(case 1)107Maximum Forces in roadwheels R2, 3, 5, and 6137(case 1)108Maximum Forces in roadwheels Li, 4, and 7(case 2)138109Maximum Forces in roadwheels L2, 3, 5, 6139(case 2)110Maximum Forces in roadwheels Ri, 4, and 7(case 2)140111Maximum Forces in roadwheels R2, 3, 5, and 6(case 2)141112Fore113Pitch displacement during firing114Fore-Aft gun velocity during firing144115Fore-Aft gun acceleration during firing145116Chassis Acceleration during firing-Aft gun displacement during firing14214314611(Roadwheels reactions due to firing force147118Firing force roadwheels reactions (1,4, ad 7)148119Firing force roadwheels reactions (2,3,5, and 6)149120Fore - Aft displacement for LW gun and 120 mm gun150121Pitch displacement for LW gun and 120 mm gun151122Fore - Aft Acceleration for LW gun and 120 mm gun152123CATTB Stress Analysis for static firing loadin first roadwheel155124CATTB roadwheels reactions under static firingload156125CATTB Stresses due to 0.16 in vertical movement157126CATTB Stresses for dynamic firing load158127CATTB Stresses for dynamic firing load159128CATTB Stresses for firing load and terrain load(case 1)160129nATTB Stresses for firing load and terrain load(case 1)161130CATTB Stresses for firing load and terrain load(case 2)162131CATTB Stresses for firing load and terrain load(case 2)163xiaa4xiiLIST OF TABLES1Weight and C.G location for CATTB turret components62Mass properties for CATTB turret components aboutaxis passing through their C.G's73Mass properties of CATTB components about axispassing through turret center of rotation84Mass properties for CATTB hull105CATTB Geometry - Mass propertiesill6CATTB EIGEN value-analysis results - frequency1647CATTB EIGEN value analysis results - reactionforces1658CATTB EIGEN value analysis results - nodal stresses1663xdiixivPREFACEThis report illustrates the process necessary to make structuralanalysis and design of tracked vehicles a systematic procedurein which state-of-the art Etructu-al analysis, design andsimulation are fully utilized.