Presentation on theme: "T-Craft—What, Why & How? Dr. Alfred Skolnick and Mr. Robert A. Wilson"— Presentation transcript:
1 T-Craft—What, Why & How? Dr. Alfred Skolnick and Mr. Robert A. Wilson Presentation toSNAME T & R Advanced Ships & Craft PanelandInternational Hydrofoil SocietyJune 12, 2012MaterialsHydrodynamics
2 SES-100B Mission Readiness Inspection A Little Nostalgia A Few Of Us Had Still Hoped For Another Ride On a Game Changing ConceptSES-100B Mission Readiness InspectionJune 27, 1972
3 How the T-Craft INP Program Got Started Naval Studies Board Report’sClosing RemarksOffice of Naval Research’sInnovative Naval Prototype ProgramInnovative Naval Prototypes explore high 6.2 and 6.3 technologies that can dramatically change the way naval forces fight.OBJECTIVE2000 – 2500nm25 – 250nmISBSea BaseONR BAASea Base Enablers - The Transformable CraftTo achieve Operational Maneuver From The Sea, large capital investments in major new capabilities probably would be necessary, including: A rugged, large-capacity, high speed landing craft, designed to interface efficiently with amphibious assault ships, logistics ships, and logistics units ashore.
4 T-Craft Candidate Program Plan CompletionContract AwardsPhase I: Concept Refinement*Phase I Tech. Eval ONR DoI/PEO Ships DecisionTechnology Transition OpportunitiesFY07FY08FY13FY09FY10FY11FY12FY14Phase II: Technology DevelopmentPhase III: System Development, Demonstration, and DeploymentFY06Phase II Tech. Eval ONR DoI/PEO Ships Decision(* Interim Tasking For Concept Refinement to restore Phase II Contracts Alignment)Phase IIdentification of technologiesCompetitive prototype designsTechnology risk assessmentDevelopment of Phase II plan9 month period of performance*T-Craft as a project was set up as a competition between companies or consortiums of companies. The project was announced to industry in the form of a Broad Agency Announcement.Phase I: $2 Million contract (per team) to develop a concept and preliminary designs for a prototype T-CraftPhase II: $8-10 Million contract (per team) to create detailed designs for a prototype T-CraftPhase III: $150 Million contract to build and test the prototype T-CraftPhase IIConcept down selectTechnology developmentT-Craft contract designModel testing24 month period of performancePhase IIIFinal design submittalsPrototype-demonstrator construction options open4
5 T-Craft Vision and Impact Vision: T-Craft can enable embarked forces to project power ashore without reliance on ports and airfields in the objective area.Improved PortImpact: T-Craft provides the amphibious capability, cargo capacity, and speed that has wide applicability across the full range of military operations.Austere PortNo Port55
6 T-Craft Concept Evolution — Step 1 Desired Capabilities & Design AttributesLarge Cargo Area- Catamaran- Trimaran- Air Cushion Vehicle- Surface Effect ShipHigh Speed & Acceptable Motions- Long Slender Hulls- ACV Cushion & Bow & Stern Seals- Minimized Hull Wetted Area- Waterjet Propulsion- Ride Control SystemUmoe Mandal’s ConceptOperating in its High-Speed SES Mode
7 T-Craft Concept Evolution — Step 2 Desired Capabilities & Design AttributesMotions Control& Position Station-Keeping- Active Ride Control Systems- Dynamic Positioning Systems- Motions Control Sensors & Actuation- Waterjets & Other Lateral Force GeneratorsCargo Transfer from the Sea Base- Deployable Ramp Systems- Relatively Stable Platforms- Motion Compensating Cranes- Vertical Access to Cargo deck from AboveTextron Marine & Land System’s ConceptOperating in Various Cargo Transfer Modes
8 T-Craft Concept Evolution — Step 3 Desired Capabilities & Design AttributesDeliver Cargo Feet-Dry- Deployable & Retractable ACV Side Skirts- Deployable Ramp System- Air Propulsion & Propulsor SystemAlion Science & Technology’s ConceptOperating in the ACV Mode
9 T-Craft Merges Three Unique Ship Concepts Catamaran ConceptT- is for TransformableACV ConceptSES Concept9
10 T-Craft Program Accomplishments Demonstrator Concept Feasibility BAA Threshold Desired CapabilitiesCargo Payload Weight 300 ltCargo Payload Area ,500 sq. ft.Un-Refueled Rangeno cargo ,500 nmwith cargo nmSpeed thru SS knotsSpeed thru SS knotsBeach Slope Climbing %Alion Science & TechnologyCargo Payload Area 7,500 sq.ft.Speed SS knotsTextron Marine & Land SystemsUmoe MandalCargo Payload Wt 352 ltCargo Payload Area 10,043 sq.ft.Unrefueled Range 3,210 nmBeach Slope Climbing 2.8%All Contractor T-Craft Demonstrator Designs Met or Exceeded the BAA Desired Capabilities
11 T-Craft Program Accomplishments Advancing Technologies & Training Our Next-Generation Of Naval Engineers
12 T-Craft Technology Thrusts Changing SES and ACV Art to Science Fluid Dynamics2-Body Motions Predictions- Provide model test data for V&V- Recommend motions prediction codes- Examine the effectiveness of ride control and dynamic controls technologies for enhancing ship motions and station-keepingCFD Solutions to:- 3-Dimensional cushion pressure contours in the cushion region- Impact of 3-D contours on waterjet performanceVirginia Tech, University of MichiganGeorge Mason Univ., T-Craft Contractors
13 T-Craft Technology Thrusts Changing SES and ACV Art to Science Advance State-of-the-Artin SES model testingTechnical ThrustsProvide an extensive and available model test data-base for V&V with analytical predictionsEvaluate sidehull / waterjet inlet interaction in calm water and wavesDetermine minimum power condition, (heave and trim), accounting for waterjet air ingestionTextron Model in Carriage 3, May 2012
14 T-Craft Technology Thrusts Changing SES and ACV Art to Science PropulsionLittoral/Surf Zone Hydrodynamics- Develop a probability-based design and analysis methodology for SES-waterjet propulsion systems- Advance the fundamental understanding of, and predictabilities for, the transient hydroelastic response of SES-waterjet propulsion systems- Surf Zone Dynamics — Observed Offshore conditions, assumed bathymetric wave transformations, surf zone- Fluid kinematics near the surf zone are non-linear- Involve error based probability analysesUS Naval Academy, University of HawaiiUniversity of Michigan
15 T-Craft Technology Thrusts Changing SES and ACV Art to Science Composite StructuresStructural Material Fabrication ComparisonsProviding structural design, construction and cost comparisons between large ship structures made from aluminum, composites and titanium- Dynamic modeling of sandwich beams- Vibration-based damage detection- Damage caused non-linear-physical basis for on-line health monitoring & diagnosisWayne State UniversityUniversity of New Orleans, T-Craft Contractors
16 T-Craft Technology Thrusts ONR Titanium T-Craft Mid-Ship Program Lead by Prof. Pingsha Dong, Northrop Grumman Endowed Chair in Shipbuilding & Engineering, University of New OrleansCan titanium ship structures be cost-effective?What are the enabling technologies to make it a reality?What are the implications on naval shipyards?What we have found so far?
17 T-Craft Technology Thrusts Titanium Mid-Ship Section Program Demonstrated Accomplishments Fit-For-Purpose based “ship hull grade” specification TitaniumWelded T’s, bent L’s and flat bar structural shapes vice standard extrusionsManufacturing and performance data developed for construction and structural performance for optimized Total Ownership CostFull box frame structure is currently being erected at TextronShip Grade Titanium Spec.Welding ProcessesExtensive Math Modeling
18 Platform Affordability T-Craft Technology Thrusts Does the Titanium T-Craft Mid‐Ship Section Help Meet ONR’s Total Ownership Cost Focus-Area Objectives?Platform AffordabilityTitanium suitability for fabrication of ship hullsEconomic benefitsConstruction efficiencyPositive operational impactLifecycle and Sustainment CostCorrosion resistant & good fatigue properties
19 Concluding Thoughts●The T-Craft concept provides capabilities never before available in a sea to shore connector.●Since the U.S. Navy has chosen not to build a demonstrator at this time, it may be appropriate for others in the world community to sponsor and build a point-design prototype meeting the humanitarian aid mission●Surely, sufficient recent national emergencies and world crises have occurred where a T-Craft could have brought rapid help and relief
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