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Jointed AT Blade

Jointed AT Blade. Shu Ching Quek (Presenter) Baehmann Peggy Yerramalli Chandra Miebach Thomas Faidi Waseem General Electric Global Research Center. Logistics of Transporting Blades. $. Lower cost. miles. Jointed Blade. Typical blade length shipping cost. Increases transportability.

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Jointed AT Blade

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  1. Jointed AT Blade Shu Ching Quek (Presenter) Baehmann Peggy Yerramalli Chandra Miebach Thomas Faidi Waseem General Electric Global Research Center

  2. Logistics of Transporting Blades $ Lower cost miles Jointed Blade Typical blade length shipping cost Increases transportability • Key Benefits • Standardized joint design • Reduce transportation costs • Reduce escort and route limitations • Competitive feature

  3. Ongoing and Tested Concepts To Date LM, TU Delft, WMC Bolted / Bonded Weight Blade Freq Dynamic Response Root Moment Bolted / Bonded Bolted / Bonded Reliability Closer to root causes high torque / moment Increases fatigue risks Field Assembly / Maintenance Ease of assembly Space requirement Joint Type Torsional Stiffness Blade twist Tailor Blade design Limited Spar Cap Fab Enercon E-126 (7+ MW) Rotor diameter 126 m Bolted / Bonded

  4. Analysis and Downselection CTQs Extreme Loads @ Joint Section FE Structural Blade Model Applied to Output Loads obtained from GE Structural Group Blade Design Team Displacements Rotations Applied to FE 3D Solid Sub-Component Model of Joint Output Joint Component Stresses Compare to Respective Material Limits Jointed AT Blade Global-Local analysis performed to design and analyze blade joint region

  5. Testing and Validation of Subscale Joint Design

  6. In-Field Assembly Concepts

  7. Adhesive Selection • Adhesive requirements • Mechanical properties • Tensile strength & modulus • Shear strength & modulus • Peel strength • Fatigue performance • Process robustness • Surface preparation and conditions • Environmental conditions • Application via injection process • Detectable for in-line quality control Datasheet & design variables Application performance Ready for use in field assembly Development focus on process robustness and NDE development

  8. Quality Control Joint line Injection Tube adhesive flow path Video clip view window Ferrite adhesive real-time monitoring and a snap shot of the adhesive flow Ultrasound scanning system for post cure inspection and c-scan images Conventional post-cure inspection versus real-time monitoring technology

  9. Full Scale Validation on 2.5MW Platform • Strain gages for flap and twist • Accelerometers • Camera • On-tower test • On-ground testing for extreme and 20-year fatigue life

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