WP1 Supercritical composite drive line
- Material analysis - regarding perfomances, reliability, safety procurement of whole mechanical sub-systems
- Detailed static &fatigue analysis of all parts in accordance with TM methodologies
- interfaces characterisation to consolidate vibratory behavior and manufacturing feasability
- Analytical and numerical vibratory analysis of shafts + couplings
- Global Vibratory behavior: state of the art in mechanical vibration of rotor, key parameters have been defined. Single shaft numerical model with flanges has been correlated with theoretical model to further develop a model for the whole drive line
- Design of several architectures and trade off (subcritical shaft, reference reduction…)
- Interface parts definition with aircraft and gearbox
- Space allocation validations and DMU update
- analysis of reused sub-systems coming from TM and design adaptation to be compliant with these ones
- detailed definition from DMU to drawings of items, design update according to interface or test rig limitations
- protections analysis, fixations and assembling to reduce weight balance
- Interface drawings with additional notes according to TM requirements
- detailed nomenclature with description of specification and processes
- Study of curvic definition
WP2 Damping system passive study
- State of the art, pros and cons analysis
- Architecture assessment in accordance with integration constraints
- Alternatives experimental definition for passive damper characterization
- 3D mock-up, detailed drawings
- Prototypes manufacturing
Semi-active study is achieved for damper and still ongoing for bearing implementation
- State of the art, pros and cons analysis
- Proposal for frequencies issues
- Implementation of damping bushes to modify properties of ICDS
WP3 Full drive Line Qualification Tests
- Specimens Definition, configuration and instrumentation
- Statics and fatigue tests definition, implementation, update according test rig limitation
- Implementation of thermal boxes
- Test rig update to allow higher torsional angles to assembly new shafts interface
- Vibratory test program definition
WP4 SHM system
- SHM Specification and Work Plan (SHMSWP)
- SHM architecture in accordance requirements
- Industrial analysis with offer to implement on NGCTR
WP5 Composite drive line manufacturing
- Manufacturing of simplified flanges, friction bush and composite shafts
- Manufacturing of toolings and adaptor with curvic teeths
- Assembling on representative shafts for fatigue test
- NDT analysis, definition of control methodology, criteria
- Balancing and painting of composite shafts
- Manufacturing of test rig damper including piezoelectrical sensors for characterization
- damper manufacturing and surface treatment
WP6 Project Management
monitoring project, inputs and parameters. Monthly meeting with all stakeholders
Management of recovery planning and unforseen events in accordance with remaining milestone and project ending.
WP7 Communication, dissemination, exploitation
Plan have been updated
Overview of the results:
+ AS4-8552 composite is now well known by partners
+ Items 25% lighter than metallic assembly
+ Items 25% less expensive than metallic solution
+ Frequencies positioning can be 60% higher than metallic definition
+ No proof of instability with composite shafts
+ Torsional performances at least equal to metallic technologies
- Some requirements not fully demonstrated
Exploitation and dissemination:
The project’s results will be used by the partners through innovative products, services or consultancy activities. Though, the exploitation of the project’s results is of importance. The project, allowed the identification of market opportunities and contributes to the assessment of future projects to improve the technology. The project allowed to improve expertise of the consortium in the development of transmission shaft for rotorcrafts, both in theoretical and experimental approach in several fileds.
Communication and dissemination activities allowed to increase our exposure as potential innovative partners and to identify new research project for the development of composite transmission shaft for helicopter.
