SAMCEF MECANO FlexDyn: Market analysis

Transcription

1 SAMCEF MECANO FlexDyn: Market analysis Sebastien GOHY 1 - ASD Competence Center

2 SAMCEF Mecano Flexdyn: Market analysis SAMCEF Mecano: Reminder Mecano Structure Classical NL FEM Cf Abaqus, MSC Marc Mecano Motion: Kinematic Joints + Beams + SEs Cf MSC Adams, LMS Virtual Lab, Simpack Mecano FlexDyn: Mecano Structure + Mecano Motion Cf Nobody! This SWOT for Mecano FlexDyn only!! 2 - ASD Competence Center

3 Two different approaches on the market today: MBS approach: 3 STEPS: 1) MBS model to compute dynamic loads on joints 2) Transform dynamic loads into equivalent staic loads 3) Apply static loads to linear static FE model FEA approach : Include kinematic joints in FE model to compute everything at once ANSYS and Abaqus are also trying, but not actively promoting it 3 - ASD Competence Center

4 Two different approaches on the market today: MBS approach: MBS mostly made of: Rigid bodies + Mass and inertias + Equivalent stiffnesses in springs/bushings Flexibility can be included via SEs (limited number) FEA approach Each component can be either: Real FE model, potentially NL SE Rigid body No limit on the size of model 6 dof nodes Relative/Recursive variables 4 - ASD Competence Center

5 Two different approaches on the market today: MBS approach: FEA approach: Super Elements: - Require using another package (FEA based) Our Super Elements: -Are created in the same environment - No contact possible - No NL phenomena possible - Mid to high frequencies damped out - Can be created directly from parts (only operation required: choice of amounts of eigenmodes) - Not mandatory at all!!! 5 - ASD Competence Center

6 Two different approaches on the market today: MBS approach: FEA approach Corresponds to way most companies are organized (since there was no other tool available anyway) Needs to increase communication between «system» and «component» teams. Need to convince R&D team of the added value to start with (cf Toyota, GE ) 6 - ASD Competence Center

7 SAMCEF Mecano = FEA including MBS features! 15 years of experience in the field Kinematic joints is not the only feature to develop: Abaqus has no rigid bodies (they rigidify flexible meshes ) Time integration schemes are important Local nonlinearities (contact, material ) can be taken into account Matrix conditionning is also important (K struct >>> K kin) Contact with large displacements => matrix reprofiling Equation solvers developped for large FEM problems => 50kdof is peanuts. 7 - ASD Competence Center

8 SWOT: Results accuracy (see WTs, Toyota) Level details according to needs Parts concept «All in» software 8 - ASD Competence Center

9 SWOT: MBS codes emphasize on build in templates (Adams CAR ) We have only the generic environment to do the same, but not the models Build models in a clever way (or CPU time >>) MBS codes are more efficient when purely rigid models are used. For linear flexibility, we still need to see. 9 - ASD Competence Center

10 SWOT: Windturbines (see dedicated presentations) Automotive: vehicles and engines dynamics Aeronautics: high lift devices (see SONACA); jet engines Space: Large Payload Antennas Satellites MI: Robots Machine Tools (market ready?) 10 - ASD Competence Center

11 SWOT: Companies structures not always fitting ANSYS is developping similar tools DAFUL in SE Asia 11 - ASD Competence Center

12 Conclusions: Market positioning: SAMCEF Mecano Flexdyn is the tool to use to analyse flexible system where dynamic effects are important, for fatigue or position accuracy reasons. The targetted market is the one of MBS codes, where companies start to find out that flexibility matters! 12 - ASD Competence Center