bike fea me272 professor jose granda by zhiyu gao peter nguyen
TRANSCRIPT
BIKE FEA
ME272Professor Jose Granda
ByZhiyu Gao
Peter Nguyen
Objective
1. Solid model from solidworks Exporting from Solidworks as *.IGS and *.STEP
2. Import to Nastran 4D When importing in as *.IGS into the Nastran 4D, the
assembly was treated as one part, therefore we could not individually set and learn independent parts reaction.
When importing in as *.STEP into Nastran 4D, the assembly was treated as an assembly with many parts associated with it, therefore, we were able to assign different criteria as well as learning each individual interaction with each other.
3. FEA analysis Static FEA Dynamic FEA
Solidworks Model Frame
Frame in SolidWorks
Solidworks Model Steering
Handle bar in SolidWorks
Solidworks Model Wheel
Wheel in SolidWorks
Solidworks Model Assembly
Complete Bike assembly in SolidWorks
Nastran 4D FEA on Wheels
Static FEA on wheels
Max Value=3.9e+5Pa
The Max Value is at the Rearwheel
Nastran 4D FEA on Frame
Static FEA on frameMax Value=1.32e+8Pa
The Max Value is at the Axis of the Pedal
Nastran 4D FEA on Seat
Static FEA on the seat
Max Value=1.31e+7Pa
Nastan 4D FEA on Ground
Static FEA on ground
Max Value=7.14e+6Pa
The Max Value is at the middle part of
ground, but we do not have clues why that
happens.
Nastran 4D FEA on Whole Bike
Static FEA on whole Bike
Max Value=4.37e+7Pa
The Max Value is at the Axis of the Pedal
Dynamic FEA on Bike
Dynamic FEA on Wheels
Conclusion
1. Nastran 4D is a good software, however there is no control of mesh on FEA, this would inhibits the study on certain locations where tighter and smaller meshes are required for accurately predicting the FEA analysis especially the curve surface areas.
Conclusion
2. When export the file from Solidworks to Nastran 4D, we need to save the file as *.STEP, so that we can treat the model as parts but not a whole solid.
3. The FEA on the ground shows the max value is on the middle part of the ground, but not under the wheels. We can not explain why that happens.
Conclusion
4. The max value that shows in the FEA of the whole bike is not the same as the max value in the FEA of parts. Why?
5. When do the dynamic FEA of the bike, it shows that the curve of the wheel suffers larger force than the parts where are supported.