1. Sh/Coupling/Brg/Mis = Thin,Soft,Soft,angle. Fmax~219

2. Sh/Coupling/Brg/Mis = Thin,Soft,Soft,offset. Fmax~246

3. Sh/Coupling/Brg/Mis = Thin,Soft,Hard,angle. Fmax~224

4. Sh/Coupling/Brg/Mis = Thin,Soft,Hard,offset. Fmax~324

5. Sh/Coupling/Brg/Mis = Thin,hard,soft,angle. Fmax~256

6. Sh/Coupling/Brg/Mis = Thin,hard,soft,offset. Fmax~248

7. Sh/Coupling/Brg/Mis = Thin,hard,hard,angle. Fmax~263

8. Sh/Coupling/Brg/Mis = Thin,hard,hard,offset. Fmax~329

9. Sh/Coupling/Brg/Mis = Thick,soft,soft,angle. Fmax~1024

10. Sh/Coupling/Brg/Mis = Thick,soft,soft,offset. Fmax~863

11. Sh/Coupling/Brg/Mis = Thick,soft,hard,angle. Fmax~1137

12. Sh/Coupling/Brg/Mis = Thick,soft,hard,offset. Fmax~5960

13. Sh/Coupling/Brg/Mis = Thick,hard,soft,angle. Fmax~3157

14. Sh/Coupling/Brg/Mis = Thick,hard,soft,offset. Fmax~889

15. Sh/Coupling/Brg/Mis = Thick,hard,hard,angle. Fmax~4546

16. Sh/Coupling/Brg/Mis = Thick,hard,hard,offset. Fmax~7476

17. Assumptions Used
Each flex plane of coupling acts like an angular spring: Moment = Ka*Angle
Euler-Bernoullie Beam model neglecting shear
Neglect all dynamic effects

18. Comments Dynamic effects not considered
Motor and pump assumed symmetric. If not, then zero-shear at coupling does not hold. Angle seems more sensitive to deviation from symmetric.
For the combination hard coupling, soft bearing, offset created less force than angle (both thin and thick shaft)
Angle creates more bearing angle deviation than offset in most cases
Offset tends to hit the inboard bearing. Angle tends to hit both bearings. (force magnitude)
* Soft or hard coupling makes much less difference when both shaft is thin and beairngs soft.

19. Thick/hard/hard/angle (Same as slide 16) except increase pump between bearing distance from 30 to 35”. We’d think that is more flexible configuration that decreases stresses. However Max brg force increases from 4546N to 7435N

20. Same thing offset: 7157

21. Thick/hard/hard/angle (same as slide 16)
Thick/hard/hard/angle (same as slide 16). Except DECREASE POB brg stiffness, significant INCREASE in max stress!

22. Same change for offset – not much effect