LIMITY
Well-Known Member
- Joined
- Aug 29, 2019
- Threads
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- 82
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- Location
- Washington State
- Vehicle(s)
- 2019 Ford Ranger
*Takes out calculator, writes BOOBS*The OEM System with the flex coupling was probably not for structural reasons but NVH is more than likely. The flex coupling is quite expensive so the development engineers must have had a huge problem. Most program managers would not agree to a flex coupling unless the program was in dire straits. Just my opinion..think structurally you are okay. The problem is that the natural frequency resonance is the square root of the stiffness over the mass. You are fighting this square root radical which means that large changes in stiffness, for example, move the needle very little. For example lets say you increased stiffness from 2 to 4...a 200% increase in stiffness take the square root of 2 is 1.41 and 4 is 2 so comparing 1.4 to 2...the needle only moved about 14%. The flex coupling is a huge reduction in system stiffness so the gains in NVH can be quite large if needed for the program.
best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
Yep, his math checks out.
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