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Get the relevant norm (e.g. ISO 8528-9 for gensets, for sure there is an ISO / EN or other for your specific application) which gives the maximum allowed vibration, and use that one for your layout. You should have the allowed vibration in function of frequency of the sensitive equipment, and...

Don't cool it in the same loop, get a cooling water loop and use water heat exchangers with a thermostat & bypass. The radiator manufacturer should be able to tell you how big you need to size it depending on the temperatures and location.

Yes and yes. A typical value is 0.001 of the shaft diameter. But this can vary widely depending on: - application: passenger cars will have less clearance, heavy power pumps will have larger clearance. - oil used & oil temperature - rotational speed & load - ... And yes, journal bearing...

What is the increase in charge air temperature? 15% derating is high. 102F is not that high, so it seems mostly to be a cooling issue because of the high humidity? If your engine has knock protection and you can follow up on everything, I'd just derate less (depending on charge air temp, ~ 5%...

Depends on your settings, most notably NLGEOM and your element formulation. I've dug up the relevant page in the manual for you: Stress and strain measures The stress measure used in Abaqus is Cauchy or “true” stress, which corresponds to the force per current area. See “Stress measures,”...

From my understanding of your question, the conclusion that you should make is that you do not know what von Mises stress is. Unless you are performing a uniaxial FE test, why would you be surprised that the von mises yield criteria is not the same as the maximum principal stress theory? Which...

Cheapest solution (similar to your welding solution): Take a hammer & pin punch and hit (in between) the threads of the bolt & nut after tightening (i.e. a DIY deformed thread lock nut).

If I understand you correctly, you just want the yield strength of whatever material your hole is tapped in? And for shearing, just divide by sqrt(3).

are you looking at stress or force? how refined is your mesh?

The beam elements should EXACTLY match the solutions by hand. And if this is a simple supported structure and your model is good, the solid elements should give a more precise answer. But, as mentioned, if the beams are slender, difference should be small. For thick beams, eg. check with roark...

when you want to incorporate non linear effects ... so all large strain cases, all non linear material cases, etc.

What you want to do is put a slender beam in a (relatively) soft material: search for deep pile foundations: eg. http://www.simulia.com/download/pdf2009/Qiu_SCC2009.pdf

Depends if you want to take into account the time (rate) dependent behavior or not ... Steel is also viscoelastic. Anyway, if you are going to have large deformations, a hyperelastic material law will probably be better for all purposes.

Model the rope as truss elements without compressive strength, there's a checkbox in either the material or section widget.

just do a check if it exists and delete the .lck file?

Since it is just text format, you can use whatever scripting or programming language you feel comfortable with to write out the input file, make one in CAE first to see what it looks like (or check out the examples and benchmark manual).

Normally the default does a good enough job. Changing the cutback factor and number of allowed cutbacks doesn't have a clear downside (apart from poorer performance). If you need to cut way way waaay back there probably is something wrong with your simulation. Messing with tolerance values can...

add mass to the reference point

I looked at your .cae again and you are right. And I have no idea why it is happening. If you have access to support, this would be a good question.

you can define a point; load the point; make contact between point and surface; move the point this is often done in bridge loading by trains or cars