If this is fastened in a random vibration machine and the fasteners used are socket head cap screws?
The fasteners will only create a compressive force at the threads and at the contact of the cap and the block? so the g-force from the vibration is not transferred??!
Homework Statement
It's not exactly a homework question, just want to see if i have the right concept in drawing free body diagrams
See attached Picture.
In case 1, the object is fastened on plane x-z and the rectangular block is fastened to the T-block in y-z plane.
Will the force be...
I'm unsure as to why only one of two mating parts are threaded?
The top part is usually a clearance hole and the thread is only applied to the bottom part. Why is this so?
Your first statement gave me clues. I went to look at the drawings for the vibration machine and it has only ONE accelerometer measuring a single axis. It is placed close to the specimen.
However, upon reading some literature (attached file), the Grms and G-force values are correlated by a...
use Darcy weisbach eq
http://en.wikipedia.org/wiki/Darcy%E2%80%93Weisbach_equation
calculate the reynolds no. and find out the friction factor using the moody diagram, unless u can assume whether its laminar/turbulent/ if friction factor is already given
just plug in the limits to the substitutition.
but usually you do not substitute a sec function, usually you would substitute a simpler function.
gd luck.
You are both right. But thanks for the detail in explanation for the part on RMS @Vadar2012.
I'm comparing because I want to ensure that the level of excitation at the component on the test specimen is really experiencing the desired magnitude of vibration that I've set on the vibration...
@vadar2012
- I want to reconcile the graphs as I want to confirm the magnitude of vibration applied by the vibration machine to the test specimen. ( however by using an accelerometer, it gives g-force while machine gives Grms)
- The vibration machine is a random vibration machine, as such does...
Yes the accelerometer is of a larger value as I'm referring to the peak values and Grms is derived from the integral of the PSD plot.
But how do i convert the g-force values of the accelerometer such that i can compare it with the Grms value the vibration machine gives? (both the...