Mil-Std-810 Random Vibration Profile Question
Mil-Std-810 Random Vibration Profile Question
(OP)
Hi,
Can anyone help to explain a profile in Mil-STd-810.
The profile is shown in Fig 514.5C-9.
It's a vibration profile for propellor aircraft.
L0 is the g2/hz value for the first prop frequency. The profile rolls off at 6db/octave. How do I work out the g2/hz for the other frequencies (harmonics)?
f1 is twice f0 so that's an octave. Does this mean the g2/hz at f1 is L0/2 or is it L0/4 - is the g2/hz rolling off at 6db/octave or is the g rolling off at this rate and therefore g2/hz is a factor of 4 per octave lower?
Can anyone help to explain a profile in Mil-STd-810.
The profile is shown in Fig 514.5C-9.
It's a vibration profile for propellor aircraft.
L0 is the g2/hz value for the first prop frequency. The profile rolls off at 6db/octave. How do I work out the g2/hz for the other frequencies (harmonics)?
f1 is twice f0 so that's an octave. Does this mean the g2/hz at f1 is L0/2 or is it L0/4 - is the g2/hz rolling off at 6db/octave or is the g rolling off at this rate and therefore g2/hz is a factor of 4 per octave lower?





RE: Mil-Std-810 Random Vibration Profile Question
RE: Mil-Std-810 Random Vibration Profile Question
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RE: Mil-Std-810 Random Vibration Profile Question
To see an example with numeric values look at figure 514.5C-17.
Peter
RE: Mil-Std-810 Random Vibration Profile Question