what is the value 70.4 in the following vibration calc

robjan · **Joined:** Mon, 12 Sep 2011 16:29:52 UTC **Posts:** 2

I am trying to better understand the vibration calculations for sinusoidal quantities and have a question on d (displacement) = 70.4 x 10^6 x a/f^2. the multiplier 70.4, where is this from and is it a constant when trying to answer my colleague on this I was stuck trying to break this down a bit.

mathematic · **Joined:** Fri, 1 Jul 2011 01:17:26 UTC **Posts:** 329

robjan wrote:

I am trying to better understand the vibration calculations for sinusoidal quantities and have a question on d (displacement) = 70.4 x 10^6 x a/f^2. the multiplier 70.4, where is this from and is it a constant when trying to answer my colleague on this I was stuck trying to break this down a bit.

There is no way to answer this without context.

robjan · **Joined:** Mon, 12 Sep 2011 16:29:52 UTC **Posts:** 2

I have a list of calculations to enable us to break down the vibration in mills peak to peak to velocity in inches per second pk. There is a list of calcs for vibs and an online calculator but I was using this formulae and was trying to understand where this variable 70.4 comes from in this equation.

mathematic · **Joined:** Fri, 1 Jul 2011 01:17:26 UTC **Posts:** 329

robjan wrote:

I have a list of calculations to enable us to break down the vibration in mills peak to peak to velocity in inches per second pk. There is a list of calcs for vibs and an online calculator but I was using this formulae and was trying to understand where this variable 70.4 comes from in this equation.

What is "mills peak to peak"?
What is "inches per second pk"?

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what is the value 70.4 in the following vibration calc

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