Vibration
What is meant by “fixturing” in regards to vibration testing?
As stated in ISTA testing protocols, "Restraining devices shall be used to... (1) Prevent the test specimen from moving off the platform and (2) maintain test orientation of the packaged-product, but (3) not restrict the vertical motion of the test ...
Does the time my package was vibrated in the lab equate to distance traveled in shipment?
The answer to the question of whether a specific vibration test time requires to actual distance traveled in shipping is YES and NO, depending on the test and the shipping means. YES, under certain specific conditions. NO for many common ...
Is there a formula to calculate the g level at a certain frequency and displacement during vibration testing?
The formula that relates g, frequency, and displacement for sinusoidal vibration is: g = 0.0511 x f2 x D Where g is zero-to-peak acceleration f is the frequency and D is the double amplitude displacement in inches. For example, 0.5g at 2Hz requires a ...
What are the benefits of random vibration testing vs. fixed-displacement testing?
The answer, in a nutshell, is "better simulation of the actual transport environment". Fixed displacement vibration has been around for over 60 years, and was the first type of vibration ever used for packaged-product testing. In reality, it was ...