Recent content by CmRock314

M.E. here (I took Machine Design I and II in undergrad). Machine design gets into the effects of what the aero loads actually do. A.E.'s are typically given a set of thermal and fluid boundary conditions (density, fluid properties, object velocity, the angle of attack, etc.) and compute a set of...

I appreciate the thoughts. I have found a lot of information. One of the things I ended up discovering is PSD was not actually used. It was simply just an FFT of a transient sine vibration that used multiple overlaps (90%) to capture the peaks of the transient; the peaks from each estimate are...

I have a couple thoughts. I process accelerometer data [almost] daily so I'm quite familiar with working with them. Be sure to look up whether your accelerometer excludes the effects of gravity (many do). 1.) First thing I would do is integrate the acceleration time history (look up...

Thank you! I appreciate it.

Thank you!

Hello, I'm new here. I graduated last year with an M.S. in M.E. and I am structural dynamicist. I work in acoustic, shock, and vibration testing and analysis. I look forward to many technical discussions in structural dynamics!

To reduce sound, you need a material that will attenuate the acoustic transmittance. It has to be a compliant material that will absorb sound energy. Higher density materials will transmit the sound better (i.e. the sound waves travel faster in denser objects). A material such as dynamat, which...

I have a question regarding transient vibration data I received that was processed into a peak-hold equivalent amplitude (units = g). I have come across peak-hold before which is a type of "averaging" that retains the highest values from each estimate in random vibration overlap processing and...