Hi everyone,
I have a question about a bending analysis I'm working on. The part in question is a flat glass plate with a series of holes. The glass manufacturer only provides one strength value - bending strength - which is 25 MPa. I've set up a simulation in ANSYS where I solve for maximum...
kingnero - that's right, a couple people I work with suggested that if the structure with the load on top has a natural frequency of 10 Hz or higher, that would be a good indication that it will be stable. My hope with this forums post was to explore whether that 10 Hz estimate is reasonable.
We've already done a static structural analysis, and the vertical support members are plenty strong enough to support the load. However, that analysis is valid even if the vertical support members have no horizontal cross members connecting them together to make a frame; it's just looking at...
Thanks for the quick responses everyone. Wanted to clarify one thing - the support stand won't be used while any scientific data is being collected. It's only used during assembly and then the instrument is removed before the experiment starts. So the goal here isn't reduction of noise or high...
Hi all,
I'm primarily a mechanical design engineer working on a structural engineering problem, so I'm working with a lot of concepts here that I haven't seen since college. I've designed a support frame for a heavy (~5000 lb) scientific instrument, and I've been doing analyses to determine...
Almost - 0.13 m^3 control volume with a 0.13 m^3/hr flow rate. Either way though yes, 1 volume per hour. If most formulae assume faster flow though, shouldn't I expect my hand calculations to yield an even shorter purge than the CFD, rather than longer? That's why I think something is still off...
Just to be clear, the hand calculations I'm after are indeed for a simplified scenario that excludes the tube assembly, since no hand calculation could ever hope to capture all of that complexity. I can then hypothesize in what way the exclusion of the tube assembly would cause differences from...
Hi everyone - thanks for the responses, I'll try to answer these questions.
LittleInch - The goal is to get down to an average of 1 ppm of original air, or up to 999,999 ppm argon. My CFD showed 3.83 hours to purge. The CFD includes an assembly of tubes with venting holes within the control...
Hi there,
I'm working on a gas purging analysis for a rectangular control volume. The control volume is initially full of ambient air; the bottom surface is an inlet for gaseous argon flowing at a constant velocity, and the top surface is an outlet for the mixture of argon and air. The goal is...
