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Vibrational Modes: How They Affect Motion
- Thread starter Kajan thana
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AI Thread Summary
The discussion centers on the interpretation of vibrational modes in relation to accelerometer data from a Bimorph beam (PEH). The "Predicted" graph is believed to be generated using Finite Element Analysis (FEA) tools, while the "Measured" graph reflects actual data collected from experiments. The setup likely involved exciting the MEMS arm with a high mechanical impedance source and varying the frequency to obtain the results. This approach is analogous to plotting the transfer function of a two-port network. Understanding these graphs is crucial for analyzing the vibrational behavior of the system.
I was enrolled in an online plumbing course at Stratford University. My plumbing textbook lists four types of residential toilets: 1# upflush toilets 2# pressure assisted toilets 3# gravity-fed, rim jet toilets and 4# gravity-fed, siphon-jet toilets.
I know my toilet is not an upflush toilet because my toilet is not below the sewage line, and my toilet does not have a grinder and a pump next to it to propel waste upwards. I am about 99% sure that my toilet is not a pressure assisted...
After over 25 years of engineering, designing and analyzing bolted joints, I just learned this little fact. According to ASME B1.2, Gages and Gaging for Unified Inch Screw Threads:
"The no-go gage should not pass over more than three complete turns when inserted into the internal thread of the product. "
3 turns seems like way to much. I have some really critical nuts that are of standard geometry (5/8"-11 UNC 3B) and have about 4.5 threads when you account for the chamfers on either...
Scenario 1 (figure 1)
A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material.
The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm).
At this level of stretch, the load cell reads 45N tensile force.
Key numbers...
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