it,
[3] the upper limit, [4] the slider position.
What do you think?
Matt
Radlab, Incorporated
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Boston, MA 02210
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P| 617.440.3588…
Added by Matt Trimble at 7:54pm on November 17, 2009
BS EN 1993-1-1:2005), which have matched perfectly for the shear force utilization, but which are slightly (~10%) off for bending moment utilization. I have tried multiple Class 1 and 3 cross sections, using the plastic and elastic section modulus respectively as outlined in section 6.2.5, but my result for bending moment utilization is always slightly off. It always lies somewhere between the result predicted by the elastic section modulus (pi*(R^4-r^4)/(4R)) and the plastic section modulus ((D^3-d^3)/6), which has made me wonder if Karamba is using some combination of the two in calculating utilization. I have also checked if using the reduced yield strength considered in 6.2.8 (Bending and Shear) helps, but this does not match the Karamba output either.
The Grasshopper file I am basing my calculations on is attached. Thanks in advance for any insight you can give!
Best,
Tess
…
he installation folder, Drag & drop SYNTACTIC(green one) over your grasshopper canvas.3. Close your rhino and reopen it. 4. Type GrasshopperDeveloperSettings5. Tick the Memory load *.GHA assemblies using COFF byte arrays option6. Run grasshopper and enjoy plugin…
picture:
... and on a PC without anything attached to the serial port. When you open the port, start the read component and its timer, do you then get a stream of <empty> values in the log output? (hmmm... I suppose that's only reasonable - but still, you are also seeing this?)
I suppose that, because of the mutually exclusive behavior of both the spider and grasshopper (i.e. only one at a time can access the COM port), we can deduce that we are listening on the correct port.
Am I listening on the correct pin (if such a notion makes sense at all)? If I look back to the spider software, I see that 9 channels are listed and that it's only the measured value on channel 0 that changes when I press the load cell. Channels 1, 2, and 3 report OVERFLOW; 4, 5, 6, and 7 are pretty much constant at 0.000 to 0.005 V; and channel 8 says FFFF. I do not know how things like that work so I do not know if they reflect reading from the 9 pins on the D-sub 9 connector.
As for your BTW question: no, I don't need to record all of the sensor values. I suppose that the Out value on the Read component will always reflect the most current value and that's all that I need to get on with life. In the end, the idea is that we have 4 load cells in the 4 corners of a plate onto which a vertical pipe is fixed. Loads are then put on the top end of the pipe and we'll have to visualize both direction and magnitude of the bending moment that is calculated from the compression - tension readings from the load cells... We've done this on a scaled model and streamed load cell information into MatLab. Now we'll have to use a different datalogger and I was hoping to be able to do the post processing in Rhino.
wim…