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How to use multiple parameter to generate the desire probe plots
Posted May 6, 2012, 12:36 p.m. EDT Acoustics & Vibrations, Results & Visualization, Studies & Solvers Version 4.2a 3 Replies
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Does anyone know how to get the desired graphs axis from the table when using a continuation parameter and auxiliary sweep, study 1 and 2 respectively?
Initially the probe plots (9total) is a 3 spikes (acceleration vs. number of values computed consecutively for each corresponding user-defined internal pressures). I've chosen 0 300 600 psi, respectively.
When running the Pre-stress (study1) and then Frequency Domain (study2) the Result tab shows a generated tables values with accelerations (i#) for the 9 probes mounted onto the shell, evaluated over a frequency 16905-16920 Hz, step size 0.25. When the calculations are re-run the 3spikes now has a different x axis replaced with ExtPressure, not 0-123 steps (41 for each pressure defined), which is the consecutive sum of the frequency range/step size for each pressure evaluated. The issue may be a Parameter problem. Both desire 3-peaks and the generated plots w/ x-axis EXTPressure have the same Table values, just different representation.
How can I get Comsol to generate the initial 3 spikes with the # of evaluated steps on the x-axis for different external pressure say: 0 100 600 psi every time we compute study 1 & 2 is re-computed from initial file state?
I ignore the irrelevant study 3 (eigenvalues) .
See attached problem file and Pictures of the two desired probe plots with the right x-axis.
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~Baha'u'llah
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if you have dumped the values into a table withone or several "derived values", and if you have a multiple sweep case, you can swap inner and outer solution (column or row wise) and in anycase when you plot the tables, you can decide to change the default x axis, either by selecting manually the column, or by replacing it by an expression (see the many plot tabs)
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Good luck
Ivar
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Hello again,
Is there a way to plot the parameter values on the x axis for the generated data table?
The par.value is the consecutive evaluated # given to the generated data table correct?
For the example top post: 0 300 600 psi evaluated at 16905-16920 Hz @ step size 0.25 Hz.
so a plot y-x corresponding to variable Y vs. X axis (x being 123 parametric values 41 for each pressure).
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Arts, crafts and sciences uplift the world of being and are conducive to its exaltation.
~Baha'u'llah
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if you define a (or several) probes, you will get a probe plot node, therein you can change the default settings for inner/outer, x value etc
You need to start the solving process at least one iteration to get COMSOL to generate the default nodes, then interrupt the solver, set your plot values, clear the solution and restart your solver
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Good luck
Ivar