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frequency domain analysis
Posted Apr 24, 2015, 1:48 p.m. EDT 1 Reply
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I have build a piezoelectric cantilever for displacement analysis.In frequency domain analysis i have given frequency range: range(0,1,1000).But getting error
" Failed to find a solution for the initial parameter.
The relative residual (10) is greater than the relative tolerance.
Returned solution is not converged."
please help me to solve this error.
" Failed to find a solution for the initial parameter.
The relative residual (10) is greater than the relative tolerance.
Returned solution is not converged."
please help me to solve this error.
1 Reply Last Post Apr 24, 2015, 2:17 p.m. EDT
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Posted:
10 years ago
I'm having convergence problems myself (see my thread; no response yet) but one thing I'd recommend here is not to increase frequency in 1 Hz steps but rather do an exponential or other type of progression.
For example:
1000*sinh(5*range(0,0.05,1))/sinh(5)
A hyperbolic function is used here because unlike an exponential that gives you zero.
Otherwise it will be a real grind when you're solving 837, 838, 839....
For example:
1000*sinh(5*range(0,0.05,1))/sinh(5)
A hyperbolic function is used here because unlike an exponential that gives you zero.
Otherwise it will be a real grind when you're solving 837, 838, 839....