Hi,
I am doing fatigue analysis. During wave responce run I am getting Error/Warning as
" *** WARNING MODE 29 HAS 0.849 PERCENT DIFFERENCE AFTER USING 59 PAIRS OF FOURIER SERIES COEFFICIENTS"
This warning is for all modes. Also I have Error in same lst stating
*** ERROR - ITERATION PROCESS NOT CONVERGED
Can any one help me in this regards, any suggestions or Inputs will be appreciated.
Thanx
Hi Shekhar,
Can you tell me more about the fatigue analysis?
What command was issued before each command?
Georgina Maldonado
Answer Verified By: shekhar ghag
I am getting this error amd warning in wave responce analysis. Transfer function and Dynamic analysis is running smooth.
You do not give me much to work with.
What command was issued before each message? Is this fatigue for transportation or inplace analaysis? Or maybe another operation?
I am interested in helping but I cannot help if you provide limited information.
Thank you,
I'm also facing the same problem as mentioned above
I don't faced any error when doing "Dynamics Analysis"
but when I run analysis for "Spectral Wave Fatigue Analysis"
at the Error log shows
*** WARNING MODE 2 HAS 1.511 PERCENT DIFFERENCE AFTER USING 59 PAIRS OF FOURIER SERIES COEFFICIENTS"
when I ask my supervisor he only said "the size of mesh does not suitable with the model size"
I don't really catch up what his means by that,
p/s:
this fatigue for in-place/in-service analysis
Hi Nurul AIni,
The query has been answered in this forum link: Spectral Fatigue Analysis - MAXSURF | MOSES | SACS | OpenWindPower Forum - MAXSURF | MOSES | SACS | OpenWindPower - Bentley Communities"When you generate a transfer function using the wave response module, SACS uses fourier series to represent the generalized forces for each mode due to the wave loading specified. And since a fourier series is just a series of sine waves used to represent a more complex function, there will always be a slight difference (error) between the two curves. More fourier series terms should reduce the error between the two curves. You can set the fourier series error tolerance in columns 31-40 on the WROPT line in your wave response input file (wvrinp). You may refer to section 3.2 of the Wave Response manual for more information about this procedure."Regards,Nur