Hello sir/madam,
I am Nalinii here and I am a final year student from UTP.I need to run spectral fatigue analysis for jacket platform.I would like to know the step to conduct spectral fatigue analysis in SACS.I would be really glad if sir or madam will be able to help me to show me the procedure especially after the eigenvalue analysis because I am having problem starting from that part.
Quoc,
It is possible that the "Use Wave Response Input File" option is set to "No" in your Dynamic Wave Options. Make sure this option is set to "Yes". I would recommend trying to recreate the analysis from scratch to ensure that the runfile options are not causing a problem. Otherwise, I don't think I can make any other comments without looking at your analysis files directly.
Unfortunately a service request is the only method by which you can securely send and receive files. You may need to login to Bentley.com before trying to access the service request page. Try logging into https://connect.bentley.com/ and clicking the New Service Request link at the bottom of the page.
Geoff,
Thank you for your quick reply. I could not access to service request (access denied). I send you the snapshot of my input file as below, hope you can help. I used the (seainp) file with Force Transfer Function so there is no wave response input file, this can be chosen in <Edit Dynamic Wave Options>. Please advise the method (other than service request) that I can send the file to you for investigation.
Sometimes analysis options may be available only when certain input is in your input files. It is possible that you are missing some critical input in the wave response input file. Unfortunately, it is difficult to say without looking at your files. If you would like, you can submit a service request and attach your files so that one of our technical support representatives can take a closer look at the problem.
Regards,
Geoff
Hi Geoff,
Sorry to use this post to ask, i feel it is related. When I chose the General Wave Response or Deterministic/Transfer Function, there were no SACS common solution file generated as output. I would like to know if this is a software bug or do I need to modify any parameter in the input files so that I can get the (saccsf) file.
Thanks a lot for your help
Nalinii, 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, Geoff