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Kasiphon Kurojjanawong
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RE: Manual for SACS Wind Turbine
Geoff McDonald
Here is a complete copy. Let me know if this works for you. Regards, Geoff
over 5 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: SACS - Strange SCF of Tubular Connection with Ring Stiffeners
Geoff McDonald
Kasiphon, SACS automatically applies the minimum SF limit of 1.5 for all locations and uses a default of 2.5 for the brace axial crown SCF and brace out-of-plane bending SCF in accordance with the original Smedley and Fisher recommendations which is…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: SACS - Strange SCF of Tubular Connection with Ring Stiffeners
Kasiphon Kurojjanawong
Hi Geoff, It is clear and thank you very much for your reply. I have another question. Refer to API or original paper of Smedley&Fisher, they require different minimum SCF for each location and load type, see picture below. How can I put in SACS…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: SACS - Strange SCF of Tubular Connection with Ring Stiffeners
Geoff McDonald
Kasiphon, SACS is taking the maximum axial SCF in accordance with API RP 2A Section C5.3.3 stating that maximum saddle and crown values should be applied to the whole brace/chord intersection: Essentially we are just taking the maximum axial SCF…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: SACS - Strange SCF of Tubular Connection with Ring Stiffeners
Geoff McDonald
Kasiphon, I need to check with the developer on this one. I think it may have something to do with how the ratio is applied to the stress which may be causing the problem, but it does look suspicious that the SCF is identical for the cradle and saddle…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Extrapolated and Stretched Airy Wave Theory
Geoff McDonald
Kasiphon, 1) Do we have 'Extrapolated Airy Wave Theory' in Seastate software ? If not, can we have in the future SACS version ? Seastate doesn't support Extrapolated Airy Wave Theory yet, only in Wave Response. I will put in an enhancement request…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: How to separate fatigue life of brace and chord on screen ??
Wen Meng
Hi Kasiphon, The results reported in SACS are the total damage/fatigue life and the fatigue check criteria should be the same for both chord and brace members despite of different SF defined( eg: D<1, Life>50). So the question here is to define different…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Method used for stiff clay in SACS for generation of API-recommended p-y data
Geoff McDonald
Rupam, According to API RP 2A Section 6.8.5, the load deflection curves for soft clays are not applicable. The user should use good judgment in determining the load deflection curves for stiff clays. SACS uses the soft clay p-y parameters from API for…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: The forum is not working for Safari
Geoff McDonald
Kasiphon, I just tested posting to the SACS forum and viewing replies on Safari and did not have any issues. Some users have been experiencing problems due to an outdated cache on their device. You can try clearing the Safari browser history and website…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: How can we get ‘Stress Range VS Cycle’ from SACS Rain-flow counting calculation?
Wen Meng
Hi Kasiphon, First you can always open fatigue extraction using the old "Interactive fatigue" module normally. You may experience problems when try to open that in "Precede" as this is newly developed and not stable. However we're fixing that in next…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: SACS 5.7 Version/Code Check for Tubular & Non-Tubular Member
Geoff McDonald
Kasiphon, You are correct. Apparently that feature has not yet been implemented. Sorry for the confusion. Regards, Geoff
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Spectral Wind Fatigue Analysis - Length, Roughness, CSF, EXTRACT and Fatigue Damage File
Geoff McDonald
Danilo, The common solution file generated from the static analysis of the SEAOCI does not contain the fatigue damage at any point during the analysis. It is the solution of the stiffness matrix for the load cases provided. In the case of the spectral…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Spectral Wind Fatigue Analysis - Length, Roughness, CSF, EXTRACT and Fatigue Damage File
Geoff McDonald
Danilo, I just wanted to follow up on one item because I found a workaround that will allow you to generate a fatigue damage file for spectral wind fatigue: Set up your Spectral Wind Fatigue Analysis as usual and run the analysis. Set up a separate…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Spectral Wind Fatigue Analysis - Length, Roughness, CSF, EXTRACT and Fatigue Damage File
Geoff McDonald
Danilo, 1. The recommended value for the reference length is 1800m. I am not sure why the average reference length is 180m in DNV-RP-C205. I will note that the the DNV formula does look a bit different than the Harris spectrum referenced in our Dynamic…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
RE: Spectral Wind Fatigue - Harris Spectrum Equation
Geoff McDonald
Danilo, The equation that you described is indeed the same formula with a few additional terms. Sometimes the wind spectra is defined in terms of f*S(f)/U^2 instead of S(f) so if you divide out f/U^2 from the following equation you will end up with…
over 6 years ago
MAXSURF | MOSES | SACS | OpenWindPower
MAXSURF | MOSES | SACS | OpenWindPower Forum
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