Merge pull request #64 from IEAWindTask37/tower_damping

tweak damping again
IEAWindTask37 · Feb 16, 2024 · 40cf7f4 · 40cf7f4
2 parents 373d9ce + dee04c2
commit 40cf7f4
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diff --git a/OpenFAST/IEA-22-280-RWT-Monopile/IEA-22-280-RWT_ElastoDyn_tower.dat b/OpenFAST/IEA-22-280-RWT-Monopile/IEA-22-280-RWT_ElastoDyn_tower.dat
@@ -2,10 +2,10 @@
 Generated with AeroElasticSE FAST driver
 ---------------------- TOWER PARAMETERS ----------------------------------------
 30                     NTwInpSt    - Number of input stations to specify tower geometry
-0.5                    TwrFADmp(1) - Tower 1st fore-aft mode structural damping ratio (%)
-0.5                    TwrFADmp(2) - Tower 2nd fore-aft mode structural damping ratio (%)
-0.5                    TwrSSDmp(1) - Tower 1st side-to-side mode structural damping ratio (%)
-0.5                    TwrSSDmp(2) - Tower 2nd side-to-side mode structural damping ratio (%)
+0.33                   TwrFADmp(1) - Tower 1st fore-aft mode structural damping ratio (%)
+1.30                   TwrFADmp(2) - Tower 2nd fore-aft mode structural damping ratio (%)
+0.33                   TwrSSDmp(1) - Tower 1st side-to-side mode structural damping ratio (%)
+1.70                   TwrSSDmp(2) - Tower 2nd side-to-side mode structural damping ratio (%)
 ---------------------- TOWER ADJUSTMUNT FACTORS --------------------------------
 1.0                    FAStTunr(1) - Tower fore-aft modal stiffness tuner, 1st mode (-)
 1.0                    FAStTunr(2) - Tower fore-aft modal stiffness tuner, 2nd mode (-)

diff --git a/OpenFAST/IEA-22-280-RWT-Monopile/IEA-22-280-RWT_SubDyn.dat b/OpenFAST/IEA-22-280-RWT-Monopile/IEA-22-280-RWT_SubDyn.dat
@@ -13,7 +13,7 @@ True                   CBMod       - [T/F] If True perform C-B reduction, else f
 0                      Nmodes      - Number of internal modes to retain (ignored if CBMod=False). If Nmodes=0 --> Guyan Reduction.
 1.                     JDampings   - Damping Ratios for each retained mode (% of critical) If Nmodes>0, list Nmodes structural damping ratios for each retained mode (% of critical), or a single damping ratio to be applied to all retained modes. (last entered value will be used for all remaining modes).
 1                      GuyanDampMod - Guyan damping {0=none, 1=Rayleigh Damping, 2=user specified 6x6 matrix}.
-0.0        0.00072     RayleighDamp - Mass and stiffness proportional damping  coefficients (Rayleigh Damping) [only if GuyanDampMod=1].
+0.0        0.00183     RayleighDamp - Mass and stiffness proportional damping  coefficients (Rayleigh Damping) [only if GuyanDampMod=1].
 6                      GuyanDampSize - Guyan damping matrix (6x6) [only if GuyanDampMod=2].
            0.0            0.0            0.0            0.0            0.0            0.0
            0.0            0.0            0.0            0.0            0.0            0.0

diff --git a/OpenFAST/IEA-22-280-RWT-Semi/IEA-22-280-RWT-Semi_ElastoDyn_tower.dat b/OpenFAST/IEA-22-280-RWT-Semi/IEA-22-280-RWT-Semi_ElastoDyn_tower.dat
@@ -2,10 +2,10 @@
 Generated with AeroElasticSE FAST driver
 ---------------------- TOWER PARAMETERS ----------------------------------------
 30                     NTwInpSt    - Number of input stations to specify tower geometry
-0.5                    TwrFADmp(1) - Tower 1st fore-aft mode structural damping ratio (%)
-0.5                    TwrFADmp(2) - Tower 2nd fore-aft mode structural damping ratio (%)
-0.5                    TwrSSDmp(1) - Tower 1st side-to-side mode structural damping ratio (%)
-0.5                    TwrSSDmp(2) - Tower 2nd side-to-side mode structural damping ratio (%)
+0.33                   TwrFADmp(1) - Tower 1st fore-aft mode structural damping ratio (%)
+1.30                   TwrFADmp(2) - Tower 2nd fore-aft mode structural damping ratio (%)
+0.33                   TwrSSDmp(1) - Tower 1st side-to-side mode structural damping ratio (%)
+1.70                   TwrSSDmp(2) - Tower 2nd side-to-side mode structural damping ratio (%)
 ---------------------- TOWER ADJUSTMUNT FACTORS --------------------------------
 1.0                    FAStTunr(1) - Tower fore-aft modal stiffness tuner, 1st mode (-)
 1.0                    FAStTunr(2) - Tower fore-aft modal stiffness tuner, 2nd mode (-)