Added a new MoorDyn module regression test for external loads and damping on a body object

Author: luwang00

modules/moordyn/CaseList.md

@@ -10,3 +10,4 @@ md_no_line
 md_vertical
 md_lineFail
 md_Single_Line_Quasi_Static_Test
+md_BdyExtLdDmpg

modules/moordyn/md_BdyExtLdDmpg/driver.MD.out

@@ -0,0 +1,19 @@
+MoorDyn driver input file
+another comment line
+---------------------- ENVIRONMENTAL CONDITIONS -------------------------------
+9.80665           Gravity          - Gravity (m/s^2)
+1025.0            rhoW             - Water density (kg/m^3)
+100.0             WtrDpth          - Water depth (m)
+---------------------- MOORDYN ------------------------------------------------
+"moordyn.dat"     MDInputFile      - Primary MoorDyn input file name (quoted string)
+"driver"          OutRootName      - The name which prefixes all MoorDyn generated files (quoted string)
+180               TMax             - Total run time (s) [>=0.0]
+0.005             dtC              - TimeInterval for the simulation (s)
+0                 InputsMode       - MoorDyn coupled object inputs (0: all inputs are zero for every timestep (no coupled objects), 1: time-series inputs (coupled objects)) (switch)
+""                InputsFile       - Filename for the MoorDyn inputs file for when InputsMod = 1 (quoted string)
+0                 NumTurbines      - Number of wind turbines (-) [>=1 to use FAST.Farm mode. 0 to use OpenFAST mode.]
+---------------------- Initial Positions --------------------------------------
+ref_X    ref_Y    surge_init   sway_init  heave_init  roll_init  pitch_init   yaw_init
+(m)      (m)        (m)          (m)        (m)       (rad)       (rad)        (rad)         [followed by MAX(1,NumTurbines) rows of data]
+ 0        0          0            0          0          0           0            0
+END of driver input file

modules/moordyn/md_BdyExtLdDmpg/md_driver.inp

@@ -0,0 +1,41 @@
+A point mass suspended by a line with external force and damping
+------------------------- LINE TYPES --------------------------------------------------
+LineType  Diam    MassDenInAir    EA       BA/-zeta    EI      Can   Cat   Cdn   Cdt
+ (-)       (m)      (kg/m)        (N)      (Pa-s/-)  (n-m^2)   (-)   (-)   (-)   (-)
+nylon     0.124      35.0      5000000.0     -1.0      0.0     1.0   0.0   1.0   0.0
+---------------------------- BODIES -----------------------------------------------------
+ID   Attachment  X0     Y0    Z0     r0     p0     y0      Mass     CG*       I*     Volume    CdA*     Ca
+(#)     (-)      (m)    (m)   (m)   (deg)  (deg)  (deg)    (kg)     (m)    (kg-m^2)  (m^3)    (m^2)     (-)
+ 1     free       0      0    -50     0      0      0    2.1244e4    0        0        0        0        0
+----------------------- POINTS ----------------------------------------------
+Node      Type      X        Y         Z        M        V       CdA      CA
+(-)       (-)      (m)      (m)       (m)      (kg)    (m^3)    (m^2)     (-)
+ 1        Body1     0        0         0        0        0        0        0
+ 2        Fixed     0        0         0        0        0        0        0
+-------------------------- LINES -------------------------------------------------
+Line  LineType    NodeA   NodeB  UnstrLen  NumSegs   Flags/Outputs
+(-)      (-)       (-)     (-)     (m)       (-)        (-)
+ 1      nylon       2       1      48        10          -
+---------------------- EXTERNAL LOADS --------------------------------
+ID    Object            Fext                Blin               Bquad            CSys
+(#)   (name)            (N)                (Ns/m)            (Ns^2/m^2)         (-)
+ 1     Body1  1.0417e5|0.5e5|-1.0e4   1.0e3|0.7e3|0.6e2  3.0e3|2.1e3|1.0e4       G
+-------------------------- SOLVER OPTIONS---------------------------------------------------
+0.005    dtM          - time step to use in mooring integration (s)
+0.0      dtIC         - time interval for analyzing convergence during IC gen (s)
+0.1      dtOut        - time step size to be written to output files (s)
+------------------------------ OUTPUTS -----------------------------------------------------
+Body1PX
+Body1PY
+Body1PZ
+Body1VX
+Body1VY
+Body1VZ
+Body1FX
+Body1FY
+Body1FZ
+ANCHTEN1
+CON1FX
+CON1FY
+CON1FZ
+--------------------------- need this line -------------------------------------------------