$SHEAR7 |
 
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$SHEAR7 |
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This section corresponds to prediction of VIV fatigue damage by interfacing with SHEAR7 program developed by a team at MIT. Refer to SHEAR7 Interface for further details.
This section contains the following keywords:
•*CURRENT is used to specify the current to be considered in the SHEAR7 analysis.
•*CUTTOFF MODES is used to define the SHEAR7 parameters “Power Cutoff” and “Primary Zone Amplitude Limit”. These parameters are applicable to SHEAR7 4.5 and later. The SHEAR7 User Manual provides a detailed description of these parameters.
•*DAMPING RATIO is used to define the SHEAR7 structural damping ratio.
•*FATIGUE DATA is used to assign fatigue data to SHEAR7 sets.
•*FATIGUE OPTIONS is used to specify fatigue calculation options for SHEAR7 in Block 5.
•*FOLDER OPTIONS is used to indicate where the SHEAR7 input files will be generated and run.
•*HIGHER HARMONICS is used to define the higher harmonics amplification factor and threshold values.
•*NAME is used to specify a title for SHEAR7 analysis run.
•*NON-ORTHOGONAL DAMPING is used to define the Non-orthogonal Damping calculation flag.
•*OUTPUT FILES is used to request output file types from SHEAR7. The available output file extensions are *.anm, *.scr, *.dmg, *.fat, *.str, *.out, *.out1, and *.out2. Refer to the SHEAR7 User Manual for further information on the output file generation options. The output file options can vary between versions of SHEAR7.
•*POWER RATIO EXPONENT is used to define the type of the Power Ratio Exponent for SHEAR7.
•*REFERENCE DIAMETER is used to define the Reference Diameter value.
•*RESPONSE is used to define the SHEAR7 response definition/resolution to be used in the output file.
•*RESTART is used to indicate which modal analysis should be used in order to generate the SHEAR7 model.
•*S-N CURVE is used to define S-N curves to be used in SHEAR7 analysis.
•*SECTION COEFFICIENTS is used to assign SHEAR7 coefficients to element sets.
•*SECTION PARAMETERS is used to assign SHEAR7 parameters to element sets.
•*SLIP-STICK HYSTERESIS is used to specify various parameters relating to the SHEAR7 Slip-Stick Hysteresis module.
•*STRESS TIME HISTORY OUTPUT is used to specify various parameters relating the stress time history output file (*.s7sth).
•*VERSION is used to provide Flexcom with basic SHEAR7 interface information.
•*ZONES is used to define element sets that will be used as one zone in SHEAR7.