Flexcom > Data Inputs > $SHEAR7 > *SECTION PARAMETERS

Purpose

To assign SHEAR7 parameters to element sets.

Theory

Refer to SHEAR7 Data Specification for further information on this feature. For more information, refer to the Shear7 User Guide which is available for download from the Shear7 Support web page.

Keyword Format

A block of two lines defining the section parameters. The block may be repeated to allow for the specification of different parameters to different sets.

Two lines that make up the block:

SET=Set Name

[Reduced Velocity Bandwidth][, Strouhal Number][, CL Reduction Factor] [, Zone CL Type]

Table Input

Input:	Description
Set Name:	The element set to which the parameters are to be assigned. This defaults to all elements.
Reduced Velocity Bandwidth:	The Reduced Velocity Bandwidth (dVR) is the width of the band, expressed as a fraction of the critical relative velocity that will be used to define which possible modes could lock-in. The value defaults to 0.4 if not specified. See the SHEAR7 User Manual for further details See Note (a).
Strouhal Number:	The Strouhal number uniquely defines the relationship of flow velocity and cylinder diameter to the local vortex shedding frequency. The default value for this coefficient is 0.18. See the SHEAR7 User Manual for further details. See Note (a).
CL Reduction Factor:	The CL Reduction Factor allows the user to modify the lift coefficient iteration scheme. The lift coefficient reduction factor is multiplied by the CL value in the CL tables. The default value for this coefficient is 1.0. See the SHEAR7 User Manual for further details. See Note (a).
Zone CL Type:	The Lift Coefficient Table specifies which CL table from the common.cl table. The default value for this coefficient is 1. See the SHEAR7 User Manual for further details. See Note (a).

Notes

(a)All default parameters are based on SHEAR7’s recommendation for a bare riser.