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Location Parameter Input

The location parameter input is appropriate when you request an output of bending stress, bending strain, longitudinal stress, longitudinal strain, planar curvature, von Mises stress, pressure, hoop stress, radial stress, or sidewall pressure during postprocessing. What the location parameter value represents depends on the respective force type as described in the following subsections.

Bending Stress, Bending Strain, longitudinal stress, longitudinal strain and Von Mises Stress

If you are postprocessing for Bending Stress, Bending Strain, Longitudinal Stress, Longitudinal Strain or Von Mises Stress, the Location Parameter is an integer value, n, between 1 and 16, which defines the location on the cross section at which stresses/strains are to be calculated at all solution times. For statistical outputs, the output corresponds to the maximum value occurring on the cross-section at each solution time, although in general the location where this occurs can differ from solution time to solution time. This is the default computation method if you do not explicitly specify a Location Parameter.

The Location Parameter, n, corresponds to an angle θ, measured in degrees anti-clockwise from the local element cross-section y-axis. The table below indicates the variation of parameter n with θ.

Since maximum bending stress/strain or longitudinal stress/strain must occur on the riser outer surface, only values for n between 1 and 8 are required (or valid). Longitudinal Strain is available at eight locations around the circumference, just like the bending strain. The longitudinal stress is available at eight locations around the circumference, but not as a maximum value. For von Mises stress, values between 1 and 16 are valid.

Pressure

If you are postprocessing for Pressure, Hoop Stress, or Radial Stress, the Location Parameter can have a value of 1 or 2, depending on whether you need the results at the inner or outer surface or the pipe. If you do not explicitly specify a location, a default value is assumed as shown below.

planar curvature and SIDEWALL Pressure

If you are postprocessing for Planar Curvature or Sidewall Pressure, the Location Parameter can have an integer value between 0 and 360 which represents the angle in degrees at which to calculate the curvature. If you do not explicitly specify a location, a value of 0 is assumed.