Stress Joint Line Type

The Stress Joint component may be used to model stress joints with varying cross sections.
An arbitrary number of segments may be included and each segment will consist of one element.
Thin-walled pipe cross-sections will be generated automatically for each element in the stress joint.

1. Parameters

1.1. Specification

Hydrodynamic load formulation for the stress joint line type. See Hydrodynamic Load Models for a description of the the load models. The options are:

  • Morison’s generalized Equation

  • Time domain VIV loads

  • No hydrodynamic loads (None option)

If load type is Morison, define the following parameters for the stress joint line type:

  • Quadratic drag coefficient in normal direction

  • Added mass coefficient in normal direction for the stress joint line type.

  • Internal fluid component type identifier (NONE for no fluid)

If load type is Time domain VIV loads, define the following parameters for the stress joint line type:

If the load type is set to None, then the stress joint will not experience any hydrodynamic loads. This may be useful for modeling stress joints in air, or for modeling stress joints with a very small diameter where the hydrodynamic loads are negligible. Internal fluid can be defined by specifying:

  • Internal fluid component type identifier (NONE for no fluid)

2. Initial Cross-Section parameters

  • External diameter at the first end of the first conical section

  • Wall thickness at the first end of the first conical section

3. Conical Section Parameters

This section is repeated for each conical section in the stress joint. Each section consists of the following parameters:

  • Ext. diameter at second end: External diameter at the second end of the section

  • Wall thickness at the second end of the section

  • Length: Length of the section

  • Num segments: Number of segments within the section

  • Elastic modules: Young’s modulus of elasticity

  • Material density: Density of pipe material