Tapered Stress Joint Data Inputs

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Tapered Stress Joint Data Inputs

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Taper_Joint

Note

This component is not available in PipeLay Starter Edition

 

 

Input

Description

Joint Properties:

Click on this button to display the Tapered Stress Joint - Properties dialog. See the ‘Tapered Stress Joint - Properties’ section for a detailed description of this dialog.

Dimensions:

Click on this button to display the Tapered Stress Joint - Dimensions dialog. See the ‘Tapered Stress Joint - Dimensions’ section for a detailed description of this dialog.

 

 

Tapered stress joint - properties dialog

TSJ_Properties

Input

Description

Material:

A drop-down list that allows the selection of a Material component from all those already defined in the project. The material can be linear or non-linear. Only non-linear materials in the stress/strain format are supported.

Weight in Air:

The weight in air of the TSJ.

Units: [kN] or [kips]

Weight in Water:

The weight in water of the TSJ.

Units: [kN] or [kips]

Normal Drag:

The Morison’s Eq. drag coefficient for the direction normal to the section, denoted .

Tangential Drag:

The Morison’s Eq. drag coefficient for the direction tangential to the section, denoted . This entry is optional, and if omitted defaults to zero.

Normal Inertia:

The Morison’s Eq. inertia coefficient for the direction normal to the section, denoted .

Tangential Added Mass:

The Morison’s Eq. added mass coefficient in the direction tangential to the section, denoted . This entry is optional, and if omitted defaults to zero.

Normal Added Mass:

The Morison’s Eq. added mass coefficient in the direction normal to the section, denoted . This entry is optional, and if omitted defaults to .

 

 

Tapered stress joint - dimensions dialog

TSJ_Dimensions

Input

Description

Section Length:

The Dimensions dialog allows you to break up the TSJ into different sections each with their own respective dimensional values. The first value to be input for a section is its length.

Units: [m] or [ft]

Internal Diameter:

The section internal diameter.

Units: [mm] or [in]

External Diameter Start:

The section outer diameter at its start point.

Units: [mm] or [in]

External Diameter End:

The section outer diameter at its end point.

Units: [mm] or [in]

Notes:

a)Each TSJ section is modelled numerically using a series of beam elements which have different uniform diameters. These diameters are calculated by assuming a linear variation in diameter across the length of a section from its start point to its end point. The more elements across a TSJ section then the more accurate the taper shape will be captured. Needless to say, the various element diameters are used to calculate corresponding weight, stiffness and hydrodynamic properties, which inevitably means that the element characteristics change as you move across the length of a TSJ section. Again, the more elements that are used then the closer you will get to the actual characteristics of a physical taper.