Creating a Cable |
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Creating a Cable |
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This article summarises creation of a cable for Example 3. It is divided into the following sections:
‘Material Component’ describes the specification of the material for the cable.
‘Cable Component’ describes the specification of the cable.
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The cable is made of linear steel, so you must create a Material component in a similar way to the pipe section non-linear material component to represent it.
The Linear material specification is much simpler. A Linear material component named "Cable Steel" is created with the properties outlined in Example 3 and as shown in the figure below.
Specifying Linear Material Properties
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You can now proceed to creating a Cable component. To create a cable in the Line folder, right-click the folder and select New > Line > Cable Select this new cable and rename it “Winch Cable”.
As with the Pipe Section component, you will notice that there is a Specification drop-down list, which provides two options; Standard and Direct. The Standard format references a Material component and is based on a solid cross section, whereas the Direct format requires you to specify properties directly and assumes a stranded section. For Example 3, you’ll use the Standard format, so the default selection remains unchanged.
Pressing the Cable Properties button opens the dialog shown in the figure below.
Cable Properties
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Again, most of the parameters here are standard numerical values. Clicking on Material presents a drop-down list with all the Material components in the project. At this stage, you have two options, Cable Steel and X65 Steel. Naturally you should select the Cable Steel option.
The Weight in Air / Unit Length, Weight in Water / Unit Length, Axial Stiffness and Bending Stiffness contain the value CALCULATED by default. This means that the program computes both values internally using the outer diameter, thickness, and material properties you’ve specified. If you want to override this computation, you can input both values directly. If you do specify a Weight in Air / Unit Length, any value you might have input for material Mass Density is ignored – the mass density is calculated from the weight in air and the cross-section area. For this example, you’ll use the default values as calculated internally.
Input the other cable properties outlined in Example 3 and as shown in the figure below, and click OK.
Cable Properties
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