Control of Knuckled Stiffeners
- Last UpdatedDec 08, 2025
- 2 minute read
When a stiffener becomes knuckled because of the relative orientation of the profiles it is connected to the user need not make any special indication - AVEVA Marine will automatically find out and evaluate the knuckling data.
Otherwise the knuckling is controlled by the following sub-syntax of the common stiffener syntax:
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INC = <inc1>, <inc2> |
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[,KNH = <height>] [,KNL=<length>] |
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/ [,KNH = <height>] [,KNL=<length>] |
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INC |
Specifies two inclinations of the profile. The first value is the inclination of the part of the profile, welded to the plate. The second is the orientation angle of the knuckled part. This angle is calculated relative to the trace line in the same way as specified for INC in the common syntax (that means, the knuckling angle may be different from <inc1> - <inc2>). |
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<inc2>= 1| 2 | 3 is interpreted in the same way as there. |
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KNH |
Specifies the distance from the current end point to the knuckle line just above the end point (see the image below). KNH must be smaller than the profile height. |
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KNL |
Specifies the distance from a point on the upper edge of the profile just above the current end point to the point where the knuckle line reaches the edge of the profile, see the image below. |
The number of total occurrences of the keywords KNH and KNL (for both end points must not exceed two).
Examples:
Knuckle input for the stiffener in the image above may be as follows.
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Example 1: |
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STI, ..., INC=90,75, KNH= 75, ... / ..., KNL=500, ... ; |
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When the stiffener end should be bent so that the knuckled part is located in a given plane, this is controlled in the following way: |
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The next example illustrates the knuckling data require to generate the stiffener in the image below.
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Example 2: |
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STI, ..., INC=90,2, KNH=0, ... / ... ; |
