Straight Stiffeners, Straight Flanges

The mass and mass center of a straight stiffener and a straight flange are calculated in the following way.

The starting- and ending points of the moulded line define the moulded length. The geometry of the cross-section figure is generated for the profile. Its area and moments in the cross-section plane are calculated.

So the weight of the stiffener or flange is the length of the moulded line multiplied by the cross-section area and steel density.

Before calculation of the mass center, the cross-section figure is turned at the prescribed angle with regard to the panel plane and moved to that side of the panel plane, which is defined in the stiffener or flange attribute. The thickness of the first panel plate is taken into account in the movement.

The mass center of the stiffener is now calculated by making a transformation in the cross-section plane from the middle point of the moulded line to the mass center of the cross-section figure.

Figure 1:1.Transformation of moulded line.