So basically you need to over dimension the cross section... (for) dynamic loads ?
...considering the same cross sectional area what is the advantage of the rectangle cross section...?
A rectangle will generate less aerodynamic and hidrodynamic drag for the same section area.
An eliptic section would be better in order to minimize drag, but it is hard to find, hard to attach to the beam and hard to attach to the dolphin striker. It is also more expensive.
Other reasons to use a rectangle are:
- Price
- Ease to conform to the required shape
- Firmer attachment to dolphin striker extremity.
Anticipating the next question:
A firmer attachment to the dolphin striker increases the degree of hyperestaticity when compared to a a rod or wire passing through a hole or recess in the dolphin striker's extremity, which is the usual setup. This means "stiffness".
Rgrds,
